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Oppo A31 3GB vs Samsung Galaxy Z Flip 8

2G Network SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900   SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1900 / 2100   HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)   LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 14(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700), 30(2300), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500), 46(5200), 66(1700/2100), 71(600)  
5G Network SA/NSA/Sub6  
Dimensions 163.9 x 75.5 x 8.3 mm   N/A  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Nano-SIM + multiple eSIM (max 2 at a time)  
Weight 180 g   N/A  
Display Type 480 nits typ. brightness   Foldable Dynamic LTPO AMOLED 2X Capacitive Touchscreen   120Hz, HDR10+, 2600 nits (peak), Cover display: 4.1 inches, 948 x 1048 pixels (Gorilla Glass Victus 2) Super AMOLED, 120Hz, 2600 nits (peak)  
Display Size 720 x 1600 Pixels (~270 PPI)   7.0 Inches   1080 x 2520 Pixels (~392 PPI)  
Protection Corning Gorilla Glass 5  
Memory 32GB Built-in, 3GB RAM   256/512GB Built-in, 12GB RAM, UFS 4.0  
Card slot microSDXC (dedicated slot)   No  
GPRS Yes
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot   Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct  
BlueTooth v5.0 with A2DP, LE   v6.0 with A2DP, LE  
USB microUSB 2.0, USB On-The-Go   USB Type-C 3.2, OTG  
NFC No   Yes  
GPS Yes + A-GPS support, BDS   Yes + A-GPS support & Glonass, BDS, GALILEO, QZSS  
Main Camera Phase detection, Geo-tagging, touch focus, face detection, HDR, panorama, Video ([email protected])   Dual Camera: 50 MP, f/1.8, 23mm (wide), 1/1.57", dual pixel PDAF, OIS + 12 MP, f/2.2, 13mm, (ultrawide), 1/3.2", LED Flash   HDR, panorama, Video (4K@30/60fps, 1080p@60/120/240fps, 720p@960fps, HDR10+)  
Front Camera 8 MP, f/2.0, HDR, Video ([email protected])   12 MP  
OS Android 9.0 (Pie)   Android 17 OS  
Chipset Mediatek MT6765V/CB Helio P35 (12nm)   Exynos 2500 (3 nm)  
Processor Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)   3.3 Ghz Octa Core  
GPU PowerVR GE8320   Xclipse 950  
Sensors Accelerometer, Compass, Fingerprint (rear mounted), Gyro, Proximity   Accelerometer, Barometer, Compass, Fingerprint (side mounted), Gyro, Proximity, Circle to Search  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone   32-bit/384kHz audio, Speaker  Phone  
Colors Fantasy White, Mystery Black   Various  
Battery (Li-Po Non removable), 4230 mAh   4700 mAh   - Fast charging 25W  
Misc Active noise cancellation with dedicated mic, Document editor, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   IP48 dust and water resistant (dust > 1mm; immersible up to 1.5m for 30 min), Armor aluminum frame, Plastic front (unfolded), glass back + Gorilla Glass Victus 2), Aluminum frame