Product
Oppo A2 Pro
Oppo A2 Pro
Samsung Galaxy M55s
Samsung Galaxy M55s
Battery
Charging 67W wired, PD, 54% in 20 min Reverse wired 45W wired
Type Li-Po 5000 mAh 5000 mAh
Body
Dimensions 162.7 x 74.3 x 8 mm (6.41 x 2.93 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 183 g or 185 g (6.46 oz) 180 g (6.35 oz)
  IP54 dust protected and water resistant (water splashes) -
Comms
Bluetooth 5.3, A2DP, LE, aptX HD 5.2, A2DP, LE
Infrared port Yes -
NFC Unspecified Yes
Positioning GPS, GLONASS, GALILEO, BDS, QZSS 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 a/b/g/n/ac/6, dual-band Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 2412 pixels, 20:9 ratio (~394 ppi density) 1080 x 2400 pixels, 20:9 ratio (~393 ppi density)
Size 6.7 inches, 108.0 cm2 (~89.4% screen-to-body ratio) 6.7 inches, 108.4 cm2 (~86.4% screen-to-body ratio)
Type AMOLED, 1B colors, 120Hz, 500 nits (typ), 800 nits (HBM), 950 nits (peak) 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 2023, September 15 2024, September 24
Status Available. Released 2023, September 22 Available. Released 2024, September 26
Main Camera
Dual 64 MP, f/1.7, 25mm (wide), 1/2.0", 0.7µm, PDAF 2 MP, f/2.4, (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@30/60/120fps, gyro-EIS 4K@30fps, 1080p@30/60fps, gyro-EIS, OIS
Memory
Card slot No microSDXC (uses shared SIM slot)
Internal 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  UFS 3.1 -
Misc
Colors Black, Purple, Brown Thunder Black, Coral Green
Models PJG110 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 850 / 900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 3, 5, 8, 28, 34, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 38, 40, 41, 66
5G bands 1, 5, 8, 28, 41, 77, 78 SA/NSA 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6
Speed HSPA, LTE (CA), 5G HSPA, LTE, 5G
Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G GSM / HSPA / LTE / 5G
  CDMA2000 1x -
Platform
Chipset Mediatek Dimensity 7050 (6 nm) Qualcomm SM7450-AB Snapdragon 7 Gen 1 (4 nm)
CPU Octa-core (2x2.6 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55) Octa-core (1x2.4 GHz Cortex-A710 & 3x2.36 GHz Cortex-A710 & 4x1.8 GHz Cortex-A510)
GPU Mali-G68 MC4 Adreno 644
OS Android 13, ColorOS 13.1 Android 14, up to 4 major Android upgrades, One UI 6.1
Selfie camera
Single 8 MP, f/2.0, (wide) 50 MP, f/2.4, (wide)
Video 1080p@30fps 4K@30fps, 1080p@30/60fps
Sound
3.5mm jack No No
Loudspeaker Yes Yes, with stereo speakers