Hello,
I use dual sim on my Pixel 8 Pro on GrapheneOS Android 15. One eSIM of Dutch carrier Odido, which works fine. And one physical SIM of Dutch carrier KPN, which does not always seem to work as it should.
At first sight the connection seems strong and reliable about all the time. Never did I experience problems making outgoing calls.
However, when people try to call me on my KPN-number, almost 30% of the time they end up in my voicemail menu without my phone having ringed. I have not yet been able to see any pattern in it: whether someone is able to reach me, seems to be a matter of randomness.
In the past I used an eSIM of KPN brand Simyo which gave similar problems, although less often.
My current SIM network settings are: 4g calling off, preferred network type "5g (recommended)".
Does anyone have any tips or advices? Thanks!