VIVO X Fold Plus + 12GB + 512GB Grey

SKU x-fold-plus-12gb-512
Previous
Next

Important Info:

Location: Asia
Possibility to return: No
Length of warranty 12 months
Warranty Extension: No
Dual Sim Yes
5G Yes
Rom: Original China Multilanguage (possible Google Apps)
Processing time for warranty service from 6 weeks
Processing time for warranty repair to 12 weeks
Available
$ 1,119.99
+ possible tax

Follow the price

Keep track of the price drops on this item. Simply enter your email here and we will send you an email alert.

Invalid email

Watch it
Available delivery options:
Close

Frequently Asked Questions

Delivery dates are provided on every product page, below product name. When you'll click the dates, a calendar will appear.

AFTER YOU MAKE AN ORDER: These dates are also available at your customer area -> order history, and with the e-mail with order confirmation.

The price of the product is final, however, there may be costs when crossing the border of your country, depending on the type of declaration you submit. You can ask us for any customs declaration during the cart submission process, you can enter this value in the "Customs declaration" or "Comments" field. However, sometimes Customs will not respect these values so it is a good idea to be prepared to pay the domestic tax when your package arrives.

In EU and UK you are going to pay your country VAT from declared value (ex. 20% in UK) + small clearance fees depending on the delivery method, for details please ask local DHL, Fedex or UPS customs agency.

If you are a European citizen / entity and have an EORI number, you can deduct this tax later.

USA customers/entities do not pay tax.

In most cases we can ship to your country, you can check the cost after you'll add product of your choice to the cart (no purchase is needed).

Dear, this product is factory unlocked, should work in your country. If it's smartphone or have GSM model it might be wise to compare it's LTE/5G frequencies with the LTE/5G frequencies of your network to confirm coverage compatibility (they are listed in the product description). If frequencies aren't listed there, please contact us.

List of the package contents is usually listed at the end of the product description.

Check our full Questions and Answers section 

By clicking here

OTA updates are most likely going to work in most of the devices bought at our website and they should not change system sate ex. removing multi-language and google apps.

However, there are devices where OTA will not work, we usually inform about it on the product page, in the "ROM" section. If you'll not be able to make automatic updates, you may always try to make manual system update, which may require some skills or tools (ex. ADB) installed on your computer. It may also remove system customisations installed before ex. multi-language support. For more info you may ask us a question from product page.

NFC will most likely work on the most of the devices bought on our website. 

Exception are some, but not all, devices sold with unlocked bootloader, due to Global rom installation ex. Xiaomi. Some other devices with Global rom installed on original rom, and unlocked bootloader shouldn't have problems with NFC payments - ex. Realme devices. Root can also cause NFC banking applications not work, but our store in current time don't sell rooted devices at all (state for January 2024).

If you have doubts if your device will have NFC payments working you should ask us every time by product questions available at product page or checks questions of the other customers at the bottom of the product page.

14 days returns

Locally - to addresses in the UK, Germany or the USA (check exceptions)

12 +12 Months Warranty

Free guarantee up to 24 months for selected products (Check requirements)

100% Genuine

Only Original, *not* refurbished Products

Vivo X Fold

 

2K+ 120Hz excellent screen

2K+ E5 super-sensing folding giant screen, 120Hz refresh rate inside and outside.
Aerospace-grade worry-free hinge, worry-free folding. 3D Ultrasound Dual Screen Fingerprint.

Snapdragon 8+, stronger core

Upgrade Snapdragon 8+ flagship processor, TSMC 4nm process,
dual 5G dual card dual pass. SPU chip-level privacy security guard.

80W fast charge evolution

80W dual battery flash charge + PD dual port charger,
50W wireless flash charge, equivalent to 4730mAh large voyage battery.

Folding ecological upgrade

It supports the compatibility of TOP 5000+ APPs, and the
key adaptation of 200+ APPs. Among them, high-frequency APPs such as WPS and WeChat reading have
achieved deep adaptation. It can meet 90% of the user's daily
use time.

ZEISS Professional Imaging

Zeiss T* optical lens, four shots at all focal lengths,
master image.

Round and round

The square-
shaped canvas and the ring embellished with the faint golden ring are integrated with the
continuous surface craftsmanship. The oriental artistic conception interprets the beauty of science and technology.

Self-contained aesthetic realm

The profound background that runs through the Chinese civilization symbolizes the
nation's hope, self-confidence and forge ahead.

this one"Huaxia Red"The color matching also represents vivo's tribute to the Chinese civilization's forge ahead, pioneering and innovative.

Physical mute button

One-click mute, focus on the moment and
avoid interruptions.

  • Sunny Mountain Blue
  • Huaxia Red

  • Sycamore Ash

Peerless screen
more than big


The external screen adopts a 6.53-inch 2 ,
120Hz E5 super-sensitive micro-curved screen.

The inner screen adopts 8.03-inch 2 4:3.55 golden
ratio , 2K+ 120Hz E5 LTPO super-sensing folding
giant screen, ultra-high display effect and color accuracy.

32.4 % Reduced power consumption

  • UTG super tough glass

    High light transmission, strong pressure resistance

     
  • LTPO Adaptive Refresh 3

    Intelligently adjust the refresh rate according to the scene

     
  • FrameShare Ultra HD Certification

    Full of details, great to see

     
  • HDR10+ certified

    High dynamic range, the picture is more gorgeous

 

Superconducting antireflection coating 4

Clearer under complex light sources .

70 % 

Enhanced effect

Superconducting anti-reflective coating

First-class in the industry


3D ultrasound
Dual screen fingerprint

Breaking through the bottleneck of the industry, the industry-leading folding screen fingerprint technology enables the
new upgrade of vivo X Fold+. Say goodbye to side
restraints, reduce accidental touches, and be comfortable and convenient. Flagship unlocked, as it
should be.

Hassle-free folding
Flatten like a mirror

First-class in the industry

aerospace grade
Hassle-free hinge

With the six-layer aerospace material, there is more UTG super tough glass, high rebound torque, better screen recovery, shallower  and narrower "invisible crease" 5 , more durable bending life, more smooth and easy opening and closing feel.

 

 

Zirconium alloy floating middle plate

Zirconium alloy floating middle plate, one rise and one fall, greatly improve the crease, and the crease
depth is less than 0.12mm. 6 The screen floats up to support the screen when unfolded, sinks to avoid squeezing when folded, and the inner screen is reliably protected between floating.


Crease depth

Six heavy
aerospace grade materials

 

 

  • 01 

    Liquid metal zirconium alloy

  • 02 

    Titanium alloy

  • 03 

    301 hand tearing steel sheet

  • 04 

    FS53 Aviation Steel

  • 05 

    carbon fiber

  • 06 

    18Ni250

 

Fold without compromise
Breakthrough in performance

a strong core

Folding true flagship, Snapdragon 8+ flagship chip,
stronger performance and lower power consumption.

 

 

4nm
TSMC process technology

GPU|CPU

Snapdragon 8+ mobile platform

Snapdragon 8 Mobile Platform

30 % 

Reduced power consumption8


GPU|CPU

Snapdragon 8+ mobile platform

Snapdragon 8 Mobile Platform

 

10 % 

Comprehensive boost 8


  • AnTuTu 7

    1.1 million

    Flagship benchmark

  • Arm
    Cortex-X2

    3.2GHz super core

  • Dual 5G Dual SIM Dual Pass

    Improved communication capabilities


Folding screen debut
dual 5G dual card dual pass 9

Continuous talk, continuous network, no missed connection

 

  •  Dual 5G Dual SIM Dual Pass

    Dual 5G dual-card dual-pass, online calls are correct, and dual-card incoming calls are not missed.
    Important calls and text messages are not missed; games and files are continuously transferred to the Internet, and the
    signal is high-speed and stable at critical moments.

     

  •  Full scene signal AI enhancement

    Effective identification of weak signal scenarios, special optimization enhancements, and
    smooth communication on elevators, subways and high-speed trains.

privacy security

Full privacy protection
Re-create excellence

On top of the performance explosion, it also cooperates with Qualcomm to customize the development of the
SPU security processing unit, giving the product hardware-level
security protection capabilities.

Qualcomm SPU
chip-level security guard

Qualcomm Snapdragon 8+ has a built-in SPU security processing unit
to provide hardware-level protection for privacy.

incognito mode

Turn off the camera, microphone and positioning with one click
to prevent privacy leakage.

Atomic Privacy System

The atomic privacy system has
four features: local storage, incognito browsing, data isolation, and background protection.

Qianjing
Security Architecture

Based on the Qianjing security architecture, it
provides security protection for chips, kernels, systems and applications at all levels, and the entire link is strictly guarded and always at ease.

Dual battery

Endurance strength
beyond imagination

  • 80W 10

    Dual battery flash charge

  • 50W 11

    Wireless Flash Charge

  • Charge to 70% in as fast as 18 minutes

    and 100% in 35 minutes 12

  • Equivalent 4730mAh 13

    voyage large battery

  • Independent protection circuit x 4

 

Gallium Nitride PD Dual Port Charger14

Charge two devices at the same time

Wide-area superconducting nano-cooling system

The heat dissipation system covers the main heat sources such as the screen, CPU, and battery compartment in an all-round way, creating an extraordinary heat dissipation
effect, achieving long battery life and high performance.

Gundam

27217 mm 2

Cooling area

 

Fold and enjoy
Innovation keeps on hover

Multi-angle hover 15
Innovative experience

Hover up the vivo X Fold+ to free
your hands: watch videos, exercise with tutorials, and
take with new poses.

Hover experience

  • Hover video call upgrade

    During corporate WeChat, QQ, DingTalk, etc.* video calls, the phone is folded into a
    hovering state and placed in a quiet place, the upper half of the screen can display the video call content, and
    the lower half of the screen can be clicked to control mute, share (not supported by QQ) and other operations. Free
    hands, take notes, organize documents, and interact with body language
    more conveniently.

  • Hover to watch

 

*In addition to QQ and DingTalk for video calls, new applications such as corporate WeChat have been added. The clarity of the video screen is mainly based on the actual APP experience.

 

 

*Added adaptations: i Video, Migu Video, Mango TV, CCTV Video, CCTV, Huya, Douyu, Daily Yoga, Chaos.

Big screen experience

X Fold+ is now compatible with 5000+ APPs, and
200+ APPs fit into the folded form, which can meet 90% of the
daily . Simultaneously launched the adaptive engine
1.0, which automatically adapts to three-party applications, and supports the WPS
speaker mode, so that mobile phones can also cast speeches.

One-screen multi-purpose
handy

  • app split screen

    When the app is on a large screen, three-finger swipe up to easily
    split the app. It is clear at a glance.

  • sidebar window

  • Split screen double small windows

  • Big screen finance

mobile office

Folding efficiency office

vivo X Fold+, your mobile office station. Meetings, schedules, documents... Support split-screen multi-task
display , professional and efficient office capabilities, allowing you to calmly
deal with every challenge.

  • Amber Documentation

    Take documents, get documents, take documents, get documents.

  • WeChat tablet mode

  • focus mode

  • Quantum Kit

  • PC/MAC computer cross-screen interconnection, real-time synchronization of multiple devices,
    direct drag and drop of files and photos, to realize document transmission and editing across devices.

    Quantum Kit official website: quantumkit.vivo.com


ZEISS Professional Imaging
Full focal length flagship quad camera


Zeiss optics

The picture is purer when shooting night scenes, and the distortion is smaller when shooting landscapes with wide angles.

ZEISS T* Coating

Effectively reduce stray light and ghosting, pure and clear better than ever.

Zeiss
Four cameras at all focal lengths

  • 50-megapixel
    super-bottom main camera

    1/1.57" outsole

    OIS optical image stabilization

    f/1.75 large aperture

  • 60x
    periscope super telephoto

    60x long zoom

    OIS optical image stabilization

    Easily zoom in on distant scenery

  • 48-megapixel
    114° ultra-wide-angle main camera

    114 degree ultra-low distortion design

  • Professional portrait lens

    47mm equivalent focal length

Hover to shoot

Hover Innovation Experience
Photography is more exciting

Hover the vivo X Fold+ to shoot the experience, free
your hands, and take pictures with new poses.

 

 

Hover to release hands

Hover and place the mobile phone, not afraid of hand shaking, and liberate the creativity of images.

External screen preview help

Someone else shoots for you, and you can easily preview it.

Rear easy selfie

Rear Selfie, external screen preview, high-quality Selfie can be easily done.

see far

It can bring distant scenery closer, and supports up to
60x long zoom. 17

  • 0.6X

  • 1X

  • 5X

  • 30X


Zeiss Super Night View

Super backlight pure night scene

Thanks to the Zeiss T* coating, anti-glare, effectively reduce ghosting, and
harvest pure night.


 

polar night video

Even in extremely dark environments, clear night scenes can be captured.

Zeiss lens bag

The night scene portrait is bright and soft, and you can also use the Zeiss classic lens package, and you can
get large portraits with one click. It is not a problem to take a big group photo, with the help of the
textured portrait group photo function, everyone can make a high-definition appearance.

  • Zeiss Planar Style Bokeh

ZEISS Planar 2.8/80

ZEISS Sonnar 2.8/180

ZEISS Distagon 2.0/28

ZEISS Biotar 1.5/75

Good sound to wake up the ears

Stereo dual speakers, combined with Hi-Fi chip, create full and layered surround sound,
no matter whether it is headphones or external speakers, good sound quality is always close to your ears.

generalist have everything

Infrared remote control

Sanmai movie-level recording

barometer

NFC

Product color

 

 

9e776c460a592b22a70c7af0687d8204.png

 

 

Huaxia Red

Sunny Mountain Blue

Sycamore Ash

Physical Specifications
Height: 162.01mm

Width: 74.47mm (folded)
144.87mm (unfolded)
Thickness: 14.57~14.91mm (folded)
6.28~7.40mm (unfolded)

Weight: 311g

 

9df37438cebadbf5bb0167fb9395fdb2.png

 

 


Full Netcom (V2229A):
processor
CPU model
1st Generation Snapdragon 8+ Mobile Platform

Number of CPU cores

Octa-core processor

CPU frequency

3.2GHz×1+2.75GHz×3+2.0GHz×4

CPU bits

64 bit

CPU process

4nm

GPU (graphics processing unit) model

Adreno 730

 

storage
Running memory (RAM)

12GB (As the mobile phone system and pre-installed programs occupy part of the storage space, the actual storage space is less than 12GB)

On-body storage (ROM)

256GB/512GB (Because the mobile phone system and pre-installed programs occupy part of the storage space, the available storage space is less than 256GB/512GB)

RAM type

LPDDR5 Quad Channel

ROM type

UFS3.1

 

battery information
battery capacity

*This product adopts dual battery series design:
Typical capacity: 2365mAh (3.89V) dual battery, equivalent to 4730mAh (3.89V) single battery.
Typical energy: 18.39Wh
Rated capacity: 2300mAh (3.89V) dual battery, equivalent to 4600mAh (3.89V) single battery.
Rated energy: 17.89Wh 

Charging Specifications

80W Flash Charge & 50W Wireless Charge

Battery Type

lithium battery

OTG reverse charging

yes

Theoretical standby time

Theoretical 4G single card standby time: up to 14.2 days.
Theoretical 4G Volte talk time: up to 16.6 hours.
Remarks: The data are the test results under the standard environment of our laboratory. The actual standby time varies depending on the actual local network conditions and usage habits.

 

screen display
Dimensions (inches)

Inner screen: 8.03 inches / Outer screen: 6.53 inches\

screen ratio

Inner screen: 4:3.55 / Outer screen: 21:9

screen front panel coverage

Internal screen: 89.45% / External screen: 88.75%

Resolution

Inner screen: 2160 × 1916 / Outer screen: 2520 × 1080

screen color

16.7 million colors

HDR technology

yes

Contrast

8000000:1

screen material

AMOLED

touch screen

Capacitive multi-touch

refresh rate

Internal screen: 120Hz
External screen: 120/60Hz

 

 

Camera
front camera pixels

16 million pixels

Front camera aperture

f/2.45

Number of rear cameras

4

rear camera pixels

50-megapixel OIS main camera with ultra-large bottom (OIS image stabilization, f/1.75 aperture) 48-megapixel 114° ultra-wide-angle main camera (114-degree ultra-low distortion design, f/2.2 aperture) 12-megapixel professional portrait camera (47mm equivalent) focal length, f/1.98 aperture) 8 million pixel OIS periscope super telephoto (5x optical zoom, 60x super zoom, OIS anti-shake)

rear camera aperture

f/1.75 (50-megapixel OIS ultra-large bottom main camera), f/2.2 (48-megapixel 114° ultra-wide-angle main camera), f/1.98 (12-megapixel professional portrait camera), f/3.4 (8-megapixel OIS latent camera) telephoto lens)

rear flash

yes

sensor

CMOS

Anti-shake type

Both the rear super-large bottom main camera and the periscope super telephoto support OIS image stabilization, and all rear lenses support video image stabilization.

auto focus

All four rear cameras support AF autofocus

zoom mode

The rear supports 5x optical zoom and 60x super zoom

Shooting mode

Front: night scene, portrait, photo, video, dynamic photo, etc.
Rear: high pixel, night scene, portrait, photo, video, professional, panorama, dynamic photo, slow motion, time-lapse photography, smart vision, super moon, super clear Documents, starry sky, sports snapshot, time slow door, dual-view video, super group photo, etc.

Video recording format

MP4

video recording

Supports up to 8K ultra-high-definition video shooting
Slow motion up to 1080P shooting

 

Network parameters
Network Type

Support mobile/Unicom/Telecom 5G/4G and other networks, SA & NSA 5G dual-mode
Note: SA support capability depends on the available network and software version.

network frequency

2G GSM: 850/900/1800/1900MHz;
2G CDMA: BC0/BC1;
3G WCDMA: B1/B2/B4/B5/B6/B8/B19;
4G FDD-LTE: B1/B2/B3/B4/B5/ B7/B8/B12/B17/B18/B19/B20/B25/B26/B28/B32/B66;
5G SA: n1/n2/n3/n5/n7/n8/n12/n20/n28/n66/n38/n40 /n41/n77/n78/n79;
5G NSA: n38/n41/n77/n78/n79;

SIM card type

dual nano

Instructions for using dual cards

1. Card slots 1 and 2 can be arbitrarily switched to data cards;
2. Support SA/NSA dual-mode 5G (5G services can only be used with operator network support);
3. If the data card is a China Mobile or China Unicom card, not a data card Support "Mobile 5G/4G/2G, Unicom 5G/4G/3G/2G, Telecom 2G/4G 5G (VoLTE service needs to be activated)";
4. If the data card is a telecom card, the non-data card supports "Mobile 5G/4G/ 2G, Unicom 5G/4G/3G/2G, Telecom 5G/4G (VoLTE service needs to be activated, if VoLTE service is not activated, the network cannot be registered)”.

 

music and sound
Hi-Fi

 yes

music player

AAC, AMR, MIDI, OGG, FLAC, WMA, WAV, APE, MP3

MP3 Ringtones

yes

recording

yes

 

 

Fingerprint recognition
screen fingerprint

yes

face recognition

yes

 

operating system

Jovi

OriginOS Ocean based on Android 12.0

Support voice, Jovi homepage, smart vision, Jovi InCar (smart car) and other functions

 

Data Connections
WLAN

Support frequency band WLAN 2.4G, WLAN 5G; support functions include Wi-Fi Display, 2*2 MIMO, 2.4G&5G dual-channel concurrent, MU-MIMO, Wi-Fi 6.

Wi-Fi hotspot

yes

Bluetooth transmission

Support Bluetooth 5.2

Bluetooth Audio Specifications

SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC

Bluetooth Apt-X

OTG

USB interface type

Type-C

USB version

USB3.2 Gen1

DP screen projection

yes

Headphone jack standard

Type-C

navigation

Support (including Beidou/GPS/GLONASS/Galileo/QZSS/NavIC)

NFC

yes

cloud service

yes

FM function

no

 

sensor
Accelerometer

yes

Ambient light sensor

yes

Proximity sensor

yes

Gyro

yes

Electronic compass

yes

other sensors

Physical gyroscope, Laser focus sensor, air pressure sensor, hall sensor, color temperature sensor, infrared remote control

 

Built-in application
social contact

Film and television music

Common tools

infotainment

Life

Built-in application notes

Sina Weibo

Tencent Video, Himalaya

App Store, iMusic, iTheme, iManager, File Management, Game Center, Cloud Service, Mutual Transfer

e-book

AutoNavi Map, Ctrip, Dianping

The above built-in application list is for reference only, please refer to the actual built-in application.

  • The screen refresh rate is 60Hz by default, and the refresh rate is automatically switched according to the scene to reduce power consumption. You can go to the system settings to choose the smart switch, 60Hz or 120Hz mode.
  • The screen size is the length of the diagonal diagonal of the screen measured according to a standard rectangle, and the actual viewable area is slightly smaller.
  • "LTPO adaptive refresh rate intelligently adjusts the refresh rate according to the scene, reducing power consumption by 47.4%" means that compared to 120Hz, 1Hz scene LTPO can save up to 47.4% of power consumption.
  • The anti-reflection effect of superconducting anti-reflection coating is increased by 70%. The data of anti-reflection effect is compared with that of ordinary AF coating, and the data comes from vivo laboratory.
  • Hidden creases do not mean that there are no creases at all. It is normal for creases to occur with various factors such as the use environment and use time.
  • The data comes from the Rhein Lab.
  • The running score data comes from vivo laboratory, using 12GB+512GB version mobile phone, and obtained through the test of AnTuTu version 9.2.7; the actual may vary due to different test environments, test software, etc.
  • Compared with the Snapdragon 8 mobile platform, the data comes from Qualcomm official. The improvement specifically refers to a 10% increase in CPU performance and a 10% increase in GPU frequency.
  • The dual-card dual-pass function depends on the operator's 5G VoNR deployment and subsequent software upgrade support, and operators can be consulted in different regions. The network and call conditions may vary due to environmental and operator factors, please refer to the actual use.
  • vivo X Fold+ mobile phone is equipped with the official standard charger + data cable (flash charging power adapter 20V/4A MAX), which can support up to 80W flash charging; the actual charging power will be dynamically adjusted with the scene changes, please refer to the actual usage .
  • With the product's official wireless charging stand + standard charger + data cable, the vivo X Fold+ mobile phone can support up to 50W wireless flash charging when the mobile phone is in the state of bare metal folding; the actual charging power will be dynamically adjusted with the scene changes, please use the actual The usage shall prevail. Wireless charging stand sold separately.
  • Ambient and mobile phone temperature 25℃±1℃, test conditions: when the battery power of the mobile phone is 1%, other mobile phone services and functions except calls are turned off, and when the bare metal is unfolded and the screen is turned off, it is charged with the official standard charger of the product + data cable ; Actual data may vary due to different test environments, different user charging scenarios, different initial charging temperatures of mobile phones, and long-term battery wear and tear.
  • The 4730mAh battery capacity that appears on all pages is equivalent capacity, and this product adopts a dual-battery series design. Typical capacity: 2365mAh (3.89V) dual battery, equivalent to 4730mAh (3.89V) single battery. Typical energy: 18.39Wh. Rated capacity: 2300mAh (3.89V) dual battery, equivalent to 4600mAh (3.89V) single battery. Rated energy: 17.89Wh.
  • The device that needs to be charged also supports the corresponding charging protocol, and the protocol matching can trigger the corresponding fast charging.
  • The product unfolds from the closed state and supports hovering from 60 degrees to 120 degrees.
  • It is only displayed on the interactive page and does not represent investment advice.
  • It supports up to 60x super zoom, and the sample shows the effect of 30x zoom.
  • The appearance diagram, internal structure diagram and product effect of the mobile phone on the page are for reference only. In fact, there may be differences in details such as color and silk screen due to different lighting conditions and production batches. Please refer to the actual product.
  • The data and parameters on the above pages are the test results under the standard environment of our laboratory. The actual situation of the data and parameters (for example: aperture parameters) may vary slightly depending on the test environment, test software, and supplier material batches.
  • The above sample materials are shot with vivo X Fold, which is consistent with the functions of vivo X Fold+. The sample effect is for reference only. The pixels of different shooting modes may be different. Some sample sizes have been cropped. Please refer to the actual experience for the specific shooting effect.
  • Since some specifications, parameters, parts, and appearance details of the product (for example, whether the battery cover has silk screen printing) may change due to supplier replacement or production batch, vivo will update the description on the page in real time according to the adjustment, please Closer look.
  • This machine has been equipped with a special protective film for screen fingerprints when it leaves the factory. Do not use other third-party protective films to avoid affecting the fingerprint recognition effect or causing other security risks. If you need to replace it, please go to the vivo customer service center or experience center.
  • ZEISS, the ZEISS logo, and T*, are registered trademarks of Carl Zeiss.

 

Questions (0)

No customer questions for the moment.

Only registered user can ask a question. Login