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Discussion in 'iPhone' started by lmcintyre, Jan 7, 2009.
That means, in general, that data plans which don't include a Tethering option cannot be used to connect a device (such as an AirCard) to a Personal Computer (or laptop), no matter what means is used to connect the device to the Personal Computer (such as an ExpressCard slot).
It doesn't necessarily mean that it won't function. In fact, you probably would get a functioning data connection. And yes, it ought to automatically fall back to EDGE (or even GPRS) if necessary.
However, if AT&T detects the fact that data is being used outside of the plan's intended applications, you'd run the risk of having your service terminated and/or being charged AT&T's pay-per-use rate for any such uncovered usage. That rate is currently about $0.0019 per kilobyte.
But.....unless you plan on excessive use and get your account red flagged then yes, you can use your 3G sim in the ExpressCard.
It should work, but it would just be easier to get PDnet and not have to worry about buying an air card.
True PDANET or any of the other tethering software solutions out there will be cheaper. HOWEVER they have a tendency to drain the iPhone faster then it charges.... So for more then 2-3 hours use the Aircard is a better bet.