FIND MY IPHONE ACCOUNT ISSUE?

I downloaded iOS9 without downloading iOS8, i went to apple and they rebooted my phone… It went to the start of an iphone again and took me to Find my Iphone. Thing is my mum put an account on and we have no idea what the password is and we think the account email is invalid and we have no idea what to do!

Create new Apple ID for your iPhone, No other options. But for phone security you must install Leo Privacy Guard app which is free available in Play Store as well in iTunes.