even if data roaming is off, your phone still handshake with the roaming telco.

I tried to use u mobile once at Brunei , cellular data on, roaming off - the iPhone data usage will register "data roaming :few kB)

but u mobile didn't charge me a single sen for it.

I think this is just a confirguration issue on the celcom network. I know for one that you need to disable your voicemail if you travel overseas on celcom.

issues like this make me hesitant to return to celcom

This post has been edited by Chrono-Trigger: Apr 11 2016, 07:20 PM