Product
Vivo X21 UD
Vivo X21 UD
₹56,038
Apple iPhone 6 Plus
Apple iPhone 6 Plus
₹71,500
Battery
Charging 18W wired -
Stand-by - Up to 384 h (3G)
Talk time - Up to 24 h (3G)
Type Li-Ion 3200 mAh, non-removable Li-Po 2915 mAh, non-removable (11.1 Wh)
Body
Build Glass front (Gorilla Glass 3), aluminum back, aluminum frame Glass front (Corning-made glass), aluminum back, aluminum frame
Dimensions 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) 158.1 x 77.8 x 7.1 mm (6.22 x 3.06 x 0.28 in)
SIM Nano-SIM + Nano-SIM Nano-SIM
Weight 156.2 g (5.50 oz) 172 g (6.07 oz)
  - Apple Pay (Visa, MasterCard, AMEX certified)
Comms
Bluetooth 5.0, A2DP, LE 4.0, A2DP, LE
NFC No Yes (Apple Pay only)
Positioning GPS, GLONASS GPS, GLONASS
Radio FM radio No
USB microUSB 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 Corning Gorilla Glass 3 Ion-strengthened glass, oleophobic coating
Resolution 1080 x 2280 pixels, 19:9 ratio (~402 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~67.8% screen-to-body ratio)
Type Super AMOLED IPS LCD
Features
Sensors Fingerprint (under display, optical), accelerometer, proximity, compass Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2018, March. Released 2018, March 2014, September 09. Released 2014, September 19
Status Discontinued Discontinued
Main Camera
Dual 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF 5 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama Dual-LED dual-tone flash, HDR
Single - 8 MP, f/2.2, 29mm (standard), 1/3.0", 1.5µm, PDAF, OIS
Video 1080p@30fps 1080p@60fps, 720p@240fps
Memory
Card slot microSDXC (uses shared SIM slot) No
Internal 128GB 6GB RAM 16GB 1GB RAM, 64GB 1GB RAM, 128GB 1GB RAM
  eMMC 5.1 -
Misc
Colors Black, Ruby Red Space Gray, Silver, Gold
Models X21UD A A1522, A1524, iPhone7,1
SAR - 1.19 W/kg (head)     1.19 W/kg (body)    
SAR EU - 0.99 W/kg (head)     0.91 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - A1522 (GSM), A1522 (CDMA), A1524
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700 / 1900 / 2100 - A1522 (GSM), A1522 (CDMA), A1524
4G bands 1, 2, 3, 5, 8, 34, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29 - A1522 GSM, A1522 CDMA
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps, EV-DO Rev.A 3.1 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  CDMA 800 & TD-SCDMA 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29, 38, 39, 40, 41 - A1524
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Apple A8 (20 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Dual-core 1.4 GHz Typhoon (ARM v8-based)
GPU Adreno 512 PowerVR GX6450 (quad-core graphics)
OS Android 8.1 (Oreo), Funtouch 4 iOS 8, upgradable to iOS 12.5.7
Selfie camera
Features - face detection, HDR, FaceTime over Wi-Fi or Cellular
Single 12 MP, f/2.0, (wide), 1/2.8", 1.28µm 1.2 MP, f/2.2, 31mm (standard)
Video 1080p@30fps 720p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  32-bit/192kHz Hi-Res audio 16-bit/44.1kHz audio
Tests
Audio quality - Noise -94dB / Crosstalk -72dB
Battery (old) - Endurance rating 79h
Camera - Photo / Video
Display - Contrast ratio: 1361 (nominal), 3.023 (sunlight)
Loudspeaker - Voice 67dB / Noise 65dB / Ring 66dB
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