How to factory reset TP-LINK CR1900 v1.x router – Default Login & Password

The TP-LINK CR1900 v1.x router has Gigabit WiFi, 4 Gigabit ETH-ports and 0 USB-ports. It has a total combined WiFi throughput of 1900 Mpbs.
It is also known as the TP-LINK AC1900 Wireless Daul Band DOSIS 3.0 Cable Modem Router.

TP-LINK CR1900 v1.x default Password , Login & Gateway settings :

Default Gateway IP: 192.168.1.1
Default subnet mask: 255.255.255.0
Default DNS server: 192.168.1.1

How to factory reset (hard reset) TP-LINK CR1900 v1.x :

You can factory reset your TP-LINK CR1900 v1.x in the following way(s)
Through the web interface
Open a browser and navigate to the web interface of the router (see default settings below)
In the menu look for System tools and under there find the Factory defaults option
On the Factory defaults page click on the Restore button to perform the reset.
With the RESET/WPS button
Have the unit powered on
Press and hold the reset (sometimes reset/WPS) button for 10 seconds with a paperclip or other sharp object.
When the SYS led start blinking quickly release the reset button and wait for router to boot back up.

TP-LINK CR1900 v1.x router specifications :

System specs
CPU: n/a
RAM: 256 MiB
Flash: n/a
Custom firmwares: None
Connectivity
WiFi: Gigabit (abgn+ac)
WiFi bands
2.4GHz & 5GHz
WiFi throughput: 1900 Mpbs
WAN
None
ETH
4 x Gigabit ports
USB-ports: 0