I cant use any ussd codes on my phone

[Sebastian234]

Everytime I try to call the ussd codes a message pops up saying invalid code or connection problem and from what I can tell the connection is fine and the codes are correct

Posted via Android Central App

 

[mhinc]

Everytime I try to call the ussd codes a message pops up saying invalid code or connection problem and from what I can tell the connection is fine and the codes are correct

Posted via Android Central App

Which USSD codes are you entering??

 

[dhadha]

Which USSD codes are you entering??

It automatically active my phone to my sim?