How to flash a router from Rostelecom to any network?

Question

Computer networks

There is a wifi router from Rostelecom (RT-1W4L1USBn) how to flash it for a local provider.
At the provider, all settings are automatically issued.

Answer 1

Try resetting the router and connecting the router to a new provider. In the router settings, select the DHCP connection. If it doesn’t work out, then I think that you can download the latest firmware from the router’s website and flash it.
This is if Rostelecom made this router itself, then there would be problems, but I think that there will be no problems with connecting this device to another provider.

Answer 2

Try to find the model of your router.
Next, restore the original firmware via telnet.

Answer 3

It has both a WAN for cable connection and ADSL
If the provider provides a cable connection (twisted pair), then:
Entering the interface (192.168.1.1 admin / admin), select Interface settings = Internet
On the tab, consistently set
: Ethernet
Where is the service number - check the box to turn off
Connection mode - Dynamic IP address (do not laugh, this is the translation)
VLAN - turn off