This is a bit troubling, particularly since it affects one of the better (or so we thought)
According to T-Mobile, a "very small" percentage of devices suffer from a defective component that causes the display to go blank. We didn't see such a problem on our review device, but if you're stuck with one of the faulty phones you can contact T-Mobile to "discuss available options" (whatever that means). Nokia has otherwise done a decent job with its Xpress Music phones, so we hope the problem stops here. The full text of the T-Mobile statement is after the jump.
T-Mobile has temporarily discontinued sales of the Nokia 5610 Xpress Music to address a defective component in some units that may cause the LED display to go blank. Although we believe the issue to be limited to a very small percentage of devices, T-Mobile and Nokia are committed to providing the best customer experience, which is why we are temporarily suspending sales of the device until Nokia has resolved the issue. If a customer has purchased a Nokia 5610 XpressMusic and is experiencing issues with their device, they should contact T-Mobile Customer Care or visit a T-Mobile retail store to discuss available options.