Phone [Q] Us Cellular S3 Connectivity Problem

Hi all ,

I have the SCH-R530U . Only problem i face is that i cannot receive any international calls or calls with country code prefix... The phone just hangs and restarts it self.
Neither can i receive any international text msgs.I know that my CDMA Sim is ok as i tried it on other devices.
I am using it in India and i am running KK 4.4.2.
Everything else works like a charm .

Is there any solutions plzz ?