This did not work… .
Also I went to the service centre and formatted my phone with 2.6 and 3.0 updates.
The Phone still cones with Strong integrity check failed.
I have switched my phone and most be selling this phone.
I have a Nothing Phone 2 also that too comes up with same error.
Due to this a lot of banking appa have failed.
I suggest you keep thisvtread open till we get official resolution done by Nothing
I will also tweet this information on official handle