Technically, Oppo A37 has all the necessary hardware which is essential for Android 8 Oreo. But Oppo has not yet released an update for the same. Until the time, Oppo does not release an update for Android 8 Oreo you cannot upgrade it.
No. Oppo A37 does not have a fingerprint sensor.
No. OPPO A37 do not support quick charge but the charging speed is much faster than other android mobile phones. Quick Charge is available in new OPPO F3 Plus .
No. OPPO A37f is not waterresistant.
Once again Oppo has presented us with a device that is functional, to the point and performs just as expected.