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
Buy a router and set it as access point for 5 GHz 802.11ac (use a search engine for steps to do this)
Sorry if this is a stupid question, but would the new router be a complete substitute for the Uverse router, or used in addition to it ?
Here's the reason for the dumb question: When I originally asked ATT about getting my own router, they told me third party routers won't provide the all in one capability needed for U-verse bundles of phone, TV and internet, whereas their router is designed to handle three services with one unit.
You keep the Uverse router since ATT uses this for their Uverse TV, etc.
You just extend your WiFi by attaching another router to it (configured as access point).
See the pic below
Think of Uverse as the wired or wireless router. Then you attached a router in Access Point mode via Ethernet. Your router in AP mode can then broadcast WiFi in 802.11ac, bypassing the 802.11g limitation of your Uverse. AP mode in a sense is like your cell phone on the WiFi hotspot mode turned on.
Wow, thanks for your help. I'm assuming the RT-N12 pictured above is simply for illustration and not the desired router.
So if I'm understanding this correctly, I buy an 802.11ac router and connect it to the Uverse router via ethernet cable. Then, on my laptop, check for available wireless networks and connect to the new router? Would that require a different security key be entered.
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Yes you will have TWO WiFi networks. One is the Uverse "ATTxxxx" SSID where x is random number (this is coming from the Uverse router) and another one is your customized SSID and password for your 802.11ac router. You can connect to both WiFi and you should be able to see all your devices regardless. Also, your customized SSID will only be broadcasted on the 5 GHz frequency since 802.11ac only works on 5 GHz while 802.11g only works on 2.4 GHz band.
You will also have different IP for your 802.11ac router. Make sure that the IP for your 802.11ac router is on the same subnet as the Uverse gateway.
Instructions from Belkin covered pretty much on how to do it here:
Here are different scenario that you might encounter with different brands:
If you buy an ASUS or Netgear, you must use the AP Mode that they provide. This is the easiest AP mode setup out of all brands and setup should be trouble free.
If you buy a Linksys, there's no AP mode. You must follow Belkin's tutorial and choose option 2: Disabling the DHCP Server per tutorial page. The IP address must match the subnet of the Uverse router, but the last digit must be out of the DHCP range. This might be a little complicated for someone who never tinker with router settings.
Hope this helps