Originally Posted by reficuliu
Thank you guys. Actually my phone is the Developer's Edition. I'm still in search of a ROM that is stripped of T-Mobile bloatware and running as stock as possible with the Wifi Calling feature. It seems like I am unable to download/flash the firmware upgrade as my Model ID isn't matching either for 5.14.531.11 firmware. 5.11.401.10 seems to work fine with this ROM though.
is the ROM I use. it has T-Mobile wi-fi calling too.
ONE // 5.11.401.10 // S-OFF // 18.104.22.168 // HTC™