I installed the 5.1OTA and could not get Verizon Enhanced LTE (advanced calling, VoLTE, etc....) to work. I tried what everyone else suggested and nothing made it work (never showed the enhanced LTE setting in the cellular menu). Here are the steps I took in case anyone else is having the same problem.
1. Re-Install radio and bootloader from here: https://www.androidfilehost.com/?fid=95916177934540313
2. Enter the hidden menu using *#*#4636#*#*
3. Go in to Phone information
4. Click the TURN ON VOLTE PROVISIONED FLAG button (wont change)
5. Click the TURN OFF RADIO button
6. Wait a few seconds (for radio to turn off) and then click the TURN ON RADIO button.
7. Observe that the TURN ON VOLTE PROVISIONED FLAG button has changed to TURN OFF....
8. Go in to Settings>>...More>>Cellular Networks and make sure that Enhanced 4G LTE Mode is enabled.
I did all this and I still did not have data while making a call. I had to go to VZW site and go into my account and tell it to activate a device on my current line. I entered the IMEI and it gave me a warning about softcard and then went right back to same screen, When I clicked next it gave me a warning that it was unsupoorted device. After this it all worked perfect although the phone is still not recognized on the VZW site.


Quad cities, Illinois

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