@arubislander Thanks for the reply. Hardware issue? Could be! The strange thing about all this is that there was no constant deterioration. It was more up and downs. One version worked, then one worked unreliably, then one worked, and with version 1, I appear to be almost completely lost. That's why I was wondering that it might be a good idea to ask here if anybody could confirm a problem - or not confirm it. Had there already been anyone telling me clearly that their Faiphone 4 actually worked with version 1, I would have contacted the shop that sold that new mobile to me lately. ... But I am not the only one that has a Fairphone 4 with UT on it, I suppose? Well, I think I'll wait one or two days more. If nobody replies, I will try another 'daily'-version ... and then report.