While Samsung Galaxy S3 was released in UK last month, Samsung fanboys located in U.S. are still waiting to get their hands on the device. And if the latest reports surfacing online are to be believed, then it is coming to AT&T by June 21.

Folks at Droid Matters claim to have received information from multiple AT&T customers who have preordered Samsung Galaxy S3 from the carrier that the device is expected to arrive on AT&T on or before June 21. The smartphone is already up for preorders on AT&T Web site. Surprisingly, the smartphone will turn red on AT&T, while it is only available in two variant (marble white and pebble blue) worldwide. However, the red edition of Galaxy S3 will be hitting AT&T shelves sometime later this summer.

Samsung confirmed earlier that company's latest flagship smartphone is hitting all major U.S. carries. T-Mobile and Sprint will also join the launch party with AT&T on June 21. However, Verizon Wireless is expected to launch the device in the first half of July. Another carrier, U.S. Wireless, is also getting the device, but the release date on that carrier is still unknown.

The Galaxy S3 packs a 4.8-inch Super AMOLED HD display. AT&T Galaxy S3 device runs on dual-core 1.5GHz Snapdragon S4 processor with 2GB of RAM. The device has 16/32GB of internal storage with microSD card support up to 64GB. Reportedly, Samsung will also be launching a 64GB variant of Galaxy S3 later this year.

Samsung's latest flagship model runs on Android 4.0 (Ice Cream Sandwich). The Galaxy S3 comes with impressive software features like S Voice, Pop-up Play, Smart Eye tracking, Burst shoot camera mode and S Beam. It has 8-megapixel camera at the back that can record fullHD 1080p videos.

Samsung is also offering 50GB of free Dropbox storage to Galaxy S3 owner. Unfortunately, AT&T has opted out of the promotional offer and AT&T Galaxy S3 owners will only get the regular 2GB online space for free when they sign up.