Confirmed! Stock AT&T OneX on 3.18 JB 4.1.1. SuperCID 11111111 , HTC Dev bootloader unlocked, TWRP recovery installed, perm rooted.
After installing the ROM (choose S-ON), reboot into the bootloader. You need to flash PH98IMG.zip in the bootloader. It's pretty straightforward. Just follow the on screen prompts.
After searching for many days, I was unable to find a real fix for my MMS issues when using any Global based ROM. Everything else worked perfectly, except for MMS. I cound not send or receive. This is how I was able to resolve the issue:
Anyone got the 10.56 radio? All the radio links are dead
Here you go: