WRT1900AC
AC1900 Dual-Band Smart Wi-Fi Wireless Router - Mamba

The Linksys WRT1900AC router has Gigabit WiFi, 4 Gigabit ETH-ports and 0 USB-ports.
It is also known as the Linksys AC1900 Dual-Band Smart Wi-Fi Wireless Router - Mamba.It also supports custom firmwares like: dd-wrt, OpenWrt

WRT1900AC router specifications (specs)

Linksys WRT1900AC review (quick overview)

Here is the quick comparison of how the Linksys WRT1900AC compares to other routers on our site:

Hard reset instructions for Linksys WRT1900AC

If your WRT1900AC router is not working as it should, dropping connections or not being responsive, you should first do a reset of the router to see if the problems persist. Other scenarios where you might want to reset your router is if you've forgotten the password or misconfigured it and can't get access anymore.
Your can reset your Linksys WRT1900AC in the following way(s):

Through the web interface

1. Open your browser and navigate to the router interface (check default settings below)
2. Under the Administration tab you will find a sub-tab called Factory defaults
3. On the Factory defaults page click the button labeled Restore Factory Defaults

With the reset button

1. Have your unit powered on
2. Press and hold the reset button for at least 10 seconds until the power light starts blinking, then release.
3. When the power light goes solid, unplug the power to the router for 10 seconds
4. Plug the power back in and start the router
5. When the power light goes solid again the router is ready to use.

The 30-30-30 reset

1. When router is powered on, press the reset button and hold for 30 seconds. (Use a paper clip or something sharp)
2. While holding the reset button pressed, unplug the power of the router and hold the reset button for 30 seconds
3. While still holding the reset button down, turn on the power to the unit again and hold for another 30 seconds.

This process usually works for resetting any router to it's factory setting. If that doesn't work be sure to check out the questions and answers incase someone else has had similar problems resetting their router.

Note: It is worth reading more about how to reset routers with the 30 30 30 reset and what the risks and considerations are when resetting your router this way, instead of just rebooting it.

Default factory settings for Linksys WRT1900AC

WRT1900AC Firmwares

Staying up to date with the latest firmware is a good idea to keep your router even more secure from various security flaws.
If you want to squeeze a little bit of extra functionality out of your router, consider flashing an open-source firmware like dd-wrt, openWRT or LEDE. Flashing a custom ROM can greatly increase the stability and functionality of your old router.
Following are the firmwares that we have identified existing for the Linksys WRT1900AC:

Flashing dd-wrt on the Linksys WRT1900AC

Since the WRT1900AC has 128 MiB of flash memory, you should be able to run dd-wrt with full functionality without having to worry too much about which firmware to use. We haven't find any specific instructions for flashin dd-wrt onto the Linksys WRT1900AC, but you can read the Installation guide over at dd-wrt to get a clue on how to proceed (As this model is listed as supported).
Note: Always make sure to read the wiki and howtos of dd-wrt before doing any flashing.

Flashing OpenWrt on the Linksys WRT1900AC

The Linksys WRT1900AC is supported by OpenWrt according to their Table of Hardware. So flashing OpenWrt onto it should be quite straigthforward.
We couldn't find any specific instructions for flashin OpenWrt on the Linksys WRT1900AC, but since it's listed in their Table of Hardware as supported, you can head over to the OpenWrt install instructions and read on there.
Note: Flashing custom firmwares is always on you're on own risk. Make sure to read OpenWrt's wikis to understand the risks and how to proceed if something goes wrong.

Linksys stock firmware for the WRT1900AC

Stock firmwares for the WRT1900AC are available under the download section on the modem's support page. You can also refer to the router's manual for instructions on how to upgrade the firmware.

Similar routers

WiTi Board

X10R

Acrux1200 (ARL02124U1)

Smart Hub

Almond+

AirStation WSR-1166DHP