Answer to: Wifi Only Xoom upgradable to 4G LTE?I just tore a WiFi only Xoom apart. There are blank solder pads on the circuit board where the necessary parts would go. In other words, it would be a major rework of the device to add those parts, it's not as simple as plugging in the mini PCI card. There are also no cellular antennae in the device. I would suggest there's too much missing to make it upgradeable.