Intex Mobile — Showing out of coverage though network signnal strength is normal

Address:

New Delhi, Delhi

I purchased Intex Aqua Style 4.0 in nov 2014. It was working properly till april 30, 2015. After that it started problem and it doed not catch signal. I got changed SIM also. After that I changed my mobile operator. The same SIM at the same location works in other set but it does not work in this set. I deposited it and it was attended in OKHLA Delhi service centre but my issue is not resolved. Now this set is lying since april as unsed. I could only use it for 4.5 months only. It is my humble request to have a look on my issue.