EM7421 - no service (o2 Germany)

Update: I installed another Firmware: 9999999_9907259_SWI9X50C_01.14.22.00_00_GENERIC_002.057_000.exe

and it magically worked!

thx yall and thx yjjyijyjyy
I installed all drivers correctly,

But under connection menu it shows “No Service”

How to troubleshoot?

There are no Uknown devices in Hardware manager, but WWAN seems to be missing there.

I installed drivers through right clicking the swsd007421Fujitsu.inf file in here:

FTS_SierraWirelessEM7421WWANDriver_93251920001_1261599.zip (5.1 MB)

There is no modem port …