Please enable "Enhanced 4G LTE Mode" (VoLTE) IMS registration for Zenfone 5Z and Vodafone (Germany)

Sputnik5ZSputnik5Z Level 1
edited September 2020 in ZenFone 5 Series

Please tell us some basic information before asking for help:

  1. Model Name: Zenfone 5Z
  2. Firmware Version: Android 10 /Version WW-
  3. Rooted or not: original/not rooted


@ASUS Technical Team:

Please enable the Option "Enhanced 4G LTE Mode" for the VODAFONE Carrier in Germany too.

The option "Enhanced 4G LTE Mode" is not available @Zenfone 5Z and Vodafone says, they have enable VoLTE for my mobile number.

The codes @internet doesn´t help ( "Even though dialing "*#*#3642623344#*#*" mentioned here on the forums enables the "Enhanced 4G LTE Mode", - they do not seem to work. Even in the Phone info app (dialing "*#*#4636#*#*") shows VoLTE and VoWiFi as unavailable in the IMS Registration menu."

The adding of IMS for APN Type doesn´t help.

When i check the IMS Registration status it says: not registred and Voice-over-LTE: not available

I´m using the former flagship Asus Zenfone 5Z with Snapdragon 845 / 8GB RAM / 256GB storage and i "thought" it was worth to spend a lot of money... actualy i think i´ was wrong...


  • Sputnik5ZSputnik5Z Level 1
    edited August 2020

    @ ASUS Support Team:

    The Vodafone Support Team for Germany answered me today, that the Zenfone 5Z is not in their compatibility list for VoLTE (list from 24.07.2020) ->so the manufacturer ASUS has to change "something" =>please update the APN table for Vodafone (Germany) in the next "August" Firmware Update for Zenfone 5Z or please do similar corrections (activate IMS registry & voice-over-lte-availability etc. ...).

    There are similar examples in the older updates:

    Version WW-

    "Updated apn table

    - Removed Ventelo internet/mms APN

    - Updated Sweden Tele2 APN"

    Version WW-

    8."Upgraded APN settings

    1. Add the APN setting of Canada Public Mobile

    2. Modify ASUS APN Setting"

    Version WW-

    2. Enable TWM Volte

    OR: Do you have a functional workaround like the several *#*#123456#*#* codes for the Zenfone 5Z to enable the Enhanced 4G LTE Mode?


  • Hi d.lemkau

    I have forwarded the information to the relevant department. We will keep you updated and your consideration will be very much appreciated.

  • Hi d.lemkau

    Thank you for your waiting. After checking, ZS620KL is not supported by German carriers. Sorry for any inconvenience it may caused. 

This discussion has been closed.