Ladies and gentlemen,

I'm desperate here.

A few weeks back I ran an update on my Sony Xperia Z3 dual and sometime later I discovered that I can't check my account balance. Whenever I dial any ussd code it appears as if it's trying to connect but doesn't.

I've gone to mtn office to complain but they couldn't help.

I know it's a phone issue because my other sim in the phone has same issue.

Has anyone experienced this?

Please can anyone suggest possible solutions?

Thank you.