https://community.sony.rs/t5/xperia-archive/invalid-mmi-code/m-p/3492162#M540919 while I am trying to check my balance in z3 dual it is showing either "ussd code running" or "invalid mmi code". how to solve??? Tue, 14 Jun 2016 21:29:02 GMT rakibulctg 2016-06-14T21:29:02Z https://community.sony.rs/t5/xperia-archive/invalid-mmi-code/m-p/3492162#M540919 while I am trying to check my balance in z3 dual it is showing either "ussd code running" or "invalid mmi code". how to solve??? Tue, 14 Jun 2016 21:29:02 GMT https://community.sony.rs/t5/xperia-archive/invalid-mmi-code/m-p/3492162#M540919 rakibulctg 2016-06-14T21:29:02Z https://community.sony.rs/t5/xperia-archive/invalid-mmi-code/m-p/3492163#M540920 <P>this is more of your network service provider feature,. please ask their customer service for more details/solution</P> Tue, 14 Jun 2016 22:24:34 GMT https://community.sony.rs/t5/xperia-archive/invalid-mmi-code/m-p/3492163#M540920 MarlonUk1 2016-06-14T22:24:34Z