Nokia Lumia 900 has been launched in US last week. Some of the AT&T consumers who have ordered the phone in advance have received it. However, a portion of the pre-ordered phones have found to be plagued with a network connection issue. This includes connectivity to 2G, 3G and 4G LTE.
This issues is already discussed in many of the online communities including Nokia Support Discussions. An AT&T employee has also confirmed this issue. The devices were subjected to mass production in a plant in Mexico. The defect regarding the imei registration to the data networks including 2G, 3G and 4G.
Both Nokia and AT&T have silently addressed this issue and are effectively working to remove the defective units from stock. The devices are found to work on the first boot but they will stop connecting after reboot, turning airplane mode on and off and restart. It will indicate data is connected but it will not function.
Some of the Lumia 900 owners have resolved this issue by removing the SIM card, performing a master reset and booting the product without a SIM card. They have then verified the SIM card is LTE supported and then inserted it and booted the phone again.
However, this solution is not a lifesaver for all the users. Still some are having issues with the smartphone. The best option is to get a replacement for free. Let us hope that this will not continue when the phone releases in the other countries.