Network Problem for 30 sec after end call

[sivanesh_p_gmai]

2 Months before i bought Xperia E c1504. Starting onwards i am facing this same problem and music stuttering problem. After i changed firmware version,  there is no more music stuttering problem. But still network problem is there. That means after every call coverage goes for 15 sec. How can i rectify this problem?

[Sam]

Are you able to test a secondary SIM in your handset?

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