Product
Realme XT
Realme XT
Vivo Y31 (2015)
Vivo Y31 (2015)
Battery
Charging 20W wired -
Type 4000 mAh, non-removable 2100 mAh, removable
Body
Build Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame -
Dimensions 158.7 x 75.2 x 8.6 mm (6.25 x 2.96 x 0.34 in) 137.2 x 68.8 x 8.4 mm (5.40 x 2.71 x 0.33 in)
SIM Nano-SIM + Nano-SIM Dual SIM
Weight 183 g (6.46 oz) 137 g (4.83 oz)
Comms
Bluetooth 5.0, A2DP, LE 4.0, A2DP
NFC No No
Positioning GPS, GLONASS, GALILEO, BDS GPS
Radio FM radio FM radio
USB USB Type-C 2.0 microUSB 2.0
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 Corning Gorilla Glass 5 -
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) 720 x 1280 pixels, 16:9 ratio (~312 ppi density)
Size 6.4 inches, 100.5 cm2 (~84.3% screen-to-body ratio) 4.7 inches, 60.9 cm2 (~64.5% screen-to-body ratio)
Type Super AMOLED IPS LCD
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Accelerometer, proximity, compass
Launch
Announced 2019, September 13. Released 2019, September 2015, September. Released 2015, October
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, HDR
Quad 64 MP, f/1.8, (wide), 1/1.72", 0.8µm, PDAF 8 MP, f/2.3, 13mm (ultrawide) 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Single - 8 MP
Video 4K@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS 720p@30fps
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 4GB RAM, 64GB 6GB RAM, 128GB 8GB RAM 8GB 1GB RAM
  UFS 2.1 -
Misc
Colors Pearl White, Pearl Blue White, Black
Models RMX1921 Y31L, Y31
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 2100
4G bands 1, 3, 5, 8, 38, 40, 41 -
Speed HSPA, LTE HSPA
Technology GSM / HSPA / LTE GSM / HSPA
Our Tests
Audio quality Noise -92.2dB / Crosstalk -91.4dB -
Battery (old) Endurance rating 100h -
Camera Photo / Video -
Display 447 nits max brightness (measured) -
Loudspeaker Voice 68dB / Noise 74dB / Ring 89dB -
Performance AnTuTu: 185193 (v7) GeekBench: 6102 (v4.4) GFXBench: 13fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SDM712 Snapdragon 712 (10 nm) Mediatek MT6580 (28 nm)
CPU Octa-core (2x2.3 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver) Quad-core 1.3 GHz Cortex-A7
GPU Adreno 616 Mali-400MP2
OS Android 9.0 (Pie), upgradable to Android 10, Realme UI Android 5.1 (Lollipop), Funtouch 2.1
Selfie camera
Features HDR, panorama -
Single 16 MP, f/2.0, 25mm (wide), 1/3.06", 1.0µm 2 MP
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes