This isn't the first time that we've seen the HTC One X+ name used for a possible sequel to the HTC One X. Back in July, the GLBenchmark site showed a device called the HTC One X+ with speculation that a quad-core 1.7GHz Tegra 3 was under the hood. At the time, Android 4.0.4 was installed, but it would certainly make sense for the sequel to the HTC One X to be driven by Android 4.1.
With HTC's September 19th press event looming larger in the background, we could get some more information about this model. Whil no carrier was mentioned on the tweet, the HTC One X+ found on the GLBenchmark site had AT&T release keys, giving us a clue about where this model could end up in the States.
source: @Football4PDA via PocketLint