GM Wi Fi 4g LTE on without using the accessory option.

ktmrfs
"when you didn't have wifi were you in ATT service area. not sure about the east coast, but in midwest and west there are a noticeable number of areas outside of major towns where ATT or verizon don't have any service, or wifi is 1x or 3G at best."
Yes I would say so as on our way back the WIFI from ONSTAR worked ok in both those locations, it must have been a glitch in the ONSTAR or like at the border when the Border Officer asks "Is that a Canadian or American cat?"...too funny!.....LOL