How to do a factory reset if some of protocols are gone?

[Android Central Question]

I may have deleted a file that may have been needed for a factory reset. Is there another way to reset my phone? It is the AT&T version of the S6.

 

[Morty2264]

Welcome to Android Central! I am unsure if one would be able to delete such a necessary file/function of the phone such as the one you are describing.

Could you describe the file for us? What is it called?

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[mustang7757]

Was phone rooted that you delete some files , if so just flash the stock firmware , factory reset won't bring that back