You can use any router that meets the specifications. However, TeleKom devices often have problems setting up telephony. Use the search function in the forum with the router type to find the appropriate settings.

A factory reset is necessary before setup!

Hello @trishen ,

welcome to the o2 Community .

You can generally use a router that you have from a different company or that you bought privately. As Klaus_VoIP has already said, the important things you should consider are the specifications of the model of router that you want to use and that some of the devices have issues with telephony. If you think these will be no issue then you can of course use the router with a connection from us, and if you need further help, please let us know.

Kind regards, Sven