Thanks, someone else mentioned a Poynting. I found this about frequencys. One A&T page (AT&T PREPAID℠ SIM Card Kit (Phone)) says "AT&T uses a GSM based network operating on the following frequencies/bands: 4G LTE – 700/ 850/ 1900/ 1700/ 2100/ 2300MHz Bands 2, 4, 5, 12, 17, 29, 30, 40, 66."...