In order to test BIS plan, I need to subscribe for it.
Will subscribe for one day trial plan, test it and will let you know.

But the main issue is digressing now. Why won't BlackBerry device allows internet connection of apps even after EDGE connection is restored ?
This issue is combined effect of network and blackberry. Why blackberry have such flaw ? Non Blackberry devices can restore EDGE connection and allow internet connection without need of rebooting.