What does a "factory Reset" do if rooted?

[amajamar]

Does it do anything at all? If you are just rooted, will it restore the phone to factory unlocked? Or, just nothing?

 

[jeffv2]

All factory reset does is format/ delete every file under /data and /cache.

So the phone will still be rooted and unlocked but none of your user data will be there

Sent from my Galaxy Nexus using Tapatalk

 

[JSM9872]

The only thing I would add is that if you do it from the Settings menu under Backup & reset it also deletes all of your pictures, music, and anything else you have stored on there.

 

[amajamar]

What would happen if you were running a custom ROM? Would it revert to being a stock rooted, unlocked ROM or the same ROM without any of the personal data?

 

[JSM9872]

It would be the same ROM - personal data.