Let's compare each phone and tablet in the specs table.
| OPPO Reno9 A | Rakuten BIG s | |
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| Manufacturer | OPPO | Rakuten Mobile |
| Release Date | ||
| Screen Size | 6.4 inch | 6.4 inch |
| Resolution | 1,080 x 2,400 | 1,080 x 2,340 |
| Display Details | AMOLED | |
| Max Refresh Rate | 90 Hz | |
| Max Brightness | 600 nits | |
| Glass | ||
| Body Size | 74mm x 160mm x 7.8mm | 79mm x 160mm x 9mm |
| Weight | 183 g | 204 g |
| Processor | Qualcomm Snapdragon 695 5G | Qualcomm Snapdragon 765G 5G Octa-core 2.4GHz + 2.2GHz + 1.8GHz |
| OS | Android 13 | Android 10 |
| Main camera 1 | 48-megapixel(f/1.7) | 48-megapixel |
| Main camera 1 details | ||
| Main camera 2 | 8-megapixel(f/2.2) | 8-megapixel |
| Main camera 2 details | ultra-wide angle 120° | ultra-wide-angle |
| Main camera 3 | 2-megapixel(f/2.4) | 8-megapixel |
| Main camera 3 details | macro | Telephoto (2x optical) |
| Main camera 4 | 2-megapixel | |
| Main camera 4 details | depth charge | |
| Main camera 5 | ||
| Main camera 5 details | ||
| Sub camera 1 | 16-megapixel(f/2.4) | 16-megapixel |
| Sub camera 1 details | ||
| Sub camera 2 | ||
| Sub camera 2 details | ||
| Battery | 4,500 mAh | 3,900 mAh |
| Charge | ||
| Video playback time | 15 hours | |
| RAM(GB) | 8G | 6G |
| RAM details | ||
| ROM(GB) | 128G | 128G |
| ROM details | ||
| Antutu | 390,000 ver9 | 310,000 ver8(estimated) |
| Water resistance | IPX8 | IPX7 |
| Dust resistance | IP6X | IP6X |
| SIM | dual SIM(nanoSIM＋eSIM) | |
| NFC | Felica |