Sim card inside (Aldi Talk with XL Internet Flatrate) Battery purely just loaded (20 minutes)
Box using the enclosed USB cable connected to Mac. Device is detected immediately. Software installed.
[...] Called. WAP2 set, set password. Done.
For the Aldi Talk Sim APN etc. were already factory stored as e-plus.
After about half an hour, including 20 minutes of charging, the box was ready for use. Our iPhones, Mac, PC and iPad have all connected easily with the box. The indoor range is impressive. Battery I can give no opinion. I run the box almost exclusively to the mains.
Compounds appear to be stable. Differences in the mobile network can of course compensate n ot the unit.
Conclusion: cheap device with no frills, easy installation and operation.
PS: I am not a PC layman and IT specialist