How can I fix this? I had to do a factory reset a week ago or so.. it seems any time now that I need to either register a new product or create an account, it says "enter a valid email address" I just go an do it from my laptop and it works there.. anyone know how to fix this issue?
What accounts are you trying to register on what apps specifically?
What software version is your phone on? (Settings > About Phone > Software Information > Build Number [last 4 characters])