General
- Brand Vivo
- Model X21
- Device Smartphones
- Added November 1, 2018
- Updated June 28, 2024
Launch
- Announced 2018, March
- Status Available. Released 2018, March
Network
- Technology GSM / CDMA / HSPA / LTE
- 2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA
- 3G bands HSDPA 850 / 900 / 1900 / 2100
- 4G bands LTE band 1(2100), 2(1900), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
- Speed HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps
- GPRS Yes
- EDGE Yes
Body
- Dimensions 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
- Weight 156.2 g (5.50 oz)
- Build Front glass, aluminum body
- SIM Hybrid Dual SIM (Nano-SIM, dual stand-by)
Display
- Type Super AMOLED capacitive touchscreen, 16M colors
- Size 6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio)
- Resolution 1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
Platform
- OS Android 8.1 (Oreo)
- Chipset Qualcomm SDM660 Snapdragon 660 (14 nm)
- CPU Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
- GPU Adreno 512
Memory
- Card slot microSD, up to 256 GB (uses SIM 2 slot)
- Internal 64/128 GB
- RAM 6 GB
Main camera
- Dual 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF 5 MP, f/2.4, depth sensor
- Features LED flash, HDR, panorama
- Video 1080p@30fps
Selfie camera
- Single 12 MP, f/2.0
Sound
- Alert types Vibration; MP3, WAV ringtones
- Loudspeaker Yes
- 3.5mm jack Yes - 32-bit/192kHz audio - Active noise cancellation with dedicated mic
Connectivity
- WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
- Bluetooth 5.0, A2DP, LE
- GPS Yes, with A-GPS, GLONASS
- NFC No
- FM radio Yes
- USB microUSB 2.0, USB On-The-Go
Features
- Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass
- Messaging SMS(threaded view), MMS, Email, Push Email, IM
- Browser HTML5
- Java No
Battery
- Type Non-removable Li-Ion
- Capacity 3200 mAh battery
More
- Made by China
- Color Black, Aurora White, Ruby Red
- Other Features Fast battery charging MP4/H.264 player MP3/WAV/eAAC+/FLAC player Document viewer Photo/video editor