I have been using the unlocked iPhone 3g for a few months now with the 9.99data plan with the APN being internet2.voicestream.com. Yesterday afternoon all of a sudden internet connectivity was lost and accessing any website would take me to this T-Mo page that says my data plan is not compatible with the device and I need to upgrade. I changed the APN to everything else listed on this thread but no luck. I did upgrade to software / firmware 3.0 on the iPhone 3g recently but that has got nothing to do with it because it was working for a few days up until yesterday.
I got T-Mo tier-3 technical support and they told me that the system has caught up - towers are being updated to send out signals to devices that are not on the right plan. I called today again and said "PDA" to the automated system and was taken to some other customer service department, although similar answer - obviously now I am screwed because every new customer rep can see the notes that say that I am on the wrong plan for the device, but the answer was that they are upgrading their systems to find users who have devices without the right 24.99 smart phone internet plan. The system is finding out now what it should have found out months earlier.
Any suggestions on what I can do? Anybody else run into this?
Thanks
PS: Superkid - what did you mean by "set my phone to a SIM card" on My T-Mo website? Thanks