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Rivo Rhythm RX88 vs Oppo A6x

2G Network SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network WCDMA 900 / 2100 HSDPA 850 / 900 / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 143.5 x 72 x 9.5mm 166.6 x 78.5 x 8.6 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 160g 210 g  
Display Type FWVGA Display IPS LCD Capacitive Touchscreen   120Hz, 1125 nits (HBM)  
Display Size 6.75 Inches   720 x 1570 Pixels (~256 PPI)  
Memory 8GB built-in 128GB Built-in, 6GB RAM, UFS 2.2  
Card slot microSD card (supports up to 32GB) microSD Card, (supports up to 256GB)  
RAM 1GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n) Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v5.0 with A2DP, LE  
USB USB USB Type-C 2.0, OTG  
NFC No  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO, QZSS  
Main Camera 5 MP, LED Flash, Auto-Focus, Video, 13 MP, f/2.2, (wide), AF, LED Flash   HDR, Panorama, Video (1080p@30/60fps)  
Front Camera 2 MP 5 MP, f/2.2, (wide), Video (1080p@30fps)  
OS Andriod OS V6.0 (Marshmallow( Android 15 OS  
Chipset Qualcomm SM6225 Snapdragon 685 (6 nm)  
Processor 1.3 GHz Quad-Core, MTK6580M Octa-core (4 x 2.8 GHz Cortex-A73 + 4 x 1.9 GHz Cortex-A53)  
GPU Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser WAP HTML5  
Sound FM Radio, 3.5mm audio jack, MP4/WMV/H.264/H.263 player, MP3/AAC/WMA/WAV player, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, Speaker Phone  
Colors Various Violet Purple, Plum Purple  
Battery Talk-time up to 4.5 hrs 2200 mAh 6500 mAh   - 5W reverse wired  
StandBy Time Stand-by up to 11 days
TalkTime Talk-time up to 4.5 hrs 2200 mAh
Misc Dual Sim, Dual Stand-by, Google Search, Maps, Gmail, Youtube, Calendar, Auto Call Recording, Call and SMS Block, Mobile Tracker, World Clock, Social Apps TBD, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP64 dust tight and water resistant (water splashes)