Vivo X21i
| Type | Touch |
| Dimensions | 154.37 x 74.98 x 6.99 mm |
| Weight | 159.00 g |
| Display size | 6.28" |
| Display | Color / Super AMOLED 16M colors 1080 x 2280 px (6.28") 402 ppi |
| Display protection |   |
| Additional display | |
| Protection of the secondary display | |
| Standard battery | Li-Ion 3240 mAhBuy powerbank
|
| Quick battery charging | |
| Wireless battery charging | |
| Internal memory | 64 GB, 128 GB |
| RAM memory | 4 GB, 6 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 256 GBBuy memory card |
| Operating system | Android 8.1 Oreo |
| Interface | Funtouch 4.0 |
| Processor | MediaTek Helio P60 MT6771 |
| Processor clock | 2000 MHz |
| GPU | ARM Mali-G72 MP3 @800 MHz |
| Touchscreen | |
| DualSIM | |
| DualSIM mode | dual standby |
| Announced | 2Q 2018 |
| Other names | - |
| GSM frequencies | 850 900 1800 1900 |
| UMTS | 850 900 2100 |
| LTE standard | FDD LTE: 2100, 1800, 1700, 900, 850 TDD LTE: 2600, 2500, 2300, 1900 |
| CDMA | 850 |
| Standard TD-SCDMA | 1900 2000 |
| UMA | |
CAMERAS - BACK
| First camera | |
| Photo matrix | 12 Mpx |
| Optical zoom | |
| Flash | LED |
| Dual-colour LED flash | |
| Video formats | MPEG4, H.263, H.264 |
| Additional | - |
| Second camera | |
| Photo matrix | 5 Mpx |
| Optical zoom | |
| Flash | LED |
| Dual-colour LED flash | |
| Video formats | MPEG4, H.263, H.264 |
| Additional | - |
CAMERAS - FRONT
| First camera | |
| Photo matrix | 24 Mpx |
| Optical zoom | |
| Flash | |
| Dual-colour LED flash | |
| Video formats | MPEG4, H.263, H.264 |
| Additional | - |
SENSORS
| Accelerometer | |
| Proximity | |
| Light | |
| Magnetometer | |
| Gyroscope | |
| Barometer | |
| Altimeter | |
| Gravity | |
| Hall-effect | |
| Iris scanner | |
| Fingerprint scanner | |
| Thermometer | |
| Hygrometer | |
Data transfer
| xHTML | |
| WAP | v2.0 |
| HSCSD | |
| HSDPA | |
| HSUPA | |
| HSPA | |
| HSPA+ | |
| LTE DL | |
| LTE UP | |
| WIMAX+ | |
| GPRS | |
| EDGE | |
| Bluetooth | |
| A2DP Profile | |
| HDMI | |
| WiFi | |
| WiFi frequencies | 2,4 GHz |
| DLNA | |
| Miracast | |
| WiFi hotspot | |
| IrDA | |
| USB | v2.0 |
| GPS | |
| A-GPS | |
| Beidou | |
COMMUNICATION AND MESSAGING
| Call waiting | |
| Conferency | |
| Call forwarding | |
| Push To Talk | |
| Instant Messenger | |
| SMS | |
| EMS | |
| MMS | |
| Dictionary | XT9 |
| Swype | |
| e-mail client | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | |
| RSS Reader | |
Multimedia
| MP3 | |
| Stereo speakers | |
| Audio Jack | 3.5 mm |
| HD Voice | |
| Sound formats | AAC, AMR, APE, FLAC, OGG, WAV, WMA |
| Polyphony | |
| Video ringtone | |
| Ring composer | |
| Java | ART |
| Videophone | |
| DVB-H television | |
| TV-Out | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | |
| Stopwatch | |
| Alarm | |
| Calculator | |
| Currency converter | |
| Organizer | |
| Calendar | |
| Flight mode | |
| SyncML | |
| Data and fax | |
| Screensaver | |
| Themes | |
| Interchangeable covers | |
| Voice dial | |
| Speakerphone | |
| Recorder | |
| Vibrations | |