For those who are already subscribed, or looking to subscribe, to one of EE's Unlimited ADSL2+ or Fibre Broadband packages, then it seems as though there are some good bundle deals:
If you take home broadband with a 4GEE pay monthly plan, we'll boost your 4GEE data allowance to a massive 10GB (or 20GB if the 4GEE plan is over £46).
Save a packet with a 4GEE sharer plan for up to four people. You'll get unlimited mobile minutes and text, and you can share your 10GB data allowance.
http://shop.ee.co.uk/bundles-and-offers/household
On the old site, it listed an additional shared 4GEE SIM for £5 p/m when on a 24-month contract, but with no mention of the price for 12-month or 1-month contracts. However, I can no longer see any reference here:
http://shop.ee.co.uk/sharer-bundles . I could phone the helpline as recommended, but to avoid ambiguity I'd prefer to see it written in one of the updated PDFs.
Therefore, when combined with broadband, the 100MB / 500 mins / 500 texts package would offer 10GB for 1 person (or shared amongst 4 people for an increased cost) for £9.99 p/m for a 12-month contract or £12.99 for a 1-month contract.
Depending on the sharer price, this could work out to be more attractive than 2/3/4 instances of T-Mobile's basic package where Sharer plans are not available: £8 for a 12-month contract with 250MB / 500 mins / 500 texts.
Unfortunately, this would still seem to be regular speed 4G (4GEE) rather than Double-Speed 4G (4GEE+).
http://shop.ee.co.uk/mobile-tariffs/sim-only-plans
Alternatively, there are the data-only SIM-only plans which are only available in 1-month contracts:
£16 p/m for 3GB (regular speed 4G / 4GEE)
£21 p/m for 5GB (Double-Speed 4G / 4GEE+)
£26 p/m for 8GB (Double-Speed 4G / 4GEE+)
Boosting the allowance to 10GB by bundling would be not be as great a benefit here, of course.
http://shop.ee.co.uk/mobile-tariffs/sim-only-data-plans