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[GUIDE] Activate VoWiFi / WLAN Call

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By der_Kief, Senior Member on 24th November 2018, 03:59 PM
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First of all a BIG thanks to edgonzo over at android-hubo[dot]de
He made this possible

This is the instruction to activate VoWiFi / WLAN Call on the Poco F1
Its tested and verfied to work with EU ROM (Oreo & Pie based) and german provider o2 (Telefonica)

Before you read on i want to make clear that I am not responsible for bricked devices !

Basic requirements are root rights to do this mod
Maybe latest 2017 Qualcomm Diag QD-Loader Windows 10 Drivers signed are needed for this to work.

!!! Before doing this Mod you should backup EFS-partition !!!

- download QPST tool and install
- enable USB debugging in Developer settings
- now either go to terminal app and type:
Code:
   su
   setprop sys.usb.config diag,serial_cdev,rmnet,adb
or
adb from PC
Code:
 
  adb shell
  su
  setprop sys.usb.config diag,serial_cdev,rmnet,adb
- connect Poco F1 with original USB cable to PC
- start PDC (from QPST tool) on PC
- Poco F1 should be recognized by PDC (if not install Qualcomm driver and check Device Manager)
- activate corresponding profile (in case of german o2 its DT_Greece)
- install VoLTE & VoWiFi Enabler Magisk module (optional) or activate setting with dialer code *#*#869434#*#*
- restart Poco F1
- Voila

Original thread (in german !)
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24th November 2018, 04:16 PM |#2  
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FAQ:
Q: What are the requirements for VoWiFi
A: A provider resp. plan which includes VoWiFi

Q: How to know if VoWiFi is working ?
A: Put phone in airplane mode and reactivate WiFi only. If you are able to make a call then VoWiFi is working.

Q: Does this only work with MIUI ROM ?
A: No ... its reported to work also on Custom ROMs like LOS, crDroid ...
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24th November 2018, 05:16 PM |#3  
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Thx for this guide! Have been waiting for this.

Does this work with custom ROM (LOS)?
in case of german o2 its DT_Greece? are you sure? german carrier and greece?
24th November 2018, 06:00 PM |#4  
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Quote:
Originally Posted by saski4711

Does this work with custom ROM (LOS)?

in german forum there is a user who has it running.... but it seems that LOS has no icon for VoWiFi
But nlow ...

Quote:
Originally Posted by saski4711

in case of german o2 its DT_Greece? are you sure? german carrier and greece?

yes indeed DT-Greece for german o2
I have it up and running ...
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24th November 2018, 07:07 PM |#5  
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Quote:
Originally Posted by der_Kief

in german forum there is a user who has it running.... but it seems that LOS has no icon for VoWiFi
But nlow ...


yes indeed DT-Greece for german o2
I have it up and running ...

Ok thx will give it a shot as soon as I get access to a windoze PC
26th November 2018, 02:05 PM |#6  
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Ok this definately didn't work on my Poco-f1 with latest LOS16 and 8.11.15 vendor/fw. Funny thing that VoLTE now seems to be gone (Device switches back to H+/E). Got it back by restoring efs. Has anyone else been successful with this running custom ROMs? Even without this "hack" I have been able to activate VoWIFI after 8.11.5 update but it didn't work so I guess this depends on FW version.

Two things - a little offtopic though: Any Idea if this can be tried on the MiA1? I suspect that xiaomi doesn't include support in it's firmware for this device at all and I 'm afraid to cripple both my devices (Poco and MiA1) at the end .
Has anyone had success getting HDVoice with BT headsets on the Poco-f1 with custom ROMs? Sorry for asking this here but in the LOS thread I seem to get ignored with this question / bug report.
26th November 2018, 04:47 PM |#7  
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@saski4711
to bad that its not working for you.
It defintively works with EU ROMs based on Oreo or Pie.
26th November 2018, 04:49 PM |#8  
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Double post
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26th November 2018, 05:02 PM |#9  
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Quote:
Originally Posted by der_Kief

@saski4711
to bad that its not working for you.
It defintively works with EU ROMs based on Oreo or Pie.

Yeah bummer. Will give it another shot the next days maybe I messed up somewhere. Isn't this device supposed to get VoWIFI by default with the Pie update anyway? Maybe this will work OOTB with final pie?
26th November 2018, 05:08 PM |#10  
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not works with EU pie rom to me too. from Sri Lanka we have VOWIFI network. tried switching many profiles but not works .
26th November 2018, 05:09 PM |#11  
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Quote:
Originally Posted by saski4711

Isn't this device supposed to get VoWIFI by default with the Pie update anyway?

Dont know ... i'm on Stable EU ROM 10.0.6.0 (based on Oreo)
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