I am shocked and delighted to report that adding "ff" appears to have fixed the problem! You're amazing, thank you.

This is even more OT and I'm going to try and find an answer myself (and ask in a more appropriate place) but I thought I would lazily ask you here since you seem so knowledgeable ...

I have a follow up question that is pretty OT for this forum but I thought I'd try anyway just in case someone can help:

The method to add "on the fly" driver support works really well, but seems to behave differently if the device is connected at boot time.

The 3 scenarios are:

1) Device not ...

Amazing thanks again for your help and this information.

That is amazing, it worked thankyou!

I am evaluating a bunch of similar devices for a project. To avoid having to come back and keep asking you how to do this for each one, I just wanted to clarify my understanding.

I received 2 devices from different suppliers yesterday: the first is the ZTE one ...

Hi thanks for such a quick reply. Here is the output of that command:

Bus 001 Device 043: ID 19d2:0581 ZTE WCDMA Technologies MSM DEMO Mobile Boardband
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor ...

My goal is to be able to issue AT commands in order to send/receive SMS while concurrently using the internet interface. I have seen some instructions for a different ZTE 4G modem in order to switch it into a "serial mode" where it will expose linux devices such as /dev/ttyUSBX but I can't find ...