T-Mobile just tweeted a few huge release dates. It looks like the long rumored date of April 20th is going to be a huge day for Magenta. The T-Mobile G2x will be releasing in stores on the 20th for $199 with a new 2 year contract and a $50 mail-in rebate. However, if you canâ€™t wait that long, it will be available online on the 15th. The Sidekick 4G will join it in stores also on the 20th for an unnamed price. Thereâ€™s no word on the G-Slateâ€™s availability but I expect another tweet to be shot off soon with another April 20th release.