Product
Xiaomi Redmi Note 9 Pro
Xiaomi Redmi Note 9 Pro
Apple iPhone 4s
Apple iPhone 4s
Battery
Charging 30W wired -
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type Li-Po 5020 mAh Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 165.8 x 76.7 x 8.8 mm (6.53 x 3.02 x 0.35 in) 115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in)
SIM Nano-SIM + Nano-SIM Micro-SIM
Weight 209 g (7.37 oz) 140 g (4.94 oz)
  - Scratch-resistant glass back panel
Comms
Bluetooth 5.0, A2DP, LE 4.0, A2DP, LE
Infrared port Yes -
NFC Yes -
Positioning GPS, GLONASS, GALILEO, BDS GPS, A-GPS, GLONASS
Radio FM radio, recording No
USB USB Type-C 2.0, OTG 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 Corning Gorilla Glass, oleophobic coating
Resolution 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 6.67 inches, 107.4 cm2 (~84.5% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (side-mounted), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2020, April 30 2011, October 04. Released 2011, October 14
Status Available. Released 2020, May 05 Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Quad 64 MP, f/1.9, 26mm (wide), 1/1.72", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.4, (macro), AF 2 MP, f/2.4, (depth) -
Single - 8 MP, f/2.4, 35mm (standard), 1/3.2", 1.4µm, AF
Video 4K@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  UFS 2.1 -
Misc
Colors Tropical Green, Glacier White, Interstellar Gray Black, White
Models M2003J6B2G A1431, A1387, iPhone4,1
SAR 0.87 W/kg (head)     0.71 W/kg (body)     1.18 W/kg (head)     0.98 W/kg (body)    
SAR EU 0.66 W/kg (head)     1.02 W/kg (body)     0.99 W/kg (head)     0.99 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 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 -
Speed HSPA, LTE HSPA 14.4/5.76 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO
  - CDMA2000 1xEV-DO
Our Tests
Battery (old) Endurance rating 123h -
Camera Photo / Video -
Display Contrast ratio: 1285:1 (nominal) -
Loudspeaker -28.6 LUFS (Average) -
Performance AnTuTu: 279625 (v8) GeekBench: 1785 (v5.1) GFXBench: 15fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SM7125 Snapdragon 720G (8 nm) Apple A5 (45 nm)
CPU Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) Dual-core 1.0 GHz Cortex-A9
GPU Adreno 618 PowerVR SGX543MP2
OS Android 10, MIUI 11 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Features HDR, panorama -
Single 16 MP, f/2.5, (wide), 1/3.06", 1.0µm VGA, videocalling over Wi-Fi and 3G
Video 1080p@30/120fps 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