1.   UMB (*118#)
       E.g. Dial *118# , select Mobile Services > BlackBerry (BIS)
       Then select the BlackBerry service according to the plan you wish to subscribe.
2.   SMS (short code: 28118)
       E.g. Send to 28118
You will be prompted a message Ie : "Depending on your data plan you might incur additional charges. Do you wish to continue?" on your phone, by clicking "OK" you will be charged 5sen/ MB.
For internet tethering you will be notified with the following on your desktop manager
Yes, you will be able to use all BlackBerry® Internet Service while roaming in Celcom 2G. Video streaming and internet tethering will be available nationwide from 18th March 2011 onwards, it will be charged at 5sen/ MB.
Data usage for BlackBerry® Internet Service is included in your Blackberry® Service plan.
For BlackBerry® Internet Service Monthly it will be automatically renewed monthly.
For BlackBerry® Internet Service Daily & Weekly it will not be renewed. You will need to sign up again by dialing *118# after your BlackBerry® Internet Service plans has expired.
Yes, you will receive an SMS notification when your BlackBerry® Internet Service plan is about to expire.
For daily plan, SMS notification will be send 6 hours before expiry.
For weekly and monthly plan, SMS notification will be sent 1 day before expiry.
Yes, you can deactivate the service by dialing *118# and selecting “BlackBerry (BIS)” and selecting “Unsubscribe”. The system will terminate your service at 11:45pm.
Yes, you’re allowed to un-subscribe it any time before the service package expired. Once successful, the service will not be available on expiry date at 23:45.