Shift from 299 to 399 plan in Airtel for BB, HOW?

Send an sms UNPMP to 121 from your BB ofcourse.

Your plan should get deactivated right then. (Might take 24 hrs in some cases)

Then send BIS [your mobile no]  to 121. 

BIS is for the BB4 plan which is the latest Browsing plan of Airtel prepaid, go to this link for the list of plans..

It will get activated within 2-5 mins (can take 24 hrs if the server is too busy).

Restart your BB, remove the battery and insert it again.

When YOUR BB is on again, you will receive the setup confirmations for your email, a software of MAPS is automatically installed, an update software is automatically installed..

Go to your browser and start browsing :D

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I activated my BB4 of Rs.399/- yesterday morning.. Before I had the Rs.299/- plan activated.. The browsing and downloading works great..

I used the BB App World and downloaded softwares and themes, The official Twitter and Facebook works great, downloaded a couple of songs from 4shared (got a speed between 10-20kbps which is kinda ok for a mobile). Everything works fine you can open all the links that you get ;)

I've told all my friends with Airtel (A.P) connections to shift to Rs.399 plan and most of em have and are enjoyin it ;). 

PS: This is avaiable only in Prepaid as per my info.. Wil update when I get to know its there in Postpaid aswell..