How to get 82mb data on Airtel for #100

Actually, this is a data plan for blackberry called
Unlimited Blackberry Daily Service but it works
on all phones and it does not expire even after
a day. I don't know how many days it take for
this plan to expire as mine have never expire
before.
How To Get It
1. Load 100 naira airtel recharge card.
2. Send BBUD as a text message to 440
3. You will receive a confirmation message from
airtel telling you that your subscription was
successful,
4. Remove your battery and re-insert it (I don't
think this is necessary). Then you can start
browsing. You can check your data by dialing
*123*10#