How to turn off Developer Mode

I have an app that filter’s my son’s phone (netspark mobile). It isn’t working on his M2 because it says I need to turn off developer mode in order for it to work. What can I do to turn it off? I tried ##6960## but that isn’t working. The developer options are still there under accessibility.

Thanks!
Ira

In Settings, Dev, you can switch On or Off USB Debugging (usually needed for some special programs, I don’ t know what do you mean by filtering the phone). To deactivate Root, go to Recovery and do Clean Data

Reflashing the firmware should do the job.

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