If you own the Verzion version of the Motorola XOOM and haven’t sent it in for its 4G update yet, listen up. Verizon and Motorola will only be offering the upgrade until March 31 of 2012, so there’s less than a month left to send it in. We’d suggest that even if you don’t use 4G, send it in. You may want it in the future, and it will also increase retail value if you decide to sell it. Who’s planning on sending in their XOOM before the time is up? Why haven’t you already? Tell us about it in the comments!