in my VollaPhone X23 I use two SIM cards. Both of them work fine on the phone when running on the Android based VollaOS. On Ubuntu Touch Focal however one of my SIM Cards seems to paralyse the whole mobile communication subsystem. The X23 is a dual SIM device, the problem occurs on either SIM slot, no matter if used as the only SIM or in combination with the other SIM card in the other slot. Using my other SIM card alone works fine in either slot. So the problem is triggered by SIM card. The image shows the control center with the offending SIM card in one of the slots. Note the two menu entries for mobile network and mobile hotspot are missing.  that's the way it looks when the other, non offending SIM card is used alone.  I'm new to Ubuntu Touch and I use the system with the Volla Boot Manager as 2nd OS on an X23.