A tail of woe, I bought my two daughters two used iPhone 5s (ATT models), and tested them out before giving it to them. After we got to the ATT store and the new phone lines were activated, we noticed on the way home, they're only 4G. No LTE. I was on the chat with ATT support for about 40 minutes to no avail. His last effort was to contact the group that manages IMEI numbers to make sure they're properly on the network for LTE. This makes no sense for the following reasons 1. I put my SIM in the phones, I get LTE. 2. I put their SIM in my phone, I get 4G only. The problem is related to how the SIM is defined on the network. Now about 5 hours later, one of the phones started getting LTE, but not the other. This morning nothing has changed, one is still 4g. Looks like I'll be calling or seeing ATT once again.