Upgraded to IOS 8.1, and now getting only "extended" cellular instead of LTE

Question

after I upgraded to IOS 8.1 on my iPhone 5s, I now am only getting "extended" coverage instead of LTE.  I have restarted, and still it will not pick up the LTE.  No problem before upgrade, 2 -3 bars.  What happened??  How do I fix it??  thanks in advance for any help.

Answer 1

1) IMPORTANT- If you are using a Vzw Network Extender in your home or office, since update of iOS 8.1 you will always see extended mode on your phone, no matter what, for now. (4g HD calling not yet available through Vpn tunnel)
2) 8.1 apple update defaulted all the iPhone cellular mode LTE setting to data only.  to fix, go to settings> Cellular > Enable LTE > Select Voice & Data. a check mark should appear within 30 seconds and Verizon will reappear on iPhone. If the check mark appears you are now back on Vzw cell network and have High Def calling. If not - complete a "hard reset on the iPhone" Do this by holding down your power button and home button until you see the apple logo on the screen, This actually disconnects the battery on the phone and forces the sim card to reach out to the towers and reinitialize settings.
If this does not work, toggle on and off Airplane Mode
If that does not work; go to settings> General> Reset> Reset Network Settings
Now if after all that your check mark does not appear or you get a pop box on the phone that says "call Vzw to enable LTE calls" then here is the solution:
Call Vzw, have them add the following 3 codes on your account:
A) Advanced Calling 1.0 - Vzw Feature Code 81143
B) High Def Voice - Vzw Feature Code 81158
C) High Def Access - Vzw Feature Code 81186
If you give the Vzw rep the three feature codes it will make your life easier because this is a very new issue!
Now you can hard reset and select LTE Voice and Data and get back on the Vzw Network