How To Guide Drop calls in Unsupported countries with Sim + eSim [trick] - Google Pixel 6

The problem with muted / lost / dropped calls still exists while speaking on the phone. It has been reported mainly from users who live in unsupported countries and use unsupported carriers without root and magisk. In Greece we have found a tiny trick to get over (not always) this problem by switching one of the two SIM to locked 2G, through the hidden menu *#*#4636#*#*. So, the SIMs setup plays big role and now I'm not facing problems anymore. I have pixel 6 with stock Android 13 (no root) and October's 2022 security patch and my setup is:
eSIM --> Vodafone (international carrier) with LTE & "allow 2G" in settings
SIM --> Cosmote (local carrier) only 2G & "allow 2G" in settings
There are many users that still complained about but there isn't a clear, robust fix for this. We believe that another reason is that pixels don't use 4G for making phonecalls (in unsupported countries/ carriers) but only 3G/2G, so many carriers due to 5G emergence abolished the 3G antennas and the calls go only to 2G. In Greece, most of the users have problem with Cosmote that has totally abolished 3G antennas, while Vodafone still uses them. Hence, the combination of the signal from LTE (4G) which falls to 2G, to make a call, and the bad collaboration of SIM + eSIM remain the problem.
Most of the users were forced to make root & put magisk to unlock the 5G, VoLTE and VoWiFi and that helped to make calls through 4G. This module works ONLY in Vodafone Greece because maybe it' s an international carrier. We also wait for an updated magisk module for Cosmote carrier to unlock the VoLTE/VoWiFi in spite of the 5G works.

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Hello, I'm suffering from this issue too in unsupported country Slovakia with both SIM physical and eSIM from Telekom.
Btw hidden menu triggers with *#*#4636#*#*
I will try this method with 2G only and will give you feedback, thank you for suggestion, it may help many lives
Edit: it didnt help, also tried with 3G only
Guess we will wait for another fix update or its hardware problem

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Graddy01 said:
Hello, I'm suffering from this issue too in unsupported country Slovakia with both SIM physical and eSIM from Telekom.
Btw hidden menu triggers with *#*#4636#*#*
I will try this method with 2G only and will give you feedback, thank you for suggestion, it may help many lives
Edit: it didnt help, also tried with 3G only
Guess we will wait for another fix update or its hardware problem
Click to expand...
Click to collapse
I'm surprised that it didn't help! Try to swap the SIMs if the carrier is different.

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Carrier is the same, one physical SIM is used for calls/sms and second eSIM one for data.
Does anyone managed to fix this issue? Its really annoying, sometimes I cant even accept the calls, but everytime I check signal during drop call/fail there is some signal.
Already tried to join beta of Carrier services app but didnt help.
Thanks for any suggestions
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I have the exact same combination as the OP. I use cosmote for data and Vodafone for everything else. I think that vowifi and volte work with the magisk patch. I use this one https://github.com/swangjang/Pixel-Redbull-Carrier-Patch
Which I believe has the corresponding cosmote mbn.

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arvylas said:
I have the exact same combination as the OP. I use cosmote for data and Vodafone for everything else. I think that vowifi and volte work with the magisk patch. I use this one https://github.com/swangjang/Pixel-Redbull-Carrier-Patch
Which I believe has the corresponding cosmote mbn.
Click to expand...
Click to collapse
Since now, there is no progress. Could you please make a try for Volte with cosmote GR and send us a feedback/screenshot?

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tsoump said:
Since now, there is no progress. Could you please make a try for Volte with cosmote GR and send us a feedback/screenshot?
Click to expand...
Click to collapse
I guess you're right. Cosmote doesn't support volte or vowifi.I was under the impression that both Sims supported it. I rarely use that SIM card for calls anyway. I'll try to enable it from cosmote side and report back.

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I think I found the way to fix my drop calls/failed/no signal issues, hope it helps someone
Just disable 2G on eSIM (for data) and enable only 3G/2G + disable VoLTE for SIM (calls)
Problem seems to be soft bug fighting dual SIM with each other signals...
Here is the official topic with problem
Dual SIM problems when using E-SIM - Google Pixel Community

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Problem seems to be fixed with December OTA