I noticed that T-Mobile has confirmed as of this morning that an 8X OTA update will begin rolling out on Wednesday.
http://support.t-mobile.com/docs/DOC-5241
From the support document:
On December 19, a software update to OS version 8.0.10211.204 and firmware version 1532.20.20004.531 will be released for the Windows Phone 8X by HTC. The software update, which will be available by Over The Air (OTA), will help address a few bugs, including issues with Bluetooth, devices rebooting, and being incorrectly routed to tethering upsell pages when browsing.
Microsoft will send notification that the software update is available, but customers can manually pull the over the air update by going to phone update> check for updates.
Software versions
See also: Check your software version.
OS version 8.0.10211.204 / Firmware version 1532.20.20004.531
* Released December 19, 2012
* Features software stability improvements and Bluetooth connectivity improvements
OS version 8.09903.10 / Firmware version 1532.20.10006.531
* Original software version
I'm looking forward to this update! I've been experiencing the random reboots and just today starting experiencing the tethering upsell page while I was playing Logic Games. It kept leaving the game and going to the web browser to that page. Super annoying...