I'm overseas and turned the cellular data off in settings. I can still send and receive texts though. Are the texts routing through the wi fi connection, or am I being charged roaming text rates. It seems like turning cellular data off should disable the ability of the phone to do roaming things you will be charged for.
SMS does not use cellular data in the same way that Internet access does. You will be charged International rates for text messaging. MMS, on the other hand, uses data. If you have data roaming off, you should not be able to send or receive MMS messages, but you will be charged for SMS messages. Undoubtedly cheaper than voice minutes while roaming, but still pricey.
SMS's do not use the cellular data network, rather they use the cellular network. Thus, turning data roaming off or even turning cellular data off has no affect on your ability to send/receive SMS's. And yes, you will be billed for this, and it will be expensive.
when ios5 gets released you could use iMessage to send a msg to another ios5 device over wifi and avoid being billed
No you are still using data, you can also turn off data roaming.
If I turn the cellular network off, I can still send a text. Is this going through wi fi. If so, do I avoid roaming charges overseas?
