Hi All,
Many times when I try to connect to GPRS or make or receive a call, my network strength bars disappear and I get a red line over SIM in its place. The problem auto corrects itself in under a minute with the signals coming back, but it is very frustrating when one has to make calls and this happens.

I have tried reflashing but it doesn't help. I got a new sim card to replace my old one but that was no good either.

Can anyone suggest a solution to my problem?

TIA