According to a leaked image received by BGR from a “trusted source,” AT&T’s first 4G LTE smartphone will likely be manufactured by Samsung. However, it will not be the iconic Galaxy S II, but it is a smartphone that will likely be almost as impressive. The Samsung Impulse 4G is rumored to be AT&T’s first 4G LTE smartphone, and by the looks of it, it is likely the AT&T equivalent of Verizon’s Droid Charge. It will be interesting to see if Samsung will stick a dual-core processor inside the Impulse, which would make it a great superphone, given the fact that it will run on AT&T’s 4G LTE network. If this rumor pans out, I’m sure we’ll be hearing more in terms of rumors and leaks in the coming weeks. Unfortunately, there is no word on an expected launch time frame or pricing.