I cannot, for the life of me, get AT&T LTE to work reliably on the wAP. It works about 2% of the time - when it does, it's rock solid and fast until a reboot. I just updated to 6.42.3 and it seems worse (as in won't connect at all). When it does work, I never had to put an APN in. However, I've tried all the AT&T ones (broadband, phone, etc.).
Log just says:
lte1: setting network mode failed
SIM card seems OK - it has actually worked a couple times (some combination of reboots/power cycles). Please help!