VoLTE for Xperia Z & Xperia X series.

Dilesh Perera

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May 26, 2012
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Is there any technical reason why showing modem switcher won't work?

I followed your guide and am able to get VoLTE showing up in the mobile network settings section, but get stuck on being able to run the modem switcher activity.
This issue probably with QuickShortcutMaker with Z3. we Z2 users have no issue with creating the shortcut for Modem Switcher and using it.

try App Shortcut Maker . its working well with Z2
 
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golden7

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Apr 30, 2016
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Is there any technical reason why showing modem switcher won't work?

I followed your guide and am able to get VoLTE showing up in the mobile network settings section, but get stuck on being able to run the modem switcher activity.
I don't know technical parts, but I have discovered that if you wipe Dalvik-art and Cache (via Recovery) the Modem Switcher shortcut/app works one time (only), and allows me to pick new modem. After reboot, the Modem Selector then flashes blue, FC without opening.

If I repeat wipe, the modem software shows default modem file. Maybe a permissions issue or modem is selected during app optimization? I don't know, but have made sure system RW and followed instructions closely.

I also tried renaming the VoLTE modem (256k) file with name of my default modem file (original 776k), and allowing MM to select default. Didn't work with tmob in USA with D6603. Running Fragment ROM v2 (291), Gustavo's modified stock kernel.
 

raginginferno

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Apr 24, 2011
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Just want to report here as well. Managed to get VoLTE working on the D6603 Z3 thanks to these instructions. In Canada on the Rogers Network. Running latest build of Marshmallow and using "Generic GLOBAL" firmware. I had a few more details on the Z3 specific thread on that side of the forums. It's pretty much these instructions in the first post.
 

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Dobsgw

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Dec 16, 2015
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After selecting the VoLTE modem and enabling VoLTE (seems to work) I can't open CustomizationSelector anymore. Just force closes now. Any simple fix?

Oh just saw the dalvik cache thing. I'll try that.
 
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akshay2shah

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Mar 10, 2016
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Just want to report here as well. Managed to get VoLTE working on the D6603 Z3 thanks to these instructions. In Canada on the Rogers Network. Running latest build of Marshmallow and using "Generic GLOBAL" firmware. I had a few more details on the Z3 specific thread on that side of the forums. It's pretty much these instructions in the first post.
good to know its working !

If u had taken those apk from this thread then u would have gotten VoLTE on icon on status bar and incoming call ui icon like attched in screenshot !
 
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raginginferno

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Apr 24, 2011
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good to know its working !

If u had taken those apk from this thread then u would have gotten VoLTE on icon on status bar and incoming call ui icon like attched in screenshot !
Oh... Didn't realize that. I had modified the files myself a while ago and they were still on my phone's memory card. Was lazy and just grabbed it from there :p

Maybe I'll try your files later the next time I'm experimenting with stuff. :)
 

Dobsgw

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Dec 16, 2015
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There must be another step for Z3 as the modem won't stick and customizationselctor crashes. Renaming the files also doesn't work.

You don't need to wipe dalvik on X Z3
Only cache to make it work again.
Still though the modem is always stuck on the degault
 
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akshay2shah

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Mar 10, 2016
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There must be another step for Z3 as the modem won't stick and customizationselctor crashes. Renaming the files also doesn't work.

You don't need to wipe dalvik on X Z3
Only cache to make it work again.
Still though the modem is always stuck on the degault
Download sintel Singapore fw.
That version support VoLTE by just changing modem in z3.
Confirm model no with your before flashing.
but only works for d6653. or else u have to find baseband for d6603.
 
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akshay2shah

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Mar 10, 2016
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Has anyone managed to get this to work on Three UK?

The website shows that they have VoLTE, but by reading the page it seems to be only for certain devices. - http://www.three.co.uk/Discover/network/4G-Supervoice
I have followed the OP and have set my Z2 to VoLTE but i'm still only on 3G or 4G. No overlays are showing. Permissions are correct and build.prop has been changed correctly.
Exactly !
Its locked to certain devices ! As mentioned , it wont work for u !