03-28-2013 07:33 PM
Many messenger-type apps rely on BIS, BlackBerry Internet Service, to "push" content to your phone. While many will work over Wi-Fi, you still need BIS on your account so as to have the correct service books on your phone.
Do you have BIS with Aircel? If not, that's probably your problem. If you do, post back and we'll have a look at some options.