No phone (phone radio) on LTE SGP771 (bought in Taiwan) - Xperia Z4 Tablet Q&A, Help & Troubleshooting

I bought a SGP771 (32GB LTE version) with keyboard in Taiwan and I am generally very happy with it. LTE works great (on Bell Canada) with data and I also can send/receive text. However, I am not able to do voice calls (except VOIP) with the SGP771.
Using the "phone status" app indicates that there is "no phone radio". I am assuming that this function was disabled for the Asian market. Is there any way to enable this function?

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is it in the specs?
just my guess:
For phone functionality you also need GSM as a fallback or a provider that supports voice over LTE (starting in Europe with few).
If I remember the specs correctly (DL them from Sony developer site) the LTE in the tablet is only for data.
That is why I bought the wifi-version and tether via my phone. Also one contract less to manage.

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DHGE said:
just my guess:
For phone functionality you also need GSM as a fallback or a provider that supports voice over LTE (starting in Europe with few).
If I remember the specs correctly (DL them from Sony developer site) the LTE in the tablet is only for data.
That is why I bought the wifi-version and tether via my phone. Also one contract less to manage.
Click to expand...
Click to collapse
Hi
You can make voice call with the SGP771
http://support.sonymobile.com/global-en/xperiaz4tablet/userguide/Making-calls/
I not use myself because my contract with my provider is only for data and i don't have an other nanosim card to test
But you can make emergency call with or without a sim card

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sun4energy said:
I bought a SGP771 (32GB LTE version) with keyboard in Taiwan and I am generally very happy with it. LTE works great (on Bell Canada) with data and I also can send/receive text. However, I am not able to do voice calls (except VOIP) with the SGP771.
Using the "phone status" app indicates that there is "no phone radio". I am assuming that this function was disabled for the Asian market. Is there any way to enable this function?
Click to expand...
Click to collapse
try to go to parameters ->More ->Providers and find your providers
Modify your APN providers if necessary.

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@sun4energy and @killdozer56
OK I stand corrected by killdozer56
my only ideas now: try another phone app or flash a ROM for another region
I can use CSIPsimple for voip callls but that is not what sun4energy intended in his first post.

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DHGE said:
@sun4energy and @killdozer56
my only ideas now: try another phone app or flash a ROM for another region
Click to expand...
Click to collapse
I vote for the flash

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killdozer56 said:
I vote for the flash
Click to expand...
Click to collapse
Hi there,
Thanks for all your suggestion. I have tried several phone apps and other things, however without luck.
With my rom version (Korea) of the SGP771 voice calls are definitely not possible, as this function seems to be disabled. I have checked the Service info on the tablet. It's telling me that I am a "global_novoice_user" with "Current Modem Config: /system/etc/customization/modem/amss_fsg_karin_korea_novoice_tar.mbn" etc. (see below).
Seems that I have to flash with a new rom in order to be able to make voice calls. Any suggestions for a "good rom"? What are my chances? What are my risks?
Screenshot from the "Software info" screen of the SGP771 :
Phone Software Version:
1295-4417_28.O.A.8.260
GLOBAL-NOVOICE - user
File System Version:
GENERIC_28.O.A.8.260
Sl Boot Version:
1289-5620 S1_Boot_MSM8994_LA1.2_110
ETS Software Version:
1292-6358_18
Customization Version:
1295-8484_R7A
Active Customization:
1295-8484_R7A
Memory card:
No file found
LTA version:
/lta-label/1297-3144 1-elabel-sgp771-novoice.html
Content Version:
PA3
Type Number:
TM-0061-AV
Touch Firmware Version:
0x0604
Fuel Guage Firmware Version:
The phone doesn't support firmware version read
Current Modem Config:
/system/etc/customization/modem/amss_fsg_karin_korea_novoice_tar.mbn
Color ID:
1

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sun4energy said:
Hi there,
Thanks for all your suggestion. I have tried several phone apps and other things, however without luck.
With my rom version (Korea) of the SGP771 voice calls are definitely not possible, as this function seems to be disabled. I have checked the Service info on the tablet. It's telling me that I am a "global_novoice_user" with "Current Modem Config: /system/etc/customization/modem/amss_fsg_karin_korea_novoice_tar.mbn" etc. (see below).
Seems that I have to flash with a new rom in order to be able to make voice calls. Any suggestions for a "good rom"? What are my chances? What are my risks?
Screenshot from the "Software info" screen of the SGP771 :
Phone Software Version:
1295-4417_28.O.A.8.260
GLOBAL-NOVOICE - user
File System Version:
GENERIC_28.O.A.8.260
Sl Boot Version:
1289-5620 S1_Boot_MSM8994_LA1.2_110
ETS Software Version:
1292-6358_18
Customization Version:
1295-8484_R7A
Active Customization:
1295-8484_R7A
Memory card:
No file found
LTA version:
/lta-label/1297-3144 1-elabel-sgp771-novoice.html
Content Version:
PA3
Type Number:
TM-0061-AV
Touch Firmware Version:
0x0604
Fuel Guage Firmware Version:
The phone doesn't support firmware version read
Current Modem Config:
/system/etc/customization/modem/amss_fsg_karin_korea_novoice_tar.mbn
Color ID:
1
Click to expand...
Click to collapse
You can flash a stock rom from sony for another country. Donwload flashtool and xperifirm to view the different rom version and country

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Does anyone know which models are capable of making phone calls out of the box? Will be using it on t mobile usa.