With all of our busy lives, it’s easy to forget a thing or two. Well, if you are the proud owner of a Motorola XOOM 3G tablet, then you’ll want to remember one thing this month. Owners have until March 31 to send in their 3G tablets for 4G LTE upgrades. The upgrade is completely free and only takes a couple of weeks for completion. We know, it’s tough to live without your tablet for a few weeks, but in the name of 4G LTE, just send it in already. Additional upgrade details can be found here.