extender uses different password to router and router won't accept wifi password
Hi I recently bought an RE300 extender that supposedly is part of the mesh network. It connects to my wifi but does not use the same password. My wifi password was set up by my wifi company, but the extender uses the password 'testtest'. this means its constantly logging me out of my network as i walk around my home and making me type in a different password depending on where I am.
I also for some reason can not connect my router to the tether app. it says the password is wrong, ive tried 'admin', 'testtest', the number written on the bottom of the router, and my wifi password and it doesn't recognise any of them and has locked me out from any further attempts.
Should I reset the router and try again? Will it automatically know the wifi company I am using? Not a very tech savvy person so apologies for using the wrong words!