The One X (endeavoru) has a special version of the system files. Sometimes it also works with the "generic" rSAP system files. These have the following issues:
- VW Premium must be set to GSM mode
- SIM pin is ignored
- Porsche PCM does not work
The One X uses the standard BlueZ stack. This has the usual AOSP problems, e.g. missing contacts with "home" and "work" email addresses.
The One X is compatible with the Phonebook Access Profile (PBAP) of the Bluetooth Phonebook app.
How to root
The easiest solution seems to be http://forum.xda-developers.com/showthr ... ?t=1604439.
a. Install HTC drivers, ..., Unlock bootloader
b. Flash recovery.
c. Choose "Perm Root" in "Extras"