We scooped RadioShack’s The Shack’s initial T-Mobile launch portfolio earlier this month and as the reborn retailer kicks off its T-Mobile offering, the one missing piece of the puzzle has just fallen into place. We knew Tmo’s new budget messaging machine was due some time this month and we knew The Shack would stock it from day one (today), so since it wasn’t available yesterday… One plus one apparently does equal two. Coming in an an ultra-affordable $29.99 after mail-in rebate on a 2-year contract, the Samsung Gravity 2 features a side-sliding QWERTY along with a 2 megapixel camera, MP3 player, Bluetooth and microSDHC support. In other words, it’s the perfect handset for a light user looking for a text-friendly cheapo or a tween looking for a phone that comes in “metallic pumpkin”.