Product
Xiaomi Redmi Note 9 5G
Xiaomi Redmi Note 9 5G
Apple iPhone 4s
Apple iPhone 4s
Battery
Charging 18W wired -
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type Li-Po 5000 mAh Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build Glass front (Gorilla Glass 5), plastic back Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 162 x 77.3 x 9.2 mm (6.38 x 3.04 x 0.36 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 199 g (7.02 oz) 140 g (4.94 oz)
  Water-repellent coating Scratch-resistant glass back panel
Comms
Bluetooth 5.1, A2DP, LE 4.0, A2DP, LE
Infrared port Yes -
NFC No -
Positioning GPS, GLONASS, GALILEO, BDS, QZSS GPS, A-GPS, GLONASS
Radio Unspecified No
USB USB Type-C 2.0 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 2340 pixels, 19.5:9 ratio (~395 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 6.53 inches, 104.7 cm2 (~83.6% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD, 450 nits (typ) IPS LCD
Features
Sensors Fingerprint (side-mounted), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2020, November 26 2011, October 04. Released 2011, October 14
Status Available. Released 2020, December 01 Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single - 8 MP, f/2.4, 35mm (standard), 1/3.2", 1.4µm, AF
Triple 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) -
Video 4K@30fps, 1080p@30/60fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  UFS 2.2 -
Misc
Colors Gray, Green, Violet Black, White
Models M2007J22C 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 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, 34, 38, 39, 40, 41 -
5G bands 1, 3, 41, 78, 79 SA/NSA/Sub6 -
Speed HSPA, LTE, 5G HSPA 14.4/5.76 Mbps
Technology GSM / CDMA / HSPA / EVDO / LTE / 5G GSM / CDMA / HSPA / EVDO
  CDMA2000 1xEV-DO CDMA2000 1xEV-DO
Platform
Chipset Mediatek Dimensity 800U (7 nm) Apple A5 (45 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Dual-core 1.0 GHz Cortex-A9
GPU Mali-G57 MC3 PowerVR SGX543MP2
OS Android 10, MIUI 12 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Single 13 MP, f/2.3, 29mm (standard), 1/3.1", 1.12µm VGA, videocalling over Wi-Fi and 3G
Video 1080p@30fps 480p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes, with stereo speakers Yes
  24-bit/192kHz Hi-Res audio -
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