So as of today Vodafone has changed the way they do things.
They now have three voice options.
Month to month sim only
12 month sim only (double data of m2m)
Month to month red plan with handset
The handset plans are double data of standard m2m (some have special data offers)
You pay for the handset in 12,24 or 36 monthly instalments (interest free)
If you choose 24 or 36 month instalments you get a plan discount (not all handsets and it varies)
You can change te plan anytime (might loose discount not sure)
And you can leave anytime by simply paying out the handset.
International call allowances have changed a bit too.
Still have access to $5 roaming on all plans.
They have always had this option but it was not sold very much and now they have mixed things up a bit and made it the only option.
So apparently now they call phone subsidy interest free purchase.
You end up paying the same but it is now easier to get out of the contract. I think it is quite clever as previously, you pay less for the phone, but higher for the phone plan. The 60$ red plan seems pretty good.