Jolla Phone 2026 - 2G calls are incomprehensible to other side

Bug Reports
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1

REPRODUCIBILITY: often
OS VERSION: 5.2.0.16
HARDWARE: Jolla Phone 2026
UI LANGUAGE: any
REGRESSION: unknown (compared to other Sailfish devices: yes)

DESCRIPTION:

When you make a call via 2G, your voice is often incomprehensible to the other side. Descriptions like sounding “underwater”, “in a bunker”, “in a tin can” are made.

PRECONDITIONS:

Have a provider that doesn’t support VoLTE and live in a country where 3G is shut down.

STEPS TO REPRODUCE:

  1. Call someone.

EXPECTED RESULT:

Both parties can hear each other reasonably clearly.

ACTUAL RESULT:

You can hear the other party, but they can’t understand what you’re saying at all.

MODIFICATIONS:

ADDITIONAL INFORMATION:

It seems like this doesn’t always happen, and it only seems to happen on outgoing calls.
It might not be relevant, but in my case, the two people I experienced this with happened to share the same provider as me - one person uses an iPhone, for which my provider does support VoLTE. The other person uses an Android phone, for which my provider doesn’t support VoLTE. Both of these people called me back, and we were able to understand each other perfectly on that second attempt.
I also called a different person with a different provider, who was able to understand me without having to call back.

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2

I have a similar/related problem, in my case this happens especially during incoming calls, at first, both sides understand each other clearly, then i am heared, but not understandable (“underwater” / “from a tin can”, as you describe it), whike i can hear the other side still very clear. After some time, it works again

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3

I observed the same problem in two outgoing 2G calls so far. At least one of these calls was to another telephone network.

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