Yes, I just saw that. It's bundled with a Huawei B311 4G router. However, it's on a 24 month contract (instead of a 12 month that the current special offer £20 sim-only deal is for - that deal ends on Monday 4th Feb I think).
I does show that Three are serious about trying to offer a decent 4G link as a Home Broadband solution, useful for those of us out in the sticks with few other options.
However, I'd still personally prefer getting the Huawei B525 separately with the £20 (12-month) SIM. The B525 has an LTE Cat 6 modem (B311 is Cat 4), and has 4 RJ45 Ethernet ports (only 1 in the B311). It does have an RJ11 phone socket though, as does the B525. It may be that the B311 supports VoLTE though (see below) - however, I think the £22 24-month plan is data only? Not sure.
[EDIT: Not to put it down though, the £22 per month deal, with included 4G router, is still good though as an officially-supported Three Home Broadband solution I guess, just "plug & play" I would think out of the box - and shows Three are looking at the home broadband market. Only Three & EE are at this time - maybe O2 and Vodafone will follow, in time? The upcoming 5G will be an even more viable alternative to landlines, in theory at least - but I don't think those of us in more rural areas will have access to it for some years - it will probably benefit urban areas more.]
I've plugged an RJ11-to-BT adapter (this one:
https://www.amazon.co.uk/d/Phone-Cables/rhinocables%C2%AE-Socket-Telephone-Adaptor-White/B00EVS5UZ2/, there are many similar ones in the £2 to £5 range) into the RJ11 phone port of my B525 router, and by changing the Network Preferred Mode on the B525 from "4G Only" to "4G / 3G Auto", I'm able to make & receive phone calls on the SIM's number, so can use those unlimited minutes too! And the unlimited SMS text messages can be used either via the router's config web page, or via the "HUAWEI HiLink" app that you can install on a smartphone or tablet.
Three do support VoLTE for making calls via 4G, and it's enabled in my area (on LTE Band 20 [800MHz] I believe) - however, they only officially support it on their own supplied equipment at present, so not on the B525 (as yet) - which is why it has to drop back down to 3G to make & receive phone calls.
Incidentally - I'm not in a good signal area for Three - but generally on 4G get 10 - 20Mbps downstream and 2 - 10Mbps upstream speeds, although the downstream has at times dropped as low as 4 - 5Mbps. That's still much better than my 2Mbps ADSL connection though! I'm *hoping* that speeds stay reasonable once the leaves are out on the trees around May onwards (as that, plus weather conditions, can affect signal).
When the weather improves, I'll have to experiment with the positioning of the B525 router (will try the attic too!), plus adding the outdoor Poynting 4G-XPOL-A0001 omni-directional antenna that I have, could help improve the signal. If I had line-of-sight of the cell mast I'd try a high-gain directional antenna. But I can only as yet receive Three 4G on LTE Band 20 (800MHz), which I guess will limit speeds somewhat.
Still a huge improvement over my ADSL though.
The speed of Three where I am is very variable (I've yet to get over 20Mbps down, 19Mbps is my highest so far), and considerably slower than EE (where I usually get 15 - 30Mbps down) - BUT, EE is a lot more expensive with restrictive data caps, so I'd rather have slower speeds but not have to worry about data (I've put a 950Gb data cap on my B525 router as I don't want to go over the 1Tb "fair usage" cap & be put in the "naughty list", LOL - can't see me getting close to that anyway) than higher speeds which mean that I use up a meagre data cap that much faster!
Once all testing has finished, I'll load balance the Three connection with my ADSL via DrayTek 2860.
Good luck to others who are trying the same 4G boost to their broadband links!
Kind regards,
Adam.