Product
Oppo F21 Pro 5G
Oppo F21 Pro 5G
Vivo X6S
Vivo X6S
Battery
Charging 33W wired, PD, 31% in 15 min, 100% in 63 min Reverse wired 18W wired
Type Li-Po 4500 mAh Li-Ion 2400 mAh, non-removable
Body
Dimensions 159.9 x 73.2 x 7.5 mm (6.30 x 2.88 x 0.30 in) 147.9 x 73.8 x 6.7 mm (5.82 x 2.91 x 0.26 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Micro-SIM
Weight 173 g (6.10 oz) 140.5 g (4.97 oz)
  IPX4, dust and water resistant RGB ring lights around the cameras (notifications, charging progress) -
Comms
Bluetooth 5.1, A2DP, LE, aptX HD 4.0, A2DP
NFC Yes No
Positioning GPS, GLONASS, BDS, GALILEO, QZSS GPS
Radio No FM radio
USB USB Type-C 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 b/g/n, hotspot
Display
Protection Schott Xensation glass -
Resolution 1080 x 2400 pixels, 20:9 ratio (~409 ppi density) 1080 x 1920 pixels, 16:9 ratio (~424 ppi density)
Size 6.43 inches, 99.8 cm2 (~85.3% screen-to-body ratio) 5.2 inches, 74.5 cm2 (~68.3% screen-to-body ratio)
Type AMOLED, 430 nits (typ), 600 nits (HBM) Super AMOLED
Features
Sensors Fingerprint (under display, optical), accelerometer, proximity, gyro, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2022, April 12 2016, March. Released 2016, April
Status Available. Released 2022, April 21 Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single - 13 MP, f/2.2, PDAF
Triple 64 MP, f/1.7, 26mm (wide), PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC microSDXC (uses shared SIM slot)
Internal 128GB 8GB RAM 64GB 4GB RAM
  UFS 2.2 eMMC 5.1
Misc
Colors Rainbow Spectrum, Cosmic Black, Dawnlight Gold, Starlight Black Silver, Gold, Rose Gold
Models CPH2341, CPH2455 -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 900 / 1800 - SIM 1 & SIM 2
3G bands HSDPA 800 / 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41 1, 3, 4, 38, 39, 40, 41
5G bands 1, 8, 28, 41, 77, 78 SA/NSA -
Speed HSPA, LTE (CA), 5G HSPA, LTE
Technology GSM / HSPA / LTE / 5G GSM / HSPA / LTE
  - TD-SCDMA
Platform
Chipset Qualcomm SM6375 Snapdragon 695 5G (6 nm) Qualcomm MSM8976 Snapdragon 652 (28 nm)
CPU Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) Octa-core (4x1.8 GHz Cortex-A72 & 4x1.4 GHz Cortex-A53)
GPU Adreno 619 Adreno 510
OS Android 12, upgradable to Android 14, ColorOS 14 Android 5.1 (Lollipop), Funtouch 2.5
Selfie camera
Features HDR, panorama -
Single 16 MP, f/2.4, 27mm (wide), 1.0µm 8 MP, f/2.4
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  - 32-bit/192kHz audio