Product
Oppo Reno2 Z
Oppo Reno2 Z
Samsung Galaxy M55s
Samsung Galaxy M55s
Battery
Charging 20W wired 45W wired
Type Li-Po 4000 mAh, non-removable 5000 mAh
Body
Build Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame -
Dimensions 162.4 x 75.8 x 8.7 mm (6.39 x 2.98 x 0.34 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 195 g (6.88 oz) 180 g (6.35 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.2, A2DP, LE
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GALILEO, GLONASS, BDS, QZSS
Radio FM radio No
USB USB Type-C USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/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 (~395 ppi density) 1080 x 2400 pixels, 20:9 ratio (~393 ppi density)
Size 6.53 inches, 104.7 cm2 (~85.0% 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, August 28. Released 2019, September 2024, September 24
Status Discontinued Available. Released 2024, September 26
Main Camera
Features Dual-LED flash, HDR, panorama LED flash, panorama, HDR
Quad 48 MP, f/1.7, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP B/W, f/2.4, 1/5.0", 1.75µm 2 MP, f/2.4, (depth) -
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 (gyro-EIS) 4K@30fps, 1080p@30/60fps, gyro-EIS, OIS
Memory
Card slot microSDXC (dedicated slot) microSDXC (uses shared SIM slot)
Internal 128GB 8GB RAM, 256GB 8GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  UFS 2.1 -
Misc
Colors Sky White, Luminous Black Thunder Black, Coral Green
Models PCKM70, PCKT00, PCKM00, CPH1945, CPH1951, PCKM80 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, 38, 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, LTE HSPA, LTE, 5G
Technology GSM / HSPA / LTE GSM / HSPA / LTE / 5G
Platform
Chipset Mediatek MT6779 Helio P90 (12 nm) Qualcomm SM7450-AB Snapdragon 7 Gen 1 (4 nm)
CPU Octa-core (2x2.2 GHz Cortex-A75 & 6x2.0 GHz Cortex-A55) Octa-core (1x2.4 GHz Cortex-A710 & 3x2.36 GHz Cortex-A710 & 4x1.8 GHz Cortex-A510)
GPU PowerVR GM9446 Adreno 644
OS Android 9.0 (Pie), upgradable to Android 11, ColorOS 11 Android 14, up to 4 major Android upgrades, One UI 6.1
Selfie camera
Features LED flash, HDR -
Single Motorized pop-up 16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 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