You can adjust the transmit power of the router using the Tomato firmware, allowing it to greatly increase your WiFi signal. I went from two bars outside the front door of my house on the porch, to full strength, just by adjusting the default transmit power from 42 mW to 150 mW. Your mileage may vary, and your router may not allow this change.
Tomato Firmware: Increased Transmit Power Does More Harm Apr 05, 2009 Increasing a Router's Transmit Power - TomatoUSB The aim of most mods is to allow the use of full power on all channels. Tomato firmware, like most others, has a power setting selection up to 251. This is usually taken to mean the transmit power output in milliwatts, but I believe this should sensibly be viewed not as the actual transmit power output level, but only a relative number. Transmit Power setting on Tomato firmware - Netgear Apr 10, 2019
Dec 01, 2009
Tomato Firmware: Increased Transmit Power Does More Harm Apr 05, 2009
Jan 15, 2009
Aug 28, 2015 AC66U_B1 LAN Slower with Fresh Tomato? : TomatoFTW Power off the RT-AC66U B1. Power on while holding reset button (I had to use a pen to be able to hold reset button in) Hold reset button until power light starts flashing slowly. Flash FreshTomato firmware using the ASUS firmware restoration utility. Clear/reset NVRAM again (same as …