No, no special settings are necessary. The LTE modem including the mobile phone card runs without problems in the notebook. It also worked on Ubuntu
Thank you, I understand you
With version 20200624 it is also not possible to use special characters such as the @. If I try to log in to the Play Store with this version, I cannot. I cannot type @ with the physical keyboard and the Android keyboard does not appear at all.
I am offered the configuration of the keyboard. As soon as I click this option, the menu closes. I cannot set the keyboard layout.
When I try to open the virtual keyboard, it does not work because the square is also automatically clicked on, as can be seen in the picture:
you need to enable the virtual keyboard in the settings
So the virtual keyboard is not shown to me. But only in this firmware. the @ sign ⌠Yes, unfortunately I canât change the layout of the physical keyboard, but now that I know that the @ sign is on the 2, it works too. The English keyboard layout appears to be set. Ours looks a little different here:
Yes I see, your Y and Z are also swapped, I believe it is in accordance with deutsche alphabet 
Ahhhhh, - stop, - command back. The virtual keyboard is still displayed. But only if the physical is not connected.
No, the German alphabet works differently. But all other characters are assigned differently. Could we all agree here and now that only German keyboards can be built and sold?
I do not object youâŚ, there are different keyboards for different locales
but⌠cherry MX keyboard switches are, proudly made in Germany 
thatâs why they are so good quality 
Yes, I have a German washing machine and refrigerator
Yes, I am well aware of German engineering, I own a Lamy fountain pen, which my dad gifted me, I have used it for more than 6 years now, and it works great, salute to your countryâs engineering 
I believe Bosch company, right ?
yes ,and Liebherr too
thatâs why they are so good quality
And also have a Volkswagon car, Das auto. 
but let us not deviate from this forum topic 
How realistic is a solution to my LTE problem by Friday evening?
Thomas, in your city you can find craftsmen on ROM assembly, or you can ask someone on the Internet, this is quite possible, but there is a chance that Terry will help you completely, it may take time
well, the product is very âexoticâ. Therefore I rely on the support here. I think Khadas hasnât really sold many devices in Germany yet. The product as such contradicts German preferences. But I have to make a decision and otherwise the device has to be sent back on Saturday morning. It has to run now and not at any time.