FYI, you can turn off data roaming or just shut off cellar data altogether if you still want to use your cell when traveling abroad.

I use the iPhone and just turn cellar data off altogether just to be safe. Last time I traveled abroad I unlocked one of my wife's old cell phones and just bought a SIM card overseas. You can reload it and I found it to be much cheaper than anything I would use through my cell phone provider.

Unlocking it can be a little pricey, but I found or to worth it. Easier to do than you think. Unlockings.com: The Leading Unlocking Site on the Net