T-Mobile has once again taken to twitter to announce the release dates for upcoming Android handsets.  This time we’re getting the goods on the dual-core LG handset that is the G2X as well as the Sidekick 4G from Samsung.  Look for the Sidekick 4G to arrive on April 20th, the same date RadioShack announced last week.  Bowing the same day, the G2X will carry the popular $199.99 (after $50 mail-in rebate) price tag.  Can’t wait until the 20th to get your hands on the LG super phone?  You don’t have to.  It lands online five days earlier on the 15th.