iphone 3g in other countries

[HelloMotto]

So im travelling to asia this summer and i want to bring my iphone 3g to listen to music and go on the internet. I live in Canada and my current carrier is Rogers. I dont plan on calling using this phone during the trip and even if i try it probably wont work. Still, should i take out the sim card? Im just afraid of possible large fees or charges.

Oh and will the 3G network work in Asia?

 

[Insilin1i]

If roaming is on and the carrier that your phone joins has 3G network then you will pay ALOT of $$$$$ for using data internationally so I would recommend you just take your sim out or call Rogers and tell them to disable roaming if it is on.

 

[HelloMotto]

thanks
I guess ill just take out the sim just to be safe. If i reinsert the sim card, do i have to call Rogers and go through some activation processes? Or will it just work?