Unless it becomes possible to use my iPad's Tmobile sim, I will still keep my Thinkpad X250's Win7 Pro WWAN (Ericsson N5321 Mobile Broadband HSPA+).
BUT.... Using Lenovo's Connection Manager (and I'm not sure what the alternative would be), the connection ALWAYS drops after 1 to 3 minutes.
I have no idea where to begin troubleshooting this.
Any ideas?
There doesn't appear to be a newer Ericsonn driver
https://support.lenovo.com/us/en/downloads/ds034684