Hi please help me ,, I have this sony experia arc s lit18 it's not fully functioning now, the reason why it's not working now, when I tried to change my mobile sim to internet sim and when I open it first the sony experia logo appears after that it shows all display but no service on network, and then when I tried to slide the unlock, my phone going to shutdown and restart every time, i tried to open it .. Guys please help me how to fix this problem, thank you so much
