Originally Posted by barrygeorge001001
That guy is full of it. But after some trial and error I got it working and have full 4G speed.
In build.prop change or add these if they dont exist
Also open the /system/customize/ACC/default.xml file, is a boolean variable “sku_id”. Change the value of “sku_id” to the t-mobile one. Then save the file, and reboot your device.
<item type="integer" name="sku_id">11</item>
Then go into the *#*#4636#*#* menu with the phone dialer (it will be enabled now) and change the network type to "GSM/WCDMA/LTE auto"
I found out something tricky with this phone, "ro.ril.gprsclass=14" was causing my phone to hang on boot so I kept resetting it with the hardware keys so after I got it booted up, I proceeded to delete the ro.ril.gprsclass=14 in buildprop or sometimes the phone would delete it first and second I spotted a key that looked similar to "ro.telephony.lteOnGSMDevice=1" in buildprop which was "telephony.lteOnCdmaDevice=1". Noticed the CDMA wasn't all Caps????. So I modified the Key in buildprop to look like this "ro.telephony.lteOnGsmDevice=1", only the "G" is capped in GSM......And After I did that I restarted the phone and after it booted, I proceeded to phone test menu and changed it to "GSM/WCDMA/LTE auto" and boom I've noticed the "4GLTE" showed up in my status bar so I did a speed test and surely I was getting 30 Mbps Down and 10 Mbps Up. One other good thing is my MMS IS WORKING!!!!!!! just ass fast as an SMS!!!!!
The Rom I'm Using Is: NuSenseSIX-LP_t6_RC18.104.22.168_11132015
UPDATE: Everytime you restart your device, the test menu reverts back to "GSM prl" so just put it back on "GSM/WCDMA/LTE auto" and your LTE will return.