I'm working through the Raspberry Pi 3 getting started guide, but on a Linux PC and having trouble. This is for the AT&T Starter Kit with the WNC M14A2A module. The Ethernet interface has a 10.0.0.x address, so my understanding is that it's not connected:
$ ifconfig enx001122334456
enx001122334456 Link encap:Ethernet HWaddr 00:11:22:33:44:56
inet addr:10.0.0.10 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::1217:6946:1d9a:c6a2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:34 errors:0 dropped:0 overruns:0 frame:0
TX packets:370 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:2659 (2.6 KB) TX bytes:89238 (89.2 KB)
I then looked at the troubleshooting section (appendix D) to try to debug. Here's a log:
$ picocom /dev/ttyACM0
Revision: MPSS: IMA3_v10.58.174043 APSS: IMA3_v10.52.174043
I've registered the SIM card, but I don't think that it's even connecting to the AT&T network. I've also tried a few antennas. I'm in a major metro area on the east coast, so I should have a pretty good signal.
Does anyone have other ideas to try?