[11] Some users have noticed that multitasking does not work on the HTC One X as it does in stock Android 4.0 Ice Cream Sandwich since the system more aggressively terminates apps in the background.

[12][13] On July 20, 2012, HTC confirmed that the One X, along with the One S, would be receiving a firmware update to Android 4.1 Jelly Bean, however did not announce a release schedule for these improvements.

[citation needed] The One X is powered by a NVIDIA Tegra 3 system on a chip with a 1.5 GHz quad-core ARM Cortex-A9 MPCore CPU for most international GSM networks, or a 1.5 GHz dual-core Qualcomm Snapdragon S4 Krait (MSM8960) SoC with an integrated on-die LTE (4G) primarily for North American LTE carriers.

It features 1 GB of RAM; a 1,800 mAh battery, a dual-band 802.11n WiFi radio, Bluetooth 4.0 with aptX, GPS, and NFC.

This port doubles as a MHL interface, allowing the One X to output 1080p content to an external display via HDMI through the use of an adapter.

[19][20] HTC researched "the SoC, networking, display, operating system and preloaded applications" in order to improve battery life.

[23] The HTC One X LTE for North America has been carried by Rogers Wireless in Canada since April 20, 2012 (2012-04-20)[28] and AT&T Mobility in the United States since May 6, 2012 (2012-05-06).

[31] Benchmarks have shown the battery life of the Snapdragon S4 variant to be marginally better than the Tegra 3 version for various common tasks, except for web browsing where the North American model placed 15-30% better.

[21][32] The AT&T version omits many apps, including Voice Recorder, Polaris Office, FM Radio, Flashlight, and Dropbox.

It adds many AT&T apps, including AT&T Code scanner, AT&T FamilyMap, AT&T Navigator, AT&T Ready2Go, Device Help, Live TV, and myAT&T.

On 15 May 2012, shipments of both the One X and the Evo 4G LTE were delayed by U.S. Customs by order of the International Trade Commission, to ensure that its software complied with an import ban imposed on HTC involving a patent owned by Apple.

[36] The HTC One XC is a Chinese variant of the One X, which bears similar specifications to the dual core LTE version.

It is identical to the international quad core version, but is designed to run on China Mobile's TD-SCDMA network instead of GSM.

It is a refreshed version of the One X with a new red and grey or white casing, 64 GB of storage, a larger 2100 mAh battery, an updated Nvidia Tegra 3 clocked at 1.7 GHz, support for GLONASS and an improved front camera (1.6 megapixels, f/2.2).

[16] Myriam Joire of Engadget writes, "On the non-PenTile One X, colors seemed more natural and the whites were whiter than on AMOLED devices like the Galaxy Nexus.

"[18] As one of the newest and highly anticipated flagship phones running Android 4.0 "Ice Cream Sandwich", and with their LTE-capable versions sharing the same Snapdragon S4 SoC, the HTC One X is frequently compared to the Samsung Galaxy S III.

[45] Critics generally regarded the One X's build quality and Super LCD2 screen to be better than the Galaxy SIII plasticky body and AMOLED PenTile display, with some noting that the One X's display may not have the same level of blacks or vibrancy as an AMOLED but having more accurate colour reproduction/temperature with less oversaturation, but the Galaxy SIII had a removable battery and a MicroSD slot that the One X lacked.

Despite the positive reception, the One X was viewed as commercially unsuccessful and overshadowed by the Galaxy SIII in terms of sales and marketing, as well as the iPhone 4S.

The One X's S-LCD 2 is considered superior to the One S's Super AMOLED Pentile display and the One X (Snapdragon S4 variant, not the Tegra 3) includes an LTE-capable modem that the One S lacks; however the One S has better battery life and a form factor that is easier to hold.

Some reviewers noted that it was a stopgap solution, as that the use of a higher-clocked quad-core Nvidia Tegra 3 SoC (with its 40 nm manufacturing process) was less power efficient than the 28 nm Snapdragon S4, and that HTC missed a chance to use the new quad-core Snapdragon S4 Pro which debuted in the Nexus 4 and LG Optimus G and scored significantly higher in GPU tests.