T-Mobile’s Twitter account just confirmed what earlier leaked documents already revealed: the Samsung Exhibit 4G and Samsung Gravity Smart will be available on June 22nd. Both phones round out a lineup of phone that just added the big-boy HTC Sensation 4G to its stables today. The Exhibit 4G is a device best classed as mid-range, while the Gravity Smart is what we might consider “entry level.” Though the release is only seven days away, pricing on either new handset has yet to be announced.