My Sister has a Galaxy A20 SmartPhone. It was going so slow and just not working Right. So She somebody in a Service Place did a Factory Reset on Her Phone. But She Forgot Her G Mail and Password so they Made a New G Mail Account for Her so they could get Her Phone Working. So everything is working good and She has all of Her Apps and everything. I Told Her I have Her G Mail Account and Password for Her. Can I just Sync Her Phone to Her Old G Mail Account and Delete the G Mail Account they Made Her and have Her Phone work ok? Or will this Mess everything they did?