Peplink Balance 20X with Cat 7 LTE Advanced Modem with Primecare
[BPL-021X-LTEA-US-T-PRM]

It works, after I spent several days figuring it out.
Somewhat expensive replacement for the Surf SOHO, which effectively became E-waste after the malware that attacks routers with Firmware 8.3 but not 8.4.
Like many people, I really wish the manual had more explanation of the various features, for those of us who are not networking professionals.