Product
Xiaomi Redmi 15 4G
Xiaomi Redmi 15 4G
₹18,058
Apple iPhone 4s
Apple iPhone 4s
₹19,045
Battery
Charging 33W wired -
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type Si/C Li-Ion 7000 mAh Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build - Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 171.1 x 82.1 x 8.6 mm (6.74 x 3.23 x 0.34 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 224 g (7.90 oz) 140 g (4.94 oz)
  IP64 dust tight and water resistant (water splashes) Scratch-resistant glass back panel
Comms
Bluetooth 5.0, A2DP, LE 4.0, A2DP, LE
Infrared port Yes -
NFC Yes (market/region dependent) -
Positioning GPS, GLONASS, GALILEO, BDS GPS, A-GPS, GLONASS
Radio No No
USB USB Type-C 2.0 2.0
WLAN Wi-Fi 802.11 b/g/n/ac, dual-band Wi-Fi 802.11 b/g/n, hotspot
Display
Protection - Corning Gorilla Glass, oleophobic coating
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~374 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 6.9 inches, 116.9 cm2 (~83.2% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD, 144Hz IPS LCD
Features
Sensors Fingerprint (side-mounted), accelerometer, compass Accelerometer, gyro, proximity, compass
  Virtual proximity sensing -
Launch
Announced 2025, August 01 2011, October 04. Released 2011, October 14
Status Available. Released 2025, August 01 Discontinued
Main Camera
Dual 50 MP, f/1.8, (wide), PDAF Auxiliary lens -
Features LED flash, HDR LED flash, panorama, HDR
Single - 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 128GB 6GB RAM, 256GB 8GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
Misc
Colors Midnight Black, Titan Gray, Sandy Purple 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 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands LTE -
Speed HSPA, LTE HSPA 14.4/5.76 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO
  - CDMA2000 1xEV-DO
Platform
Chipset Qualcomm SM6225 Snapdragon 685 (6 nm) Apple A5 (45 nm)
CPU Octa-core (4x2.8 GHz Cortex-A73 & 4x1.9 GHz Cortex-A53) Dual-core 1.0 GHz Cortex-A9
GPU Adreno 610 PowerVR SGX543MP2
OS Android 15, HyperOS 2 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Features HDR -
Single 8 MP, f/2.0, (wide) VGA, videocalling over Wi-Fi and 3G
Video 1080p@30fps 480p@30fps
Sound
3.5mm jack No 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
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