not able to make outgoing calls from I phone 5
I am having a I phone 5 and the serial number is C7******TWD AND MY MODEL NO. IS FD297ZA/A . SUDDENLY I AM HAVING TROUBLE FOR OUTGOING CALLS. I AM NOT ABLE TO MAKE ANY CALLS BUT OTHER FUNCTIONS LIKE INCOMING, APPS, E-MAIL, AND OTHER FUNCTIONS ARE WORKING PROPERLY. I HAVE USED MY PHONE CARD TO OTHER PHONE AND REALISED THAT PHONE CARD IS WORKING PROPERLY. MAY I KNOW IS THERE ANY TROUBLE WITH MY OPERATING SYSTEM OR SOME MAJOR TROUBLE, BECAUSE IT OCCURED SUDDENLY
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iPhone 5, null