Carlos Singh

Why can’t I make calls or get connectivity on my Xperia Play R800i?

06 Dec 2012
kernel version 2.6.32.9-perf
Chrome 23
06 Dec 2012 | kernel version 2.6.32.9-perf | Chrome 23

When I put in my SIM card the phone shows that is has signal, but when I try to make a call it is not going through. I tried entering a service code like *120# for balance of my account and it’s saying “connection problem or invalid mmi code” – what’s wrong?