[Resolved]  Vivo Mobile India — Mobile goes off while on call

Address:

North Goa, Goa, 413507

I bought this phone from one of the retailer in goa. It was all good for the last 6 months since i bought. But now in last one month it goes off while on call and reboots automatically. Please advice what to do. I love this brand and i would really like this to get sorted out. I hope the concerned personnel will definitely look into this matter asap

I have vivo 1603
Android version 6.0.1