[jonifen]

As people have said above... 3 charge 10p per 1mb over the allowance, but T-Mobile don't charge at all if you go over (hence the "Unlimited" tag given to it).

It really is a good deal though for a 12mth contract.

Just got an email from ebuyer earlier though and their PAYG modem on 3 is £69.99 now... then you pay the £10 or £15 per month to get 1Gb/3Gb allowance. If you are going to use it each month though, the contract is still the better option.