The solution from post #22 (Link) doesn`t work for me. I tried it with the firmware 0.9.1 0.4 v0089.0 Build 220329 Rel.61109n(4555) and the beta firmware from post #22.

I get always this in the 3G/4G Settings: USB 3G/4G modem: Unknown

USB 3G/4G modem: Unknown

PIN Status: Unknown

Location:       Germany

Mobile ISP:    Vodafone(Germany)

This is my logfile:

2022-09-06 12:17:57 [6] 3G: Hotplug: id[0]=12d1_15ee_0123456789ABCDEF, class[0]=switched_3g, action[0]=remove
2022-09-06 12:17:57 [6] 3G: Hotplug: 12d1_15ee_0123456789ABCDEF, not the used switched_3g device.
2022-09-06 12:18:14 [6] 3G: Hotplug: id[0]=12d1_15ee_0123456789ABCDEF, class[0]=switched_3g, action[0]=add
2022-09-06 12:18:17 [6] 3G: 3G/4G Modem vendorID: 0x12d1; productID: 0x15ee
2022-09-06 12:18:17 [6] 3G: init E3372h-320(0x12d1-0x15ee)
2022-09-06 12:18:29 [6] 3G: 274: go to already_switched.
2022-09-06 12:18:30 [6] 3G: 525 File:
2022-09-06 12:18:33 [6] 3G: 1111: already switched, but no valid interface! go to handle_unsuport.
2022-09-06 12:18:33 [3] 3G: 649: after_switch not succeed error.
2022-09-06 12:18:33 [6] 3G: 669: Modem Unsupport.