Airtel — not receiving incoming calls on roaming.

Address:	Dehradun, Uttarakhand, 248001
Website:	www.airtel.in

Hi sir/ma'am,
This is adarsh and my airtel no. Is [protected]. I have karnataka sim, and i'm using it in uttarakhand on roaming with up to date top up on roaming plans. I'm not receiving any incoming calls. It say i'm out of coverage for the person who calls up on my airtel no. I have no issues with the signal strength or making any outgoing call. Please fix the problem soon, i'm facing lot of problems due to this. Only other option i can think of is to port the sim.