It's your router, but they'll send you a jiffy bag to "recycle" it. In other words, they want the router that they've made you indirectly pay for back, so they can charge another person for it. Fat chance, BT!
It won't be much use on other networks, as most BT routers (and certainly the newer Smart Hub model) are locked to BT Retail, not even just BT Wholesale. So it's not much use anyway. My advice - sell it and get a bit of money for it.
Current connex, modem etc.:
Zyxel VMG8924-B10A VDSL2 modem/router & dual-line AAISP/Sipgate SIP modem
AAISP Home::1 80/20 150GB + copper pair on TTB backhaul (by request, Terabyte tariff when/if needed)
Sync 79987/19998 kbit/s, attainable ~88000/31000 kbit/s via 120-150m 1985 copper to ECI Cabinet 14, Milford Exchange (WMMFD)
& IPv6 (soon)
Wanadoo ~2Mb (Orange takeover) > Freedom2Surf ~4Mb (TalkTalk takeover) > Virgin Media 10->30->50->70Mb (excess connex) > BT Inf 2 80Mb (04/17 rises, no offer) > Virgin Media 100Mb (awful pings
) > AAISP 80Mb