Steps 4 and 5 of our Teardown show what appears to be the Wi-Fi module, which would likely be replaced by an LTE-friendly wireless module. As for the "purpose," it's all about being able to use your Xoom on the LTE network.
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!