Today may seem like a very peaceful and steady day in the Android world, but tomorrow will be a completely different story for T-Mobile users (surely you have heard of “the calm before the storm”). Tomorrow, one of T-Mobile’s biggest launch dates will take place, with the release of the T-Mobile G2x, and the successor of the beloved Sidekick family, the Sidekick 4G (As T-Mobile announced last April 7). If that was not enough goodness for a Friday, T-Mobile recently announced that the G-Slate will also be coming to magenta tomorrow.

The prices will be the following (Click on the device name to see specs):

• T-Mobile Sidekick 4G: $99.99 with a 2-year contract / $379.99 off-contract
• T-Mobile G2x: $199.99 on a 2-year contract / $499.99 off-contract
• T-Mobile G-Slate: $529.99 on a 2-year contract / $749.99 off-contract

The numbers seem rather interesting. The Sidekick 4G and the T-Mobile G2x are priced very reasonably, but the tablet seems to be off the trend here. The G-Slate is a very good tablet, but the price is quite high as well, as it always is when these devices are first released (at least with the “big” manufacturers). Sure, it is nice being an early adopter, but there are prices to pay for it.

With three highly anticipated devices launching on the same day, tomorrow should be quite a busy day for T-Mobile stores around the U.S., so you should hurry and get your gadgets soon, especially if you are planning on getting the Sidekick 4G, which is expected to have supply shortages. Are you going for any of these devices? Remember that the HTC Sensation 4G is also on its way here, and many of you have been debating between the Sensation and the G2x.

Don’t Forget to check out the videos of the LG Girl with the G2x and the G-Slate, as well as T-Mobile’s introduction for the Sidekick 4G.