What can be improved:
- In low LTE receiving it often, that cancel telephone lines started. This is supposedly a general technical problem of the radio protocol. Remedied, under "All Settings" >> "mobile and SIM" >> "SIM Settings" >> to activate "profile for wireless connection" as follows: "Telekom 3G". I had initially "Telekom 4G" activated to benefit from the higher voice quality. But "Telekom 3G" is there a stable, where the LTE field strength is so low that has to be changed during a call from 4G to 3G. It has in this setting in traffic yet LTE speed when LTE available.
- The apps use the possibilities of Windows Phone (still) hardly. For example, the apps could show on the tiles already a pre-departure information. Very good solved eg in the weather app from wetteronline.de. However, most tiles are still very static. Probably because they were loveless ported from Android to Windows.
In summary, I'm extremely happy.