mjumrani
Forerunner
Try the "Reset Network Settings"
I am not sure if this can be done with a jailbroken iPhone so first confirm that. I am pretty sure one should not do the reset all settings with a JB iPhone.
I sent a strong mail to corpcare. Lets see what happens.
Restore to new iPhone is not an option as I can't lose messages/photos/app data/ etc, I'd rather switch to Airtel.