An unnamed source, who reportedly works for AT&T, told Phone Arena that some phones’ International Mobile Equipment Identity numbers are failing to register with the AT&T’s data network. The carrier and Nokia are removing defective devices from store shelves, the source said, but AT&T and Nokia have not publicly confirmed the problems.
Some forum users are suggesting that users should remove the Lumia 900′s SIM card, perform a master reset, reboot the phone, turn off the device, then reinsert the SIM card and boot up again. Other users say this method doesn’t permanently fix the problem.
I doubt this is a huge setback for Nokia’s latest Windows Phone, especially if AT&T is no longer selling Lumia 900 phones that have data problems, but it is ironic given Nokia’s ad campaign for the phone, which tries to paint Apple’s iPhone as a beta product. As it turns out, some of the Lumia 900′s early adopters are playing guinea pig.