Buy a router and set it as access point for 5 GHz 802.11ac (use a search engine for steps to do this).
More Tweaks to help and see if you really need the 802.11ac access point or not:
Performing all of these tweaks should make your 7260 connection with ATT a lot more reliable.
Use maximum performance on both battery and plugged in for WiFi under power options.
Disable USB selective Suspend under power options
disable PCIE link state power management under power options
use 802.11a/g wireless mode under Intel 7260's advanced options
perform the registry tweak called "scanwhenassociated" (the link for steps is here: [SOLUTION] latency spikes and network unstability ... - Lenovo Community