When Motorola introduced the tablet in January it said users would be able to upgrade to the faster network, and shortly after it said the upgrades would happen in the second quarter. Motorola has since admitted that it has struggled to develop equipment for LTE networks.

Device upgrades are usually software-based, so users can receive them over the Internet. But in this case, users will have to send their devices to Motorola to get new hardware. The company said it will take about six business days.

Customers don't have to pay for the process or change their data plans. Xoom users can visit a for instructions.

Motorola also said anyone can buy a 4G Xoom at Verizon stores starting Oct. 13 for US$500 with a two-year contract.

The Xoom was the first device to run Google's Android Honeycomb OS, designed for tablets, but many more have since launched.