I was interested in actively switching between a Windows Phone (HTC Radar) and BB 9700. When I inserted the SIM (BB data plan w/ BES) into the Windows Phone data did not work. If I wanted to use the Windows Phone - even for a few hours with TMo - I would have to change my data plan.
Is this the case with ATT?
Here is the scenario I would like to accomplish. Use BB 9900 for 90% of the time. Swap SIMs to Windows Phone for certain scenarios.
Will I have to change my data plan if I wish to light up the Windows Phone for even for a very limited period?