As I said, Go Binge does not come out of the data allowance on Advanced contract plans, with at least 12 Gbyte allowance, in the UK.
Elsewhere in the world it does.
QED Go Binge is a UK only product. There is no such thing as Go Binge elsewhere in the world, despite Three's marketing. Be aware that:
"Some additional content, including adverts which are embedded in these services, may come out of your regular data
allowance "
It's all irrelevant if you have unlimited data already, as you do.
When using a mobile with WiFi calling your calls are made using whatever mobile contract you have. They are not free. You need a compatible mobile with WiFi calling capability (rare on Android), a mobile contract on a network that supports WiFi calling, you pay for your calls with that, and the 'phone number is that of the mobile. Having to leave WiFi turned on drains the
battery.
It is not a substitute for a house 'phone setup with multiple handsets, unless you are a single person and carry your mobile with you at all times.
As with VOIP, you would require a separate contract with the VOIP supplier, buy extra kit, plug it together, configure it, and pay for your calls through them.
The trick that Three are missing is that Home Broadband is a data only package. It is not a substitute for a traditional landline phone/broadband package.
Whereas if they enabled the POTS connector, and supplied an unlimited phone call package as well as the data, it would be a true replacement.
Disconnect landline router. Plug house phones into POTS connector of new router. Cancel landline contract(s).
A straightforward product, one contract, one phone number, no user configuration needed, unpack, plug in, turn on. Anyone could manage that. Fixed price, no extra bills. Completely replacing the landline.
Attractive to anyone who doesn't want to commit to taking on a landline contract, or who has poor broadband speeds that would be transformed in a good mobile coverage area. Mobile people, students, rented properties on shorthold tenancies, static caravans, UK motorhomers and caravanners.
When travelling take it with you and set it up in your hotel room, motorhome, bedsit, b&b. campsite.
Operate just as if you were at home. Friends, business contacts just have one number to remember.
Package it into something like a
Mifi with decent internal
battery that also acts as a UPS during power cuts, external antenna connectors, maybe even incorporate a DECT base station to pair with your DECT house phones then you wouldn't even need to plug into the POTS connector or have household phone wiring. Supply optional DECT handsets with it ready paired, chargeable with micro USB or USB C, no cradles needed. Make them the long range sort.
Even offer a service to port your landline number across.
There are people already doing this for themselves on other forums, mostly using a B325 or a generic B311 with a Three unlimited everything phone SIM. The one Three supply is locked down with bespoke Three firmware, but otherwise capable, it still has the POTS connector on it, albeit disabled.
Three could block the use of phone SIMs in routers etc. but for the time being it seems they haven't.