Product
Xiaomi Redmi 3
Xiaomi Redmi 3
Apple iPhone 4s
Apple iPhone 4s
Battery
Charging 10W wired -
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type Li-Ion 4100 mAh, non-removable Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build Glass front, aluminum back, aluminum frame Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 139.3 x 69.6 x 8.5 mm (5.48 x 2.74 x 0.33 in) 115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in)
SIM Nano-SIM + Micro-SIM Micro-SIM
Weight 144 g (5.08 oz) 140 g (4.94 oz)
  - Scratch-resistant glass back panel
Comms
Bluetooth 4.1, A2DP 4.0, A2DP, LE
Infrared port Yes -
NFC No -
Positioning GPS, GLONASS, BDS GPS, A-GPS, GLONASS
Radio FM radio No
USB microUSB 2.0 2.0
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, hotspot
Display
Protection - Corning Gorilla Glass, oleophobic coating
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 5.0 inches, 68.9 cm2 (~71.1% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2016, January. Released 2016, January 2011, October 04. Released 2011, October 14
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single 13 MP, f/2.0, PDAF 8 MP, f/2.4, 35mm (standard), 1/3.2", 1.4µm, AF
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) No
Internal 16GB 2GB RAM, 32GB 3GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  eMMC 4.5 -
Misc
Colors Gold, Dark Gray, Silver, Classic Gold Black, White
Models 2015816 A1431, A1387, iPhone4,1
SAR 0.90 W/kg (head)     0.56 W/kg (body)     1.18 W/kg (head)     0.98 W/kg (body)    
SAR EU 1.33 W/kg (head)     0.99 W/kg (head)     0.99 W/kg (body)    
Network
2G bands GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 -
Speed HSPA, LTE, EV-DO Rev.A 3.1 Mbps HSPA 14.4/5.76 Mbps
Technology GSM / CDMA / HSPA / EVDO / LTE GSM / CDMA / HSPA / EVDO
  CDMA2000 1xEV-DO CDMA2000 1xEV-DO
Our Tests
Battery (old) Endurance rating 107h -
Camera Photo / Video -
Platform
Chipset Qualcomm MSM8939v2 Snapdragon 616 (28 nm) Apple A5 (45 nm)
CPU Octa-core (4x1.5 GHz Cortex-A53 & 4x1.2 GHz Cortex-A53) Dual-core 1.0 GHz Cortex-A9
GPU Adreno 405 PowerVR SGX543MP2
OS Android 5.1 (Lollipop), MIUI 7 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Single 5 MP, f/2.2 VGA, videocalling over Wi-Fi and 3G
Video 1080p@30fps 480p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
Tests
Audio quality - Noise -91.2dB / Crosstalk -93.0dB
Battery (old) - Endurance rating 45h
Camera - Photo / Video
Display - Contrast ratio: 1261:1 (nominal) / 2.269:1 (sunlight)
Loudspeaker - Voice 65dB / Noise 64dB / Ring 74dB