Since noon yesterday, there has been a change. Outside in the open 3-4 bars of signal strength. Phone calls are possible without problems. I am well understood and understand the person I am talking to very well. However, it still switches immediately from LTE to 2G.
Today I tested it again while walking around here in the neighbourhood and again 3-4 bars of signal strength and very good call quality. But again 2G instead of LTE.
At home in the flat and on the balcony I still only have 1-2 bars and calls are difficult. Something seems to be interfering with or shielding the signal. Maybe the thermal insulation of the house. But that’s fine with me. The less radiation comes into my flat. And here I can be reached via the landline phone anyway. The Pure is mainly for on the road.
I have no idea why it suddenly works so well, but it can stay that way. Add voice over LTE at some point and I’m happy (not because of the quality, but in case 2G is switched off here).