2 MP, f/2.4, depth
Yes, Oppo A18 offers IP54 rating, which means it can survive limited dust ingress and water splashes from all directions.
Oppo announced 1 major Android updates. So last update will be Android 14.
Oppo announced 3 years of security updates for Oppo A18, so it will receive patches approximately until 2026.
No, Oppo A18 doesn't have Wi-Fi 6 version or newer.