Product
Vivo X51 5G
Vivo X51 5G
Apple iPhone X
Apple iPhone X
Battery
Charging 33W wired, 57% in 30 min 15W wired, PD2.0, 50% in 30 minWireless (Qi)
Talk time - Up to 21 h (3G)
Type 4315 mAh Li-Ion 2716 mAh, non-removable (10.35 Wh)
Body
Build Glass front, glass back, aluminum frame Glass front (Corning-made glass), glass back (Corning-made glass), stainless steel frame
Dimensions 158.5 x 72.8 x 8 mm (6.24 x 2.87 x 0.31 in) 143.6 x 70.9 x 7.7 mm (5.65 x 2.79 x 0.30 in)
SIM Nano-SIM + Nano-SIM Nano-SIM
Weight 181.5 g (6.42 oz) 174 g (6.14 oz)
  - IP67 dust/water resistant (up to 1m for 30 min)Apple Pay (Visa, MasterCard, AMEX certified)
Comms
Bluetooth 5.1, A2DP, LE, aptX HD 5.0, A2DP, LE
NFC Yes Yes
Positioning GPS, GLONASS, GALILEO, BDS GPS, GLONASS, GALILEO, QZSS
Radio No No
USB USB Type-C 2.0, OTG Lightning, USB 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot
Display
Protection - Scratch-resistant glass
Resolution 1080 x 2376 pixels (~398 ppi density) 1125 x 2436 pixels, 19.5:9 ratio (~458 ppi density)
Size 6.56 inches, 104.6 cm2 (~90.6% screen-to-body ratio) 5.8 inches, 84.4 cm2 (~82.9% screen-to-body ratio)
Type AMOLED, 90Hz, HDR10+ Super Retina OLED, HDR10, Dolby Vision, 625 nits (HBM)
  - 3D Touch
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Face ID, accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2020, October 21 2017, September 12. Released 2017, November 03
Status Available. Released 2020, October 23 Discontinued
Main Camera
Dual - 12 MP, f/1.8, 28mm (wide), 1/3.0", 1.22µm, dual pixel PDAF, OIS12 MP, f/2.4, 52mm (telephoto), 1/3.4", 1.0µm, PDAF, OIS, 2x optical zoom
Features Laser AF, color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama Quad-LED dual-tone flash, HDR (photo/panorama), panorama, HDR
Quad 48 MP, f/1.6, (wide), PDAF, gimbal OIS 8 MP, f/3.4, 135mm (periscope telephoto), 1/4.0", PDAF, OIS, 5x optical zoom 13 MP, f/2.5, 50mm (telephoto), 1/2.8", 0.8µm, PDAF, 2x optical zoom 8 MP, f/2.2, 120˚, 16mm (ultrawide), 1/4.0", 1.12µm -
Video 4K@30fps, 1080p@30fps, gyro-EIS 4K@24/30/60fps, 1080p@30/60/120/240fps
Memory
Card slot No No
Internal 256GB 8GB RAM 64GB 3GB RAM, 256GB 3GB RAM
  UFS 2.1 NVMe
Misc
Colors Gray Space Gray, Silver
Models XE710 A1865, A1901, A1902, A1903, iPhone10,3, iPhone10,6
SAR - 1.09 W/kg (head)     1.17 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 66 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 34, 38, 39, 40, 41, 66
5G bands 1, 3, 7, 8, 28, 38, 41, 77, 78 SA/NSA -
Speed HSPA, LTE, 5G HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 Mbps, EV-DO Rev.A 3.1 Mbps
Technology GSM / CDMA / HSPA / LTE / 5G GSM / HSPA / LTE
  CDMA 800 -
Platform
Chipset Qualcomm SM7250 Snapdragon 765G 5G (7 nm) Apple A11 Bionic (10 nm)
CPU Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver) Hexa-core 2.39 GHz (2x Monsoon + 4x Mistral)
GPU Adreno 620 Apple GPU (three-core graphics)
OS Android 10, Funtouch 10.0 iOS 11.1.1, up to iOS 16.7.7
Selfie camera
Features HDR HDR
Single 32 MP, f/2.5, 26mm (wide), 1/2.8", 0.8µm 7 MP, f/2.2, 32mm (standard)SL 3D, (depth/biometrics sensor)
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack No No
Loudspeaker Yes Yes, with stereo speakers
  32-bit/192kHz Hi-Res audio -
Tests
Audio quality - Noise -93.7dB / Crosstalk -82.8dB
Battery (old) - Endurance rating 74h
Camera - Photo / Video
Display - Contrast ratio: Infinity (nominal), 5.013 (sunlight)
Loudspeaker - Voice 68dB / Noise 74dB / Ring 76dB
Performance - AnTuTu: 233100 (v7)GeekBench: 10215 (v4.4)GFXBench: 28fps (ES 3.1 onscreen)