Porting T-mobile VOLTE

[rp3]

Is this possible. I've been in Samsung-world where the t-mobile VOLTE/Wifi settings have been ported from the US model to the international model (which uses a different chipset). How possible would porting VOLTE from the XZ1 to the X Compact and Z5 Compact (or every modern sony phone) be?

 

[mirhl]

First you should wait for the phone to actually come out.
Second you should wait for the firmware to be available.
Last but not least, you should ask in the other's phones section, not here.

 

[VeixES]

According to the Customised US firmware for single sim XZ1 compact https://xpericheck.com/cda/1310-4371 it will load "tmobile_us_ims" modem config which should have VoLTE(maybe VoWIFI also). This config comes from oem*.sin file
Im not familiar if the fingerprint sensor is being also disabled via oem*.sin or not. If its not then you can flash some non-US firmware but replace oem*.sin from Customised US.

 

[pbarrette]

According to the Customised US firmware for single sim XZ1 compact https://xpericheck.com/cda/1310-4371 it will load "tmobile_us_ims" modem config which should have VoLTE(maybe VoWIFI also). This config comes from oem*.sin file
Im not familiar if the fingerprint sensor is being also disabled via oem*.sin or not. If its not then you can flash some non-US firmware but replace oem*.sin from Customised US.

Hi VeixES,

If you look closer at that OEM*.SIN file, you'll see a "/android-config/early_config.xml" file that contains:

<?xml version="1.0" encoding="utf-8"?>
<configs>
   <string-array name="config_packagesBlacklist">
      <item>com.fingerprints.service</item>
      <item>com.sonymobile.fingerprint</item>
      <item>com.fingerprints.fido.asm</item>
      <item>com.qualcomm.qti.auth.fidocryptoservice</item>
      <item>com.fingerprints.fido.asm.product.res.overlay.sumire</item>
   </string-array>
   <string-array name="config_packagesFullBlacklist">
      <item>com.fingerprints.service</item>
      <item>com.sonymobile.fingerprint</item>
      <item>com.fingerprints.fido.asm</item>
      <item>com.qualcomm.qti.auth.fidocryptoservice</item>
      <item>com.fingerprints.fido.asm.product.res.overlay.sumire</item>
   </string-array>
</configs>

The overlay APK's in the OEM file also enable various VoLTE parameters for T-Mobile.
So it looks like VoLTE enabling and fingerprint disabling are bundled into the same OEM.SIN file, which means no VoLTE + fingerprint without unlocking the bootloader.

 

[mirhl]

Does that file get dropped into /data ?
You'd just be required [even only temporary] root in that case.

 

[christogold]

Anyone know if the European firmware disables Band 12? I'd rather have a working fingerprint reader and no VoLTE as long as I can still get data on band 12.

 

[VeixES]

B12 is not disabled. For whatever reason, following bands 18 19 40 42(or less likely 17 18 39 41) are disabled if you are using SIM from following countries(MCC 310,311,312,313,314,315,316,330,332,544)
XZ1 Compact supported LTE bands list:
L1234578_12_13_17_19_20_26_28_29_32_38_39_40_41_42_66

 

[charliebigpot]

If anyone still has questions on the networks in the US:
LTE:1,2,3,4,5,7,8,12,13,17,19,20,26,28,29,32,38,39,40,41
HSPA:1, 2, 4, 5, 6, 8, 19
GSM:850, 900, 1800, 1900

Source: Amazon, it's the sales page for the XZ1 from Sony, scroll down to see the XZ1 compact specs
https://www.amazon.com/Sony-Xperia-Factory-Unlocked-Phone/dp/B074P5FMG6?th=1

 

[andTab]

Anyone know if the European firmware disables Band 12? I'd rather have a working fingerprint reader and no VoLTE as long as I can still get data on band 12.

Not possible as evidenced by the X Compact.

T-Mobile actively kicks phones off Band 12 that don't support VoLTE.
that's why you essentially will get almost no reception.

 

[tlxxxsracer]

I could swear I remembered on the x compact, I flashed UK firmware onto it without unlocking bootloader and got VoLTE

 

[1230m]

Hi VeixES,

If you look closer at that OEM*.SIN file, you'll see a "/android-config/early_config.xml" file that contains:

<?xml version="1.0" encoding="utf-8"?>
<configs>
   <string-array name="config_packagesBlacklist">
      <item>com.fingerprints.service</item>
      <item>com.sonymobile.fingerprint</item>
      <item>com.fingerprints.fido.asm</item>
      <item>com.qualcomm.qti.auth.fidocryptoservice</item>
      <item>com.fingerprints.fido.asm.product.res.overlay.sumire</item>
   </string-array>
   <string-array name="config_packagesFullBlacklist">
      <item>com.fingerprints.service</item>
      <item>com.sonymobile.fingerprint</item>
      <item>com.fingerprints.fido.asm</item>
      <item>com.qualcomm.qti.auth.fidocryptoservice</item>
      <item>com.fingerprints.fido.asm.product.res.overlay.sumire</item>
   </string-array>
</configs>

The overlay APK's in the OEM file also enable various VoLTE parameters for T-Mobile.
So it looks like VoLTE enabling and fingerprint disabling are bundled into the same OEM.SIN file, which means no VoLTE + fingerprint without unlocking the bootloader.

I haven't ever rooted a phone, but have been wanting a Sony phone for a couple years now. If someone found a way to do this, how hard/risky would it be to do?

 

[mirhl]

Thread follows here
https://forum.xda-developers.com/xp...ingerprint-sensor-t3666387/page4#post74088699