Mobile data suddenly gone

[epiii2]

I've been using my new PinePhone for about a week, and then this morning I noticed my mobile data connection wasn't working.  Calls and texts are still fine, but, no internet.  I don't know if it's a firmware/hardware/service issue, but I'm pretty sure it's not software because I've tried multiple OSs and they're all showing this problem now.

Poking around using typical Linux commands I see that the wwan0 interface is down, but I'm clueless about layers deeper than that, once it gets into modem territory.

Code:

    $ ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
          valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host
          valid_lft forever preferred_lft forever
    2: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
        link/ether 02:ba:7d:21:84:a4 brd ff:ff:ff:ff:ff:ff
        inet 192.168.1.124/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
          valid_lft 3554sec preferred_lft 3554sec
        inet6 fe80::86f8:29c8:ddf7:df8b/64 scope link noprefixroute
          valid_lft forever preferred_lft forever
    3: wwan0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
        link/none

Any ideas?  This is with Verizon in the US with a PinePhone revision 1.2b.