Instructions to turn notifications on or off on Oppo devices

Oppo A5 (2020) Oppo A5 (2020)
Oppo Reno A Oppo Reno A
Oppo Reno2 Z Oppo Reno2 Z
Oppo Reno2 F Oppo Reno2 F
Oppo Reno2 Oppo Reno2
Oppo Ulike 2 Oppo Ulike 2
Oppo Mirror R819 Oppo Mirror R819
Oppo R1 Oppo R1
Oppo Joy Oppo Joy
Oppo R6007 Oppo R6007
Oppo R1K Oppo R1K
Oppo Neo 5 4G Oppo Neo 5 4G
Oppo 3007 Oppo 3007
Oppo 3005 Oppo 3005
Oppo R1C Oppo R1C
Oppo 3000 Oppo 3000
Oppo A51 Oppo A51
Oppo Mirror 5 Lite Oppo Mirror 5 Lite
Oppo R7 Plus High Version Oppo R7 Plus High Version
Oppo F1 ICC WT20 Oppo F1 ICC WT20