There seems to be a misunderstanding. The OP of this thread was referring to other ATA's or SIP devices as opposed to home routers. His wording was confusing to say the least. You are not required to buy any "routers" from Voipo. Voipo ships you a leased ATA for free. Voipo will gladly give you free support for connecting their ATA's to your own router if needed.
You are allowed to connect your personally owned ATA or SIP device (aka BYOD), but Voipo provides limited or no support for these devices as the OP was referring to.
Bookmarks