Product
Xiaomi Mi 4s
Xiaomi Mi 4s
Apple iPhone 4s
Apple iPhone 4s
Battery
Charging 18W wired, QC2, 40% in 60 min -
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type Li-Ion 3260 mAh, non-removable Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build - Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 139.3 x 70.8 x 7.8 mm (5.48 x 2.79 x 0.31 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 133 g (4.69 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 No No
USB USB Type-C 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, hotspot
Display
Protection - Corning Gorilla Glass, oleophobic coating
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2016, February. Released 2016, March 2011, October 04. Released 2011, October 14
Status Discontinued Discontinued
Main Camera
Features Dual-LED dual-tone flash, panorama, HDR 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, 720p@120fps 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) No
Internal 64GB 3GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  eMMC 5.0 -
Misc
Colors Black, White, Gold, Pink Black, White
Models - A1431, A1387, iPhone4,1
SAR - 1.18 W/kg (head)     0.98 W/kg (body)    
SAR EU - 0.99 W/kg (head)     0.99 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 -
Speed HSPA, LTE Cat4 150/50 Mbps HSPA 14.4/5.76 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / EVDO
  TD-SCDMA CDMA2000 1xEV-DO
Our Tests
Audio quality Noise -94.9dB / Crosstalk -82.6dB -
Battery (old) Endurance rating 75h -
Camera Photo / Video -
Display Contrast ratio: 975:1 (nominal), 2.095 (sunlight) -
Loudspeaker Voice 73dB / Noise 68dB / Ring 82dB -
Performance Basemark OS II 2.0: 1545Basemark X: 12990 -
Platform
Chipset Qualcomm MSM8992 Snapdragon 808 (20 nm) Apple A5 (45 nm)
CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57) Dual-core 1.0 GHz Cortex-A9
GPU Adreno 418 PowerVR SGX543MP2
OS Android 5.1 (Lollipop), upgradable to 7.0 (Nougat), MIUI 10 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Single 5 MP, f/2.0 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