Product
Oppo Reno A
Oppo Reno A
Samsung Galaxy M55s
Samsung Galaxy M55s
Battery
Charging - 45W wired
Type Li-Po 3600 mAh, non-removable 5000 mAh
Body
Build Glass front (Gorilla Glass 5), plastic back, plastic frame -
Dimensions 158.4 x 75.4 x 7.8 mm (6.24 x 2.97 x 0.31 in) 163.9 x 76.5 x 7.8 mm (6.45 x 3.01 x 0.31 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 169.5 g (6.00 oz) 180 g (6.35 oz)
  IP67 dust/water resistant (up to 1m for 30 min) -
Comms
Bluetooth 5.0, A2DP, LE 5.2, A2DP, LE
NFC Yes Yes
Positioning GPS, GLONASS, GALILEO, BDS GPS, GALILEO, GLONASS, BDS, QZSS
Radio No No
USB USB Type-C 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 а/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Display
Protection Corning Gorilla Glass 5 -
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) 1080 x 2400 pixels, 20:9 ratio (~393 ppi density)
Size 6.4 inches, 100.5 cm2 (~84.2% screen-to-body ratio) 6.7 inches, 108.4 cm2 (~86.4% screen-to-body ratio)
Type AMOLED Super AMOLED+, 120Hz, 1000 nits (HBM)
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2019, September. Released 2019, October 2024, September 24
Status Discontinued Available. Released 2024, September 26
Main Camera
Dual 16 MP, f/1.8, 1/2.8", 1.12µm, PDAF 2 MP, (depth) -
Features LED flash, HDR, panorama LED flash, panorama, HDR
Triple - 50 MP, f/1.8, (wide), 1/1.56", 1.0µm, PDAF, OIS 8 MP, f/2.2, 123˚ (ultrawide) 2 MP, f/2.4, (macro)
Video 4K@30fps, 1080p@30fps 4K@30fps, 1080p@30/60fps, gyro-EIS, OIS
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 64GB, 128GB 6GB RAM 128GB 8GB RAM, 256GB 8GB RAM
Misc
Colors Blue, Black Thunder Black, Coral Green
Models CPH1983 SM-M558B, SM-M558B/DS
SAR - 0.93 W/kg (head)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 38, 40, 41, 66
5G bands - 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA, LTE, 5G
Technology GSM / HSPA / LTE GSM / HSPA / LTE / 5G
Platform
Chipset Qualcomm SDM710 Snapdragon 710 (10 nm) Qualcomm SM7450-AB Snapdragon 7 Gen 1 (4 nm)
CPU Octa-core (2x2.2 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver) Octa-core (1x2.4 GHz Cortex-A710 & 3x2.36 GHz Cortex-A710 & 4x1.8 GHz Cortex-A510)
GPU Adreno 616 Adreno 644
OS Android 9.0 (Pie), ColorOS 6 Android 14, up to 4 major Android upgrades, One UI 6.1
Selfie camera
Features HDR -
Single 25 MP, f/2.4, 1/2.8", 0.9µm 50 MP, f/2.4, (wide)
Video 1080p@30fps 4K@30fps, 1080p@30/60fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes, with stereo speakers