So I bought a samsung A03S and a week after I lost it then I found it. I beginning to believe it was lost. When I found it I stopped getting calls and msgs, it was slower and I could hardly make phone calls. MMI codes don't work so I downloaded and device info app and it's saying the OS is rooted and most the pre installed apps are altered. This phone came out the box brand new so I no it had to of happened when I "lost" it. What can I do and can I find out by who?