How to enable Vowifi on Redmi-Note4X(Snapdragon)? - Xiaomi Redmi Note 4 Questions & Answers

It's possible?
I search the website "https://www.qualcomm.com/products/snapdragon/processors/625" ,
Snapdragon 625 - [Integrated X9 LTE (Cat.13up/7down) to support Volte & Vowifi]
so, How to enable this function to work on Redmi-Note4X(Snapdragon)?:silly:
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i got news : Mi /Redmi some devices support VoWifi
Mi Serial:
[X20 LTE- Snapdragon845 LTE Cat.13up/18down]:
Mi-8 Upto Global Stable V.9.5 ROM Support VoWiFi<dual sim1+sim2>
Mi-Mix2s Upto Global Stable V.9.5 ROM Support VoWiFi<only sim1 card>
[X12 LTE- Snapdragon660 LTE Cat.13up/12down]:
Mi-A2 Upto Global Stable V.9.5 ROM Support VoWiFi<dual sim1+sim2>
Redmi Serial:
[X12 LTE- Snapdragon636 LTE Cat.13up/12down]:
Redmi-Note5 Upto Global Stable V.9.6 ROM Support VoWiFi<dual sim1+sim2>
[Mediatek Helio P22 LTE: Cat.13]
Redmi-6 Upto Global Stable V.9.6 ROM Support VoWiFi<dual sim1+sim2>
so, somebody can help to modify some sys-files in lib? I don't know which files can be modified.:crying:

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It depends on your carrier. If your carrier support it then the switch will be visible in the wifi setting. But you could force the switch to be visible regardless of carrier support by adding this to your build.prop. Again, if your carrier doesn't support it then the switch is still useless.
persist.dbg.ims_volte_enable=1
persist.dbg.volte_avail_ovr=1
persist.dbg.vt_avail_ovr=1
persist.dbg.wfc_avail_ovr=1
persist.radio.rat_on=combine
persist.radio.data_ltd_sys_ind=1
persist.radio.data_con_rprt=1
persist.radio.calls.on.ims=1

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fzhadi said:
It depends on your carrier. If your carrier support it then the switch will be visible in the wifi setting. But you could force the switch to be visible regardless of carrier support by adding this to your build.prop. Again, if your carrier doesn't support it then the switch is still useless.
persist.dbg.ims_volte_enable=1
persist.dbg.volte_avail_ovr=1
persist.dbg.vt_avail_ovr=1
persist.dbg.wfc_avail_ovr=1
persist.radio.rat_on=combine
persist.radio.data_ltd_sys_ind=1
persist.radio.data_con_rprt=1
persist.radio.calls.on.ims=1
Click to expand...
Click to collapse
i doubt that this is working.
The necessary system files are missing ( doesnt matter if MIUI or Custom ROM)
I like to be convinced by the opposite

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der_Kief said:
i doubt that this is working.
The necessary system files are missing ( doesnt matter if MIUI or Custom ROM)
I like to be convinced by the opposite
Click to expand...
Click to collapse
Me myself doesnt know either if it'll ever work. But adding those lines to build.prop definitely will force the vowifi switch to be visible in aosp rom setting.

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yeah the switch is visible but has no effect !

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Too bad then. The classic case of manufacturer not enabling chipset supported features at software level.

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when i'm correct there is no Xiaomi device that support VoWifi at software level

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i got news : Mi+Redmi some devices support VoWifi
Mi Serial:
[X20 LTE- Snapdragon845 LTE Cat.13up/18down]:
Mi-8 Upto Global Stable V.9.5 ROM Support VoWiFi<dual sim1+sim2>
Mi-Mix2s Upto Global Stable V.9.5 ROM Support VoWiFi<only sim1 card>
[X12 LTE- Snapdragon660 LTE Cat.13up/12down]:
Mi-A2 Upto Global Stable V.9.5 ROM Support VoWiFi<dual sim1+sim2>
Redmi Serial:
[X12 LTE- Snapdragon636 LTE Cat.13up/12down]:
Redmi-Note5 Upto Global Stable V.9.6 ROM Support VoWiFi<dual sim1+sim2>
[Mediatek Helio P22 LTE: Cat.13]
Redmi-6 Upto Global Stable V.9.6 ROM Support VoWiFi<dual sim1+sim2>
so, somebody can help to modify some sys-files in lib? I don't know which files can be modified.