Product
Oppo K1
Oppo K1
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 3600 mAh, non-removable Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build Glass front (Gorilla Glass 5), plastic back, plastic frame Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 158.3 x 75.5 x 7.4 mm (6.23 x 2.97 x 0.29 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 156 g (5.50 oz) 140 g (4.94 oz)
  - Scratch-resistant glass back panel
Comms
Bluetooth 5.0, A2DP, LE 4.0, A2DP, LE
NFC No -
Positioning GPS GPS, A-GPS, GLONASS
Radio No No
USB microUSB 2.0, OTG 2.0
WLAN Wi-Fi 802.11 а/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 (~402 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 6.4 inches, 101.0 cm2 (~84.5% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type Super AMOLED IPS LCD
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2018, October. Released 2018, October 2011, October 04. Released 2011, October 14
Status Discontinued Discontinued
Main Camera
Dual 16 MP, f/1.8, 1/2.8", 1.12µm, PDAF 2 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single - 8 MP, f/2.4, 35mm (standard), 1/3.2", 1.4µm, AF
Video 4K@30fps, 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 4GB RAM, 64GB 6GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  eMMC 5.1 -
Misc
Colors Blue, Red, Silver Green Black, White
Models PBCM30 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, 18, 19, 20, 26, 28, 38, 39, 40, 41 -
Speed HSPA 42.2/11.5 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 14.4/5.76 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO
  - CDMA2000 1xEV-DO
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Apple A5 (45 nm)
CPU Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Dual-core 1.0 GHz Cortex-A9
GPU Adreno 512 PowerVR SGX543MP2
OS Android 8.1 (Oreo), ColorOS 5.2 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Features HDR -
Single 25 MP, f/2.0, 1/2.8", 0.9µm 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