Several users, me included, have lost LTE by flashing the CM12 ROM and then doing any other craziness like restoring a backup or reverting back to zv3 via flashtool.
Here is what I did to get LTE back on both CM12 and zv5 Roms
If you reverted back to zv3:
Either OTA up to zv5 and use new root method
or
stay on zv3, use towelroot
Next, with rooted phone:
Install flashify
Use flashify to install TWRP
Reboot into recovery
Flash CM12
Flash Google apps
Boot up
Sign in (google account)
Enable developer options
Enable extra reboot options in dev options (to reboot into recovery)
Enable debugging
Enable installing apps from unknown sources
Enable root
Download change apn from app store
Reboot into recovery
Flash apn fix
(I had to use the first version, the newer one doesn't work for me, here is link: http://www.mediafire.com/download/6i7a53xddoaqixv/Universal_Boost_APN_Fix-R1.zip )
Reboot
Open change apn app
Change port and proxy to 0
*here is the thing that finally worked for me that hasn't been listed in any other "I fixed LTE thread*
change "APN type" to include "hipri" and "admin". On mine, it only showed "default,supl,mms,fota", I looked online for boost apn settings and saw that they had "default,admin,supl,mms,fota,hipri" so I changed that, pressed save, and viola! My LTE kicked in within a few seconds.
Praise the Lord.
Here is what I did to get LTE back on both CM12 and zv5 Roms
If you reverted back to zv3:
Either OTA up to zv5 and use new root method
or
stay on zv3, use towelroot
Next, with rooted phone:
Install flashify
Use flashify to install TWRP
Reboot into recovery
Flash CM12
Flash Google apps
Boot up
Sign in (google account)
Enable developer options
Enable extra reboot options in dev options (to reboot into recovery)
Enable debugging
Enable installing apps from unknown sources
Enable root
Download change apn from app store
Reboot into recovery
Flash apn fix
(I had to use the first version, the newer one doesn't work for me, here is link: http://www.mediafire.com/download/6i7a53xddoaqixv/Universal_Boost_APN_Fix-R1.zip )
Reboot
Open change apn app
Change port and proxy to 0
*here is the thing that finally worked for me that hasn't been listed in any other "I fixed LTE thread*
change "APN type" to include "hipri" and "admin". On mine, it only showed "default,supl,mms,fota", I looked online for boost apn settings and saw that they had "default,admin,supl,mms,fota,hipri" so I changed that, pressed save, and viola! My LTE kicked in within a few seconds.
Praise the Lord.
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