@AshTheDash You could use this router to introduce load balancing/failover between two ISPs. In this case the Deco M9 Plus should be in AP mode (to avoid the double NAT in your LAN) and they will...

@Michael325 You can use a PSU like this to do the job: There are different power rates, according to your needs: https://www.aliexpress<dot>com/item/1005001855183032.html

@Andy_P Yes, it's possible to do that with the OEM firmware. Keep the TL-MR6400 in 3G/4G Router Mode (with SIM card removed). Use this guide to configure TL-MR6400 in AP mode - Case 2. Connection...

@davem7 That's simply not possible:

@Gicbern It appears so from the thread in question. There's a post with suggested action from a TP-Link official as well.

@TN192 Yes, the price is a bit bigger but although your ISP provides 1 Gbps downstream for you, your wired backhaul will communicate at 2.5 Gbps - this means faster transfers in your local network.