G_Harivansh_Kothari_hjNr , via OnePlus Nord , Jan 15, 2022 : After upgrade My mobile is not working with Facebook messenger .wiped it formatted it and cleaned all data. Still not working
Shailender Sharma , Jan 15, 2022 : You have done it all already, you might have to visit the service center for further diagnosis of your phone, Contact OnePlus support for further help Here
Himanshu.Behera , via OnePlus Nord , Jan 15, 2022 : Not working - means you are not able to open the app or you are not able to login in the app
G_Harivansh_Kothari_hjNr , Jan 19, 2022 : already done it also went to oneplus sevice center they updated software it started working but in 1 day same problem happened.
Shailender Sharma , Jan 20, 2022 : If you go back to the service center again, they will say that the motherboard needs to be replaced, standard reply! Have you tried to contact the support and explained everything?