Airtel 3G Problem

[Crazysah]

Hello,
I have an HTC One and I recharged my Airtel 3G prepaid number. The problem I have is that the 3G keeps going on and off every five to ten minutes or so. Any ideas? Maybe the APN settings are wrong?
I'm in Delhi.
Thanks,
Crazysah

 

[x720]

airtelgprs.comShould most likely be correct. Could be a SIM card/local network fault?

 

[Crazysah]

I don't know. Can't really be a SIM card fault as it was perfectly working in the summer.
Local network fault, nah. Working on other phones.
Any other idea? And for the APN, I only put in airtelgprs.com and nothing else?