How do I activated the ussd code on my iPhone 5 gv ios 8.3?

[iMore Question]

how to activated ussd code on iphon 5 gv ios 8.3

i recently upgrade my gv phone from ios7.3 to ios 8.3 now the ussd option is disabled ,how can i activate it, i tried a lot but didn't find any solution .please help me

 

[Bigeric23]

Re: how to activated ussd code on iphon 5 gv ios 8.3

Have you tried contacting your carrier for assistance, since you already tried many other options?

 

[javid_zare_s]

Re: how to activated ussd code on iphon 5 gv ios 8.3

If you use gevey then you should know that its not fully compatible with ios8
Upgrade its sw if possible or u can only buy a brand new one