[fghthytrhtyhrthyetyhrthyty]

I use a prepaid SIM card and I learnt from my carrier that it is impossible to have global roaming

What can I do

[Heresy]

As long as you device is unlocked you can buy prepaid sim cards from a local carrier while your there.

Posted from my CrackBerry at wapforums.crackberry.com

[fghthytrhtyhrthyetyhrthyty]

Then how to register in other country's internet service
What about my local one how to cut it and stop charging

How can I check the unlocked phone

[skyrider007]

I don't think you will find any carrier that offers BIS on pre paid plans with an exception of Orange in the UK.