Choose the 30 day SIM and see what happens.
It will tell you if there are any charges or other changes before you confirm.
This is the checkout page - doesn't say anything about extra charges - not sure what to do! I've been on the contract for 3 years and only ended up being locked into an additional 12 months because I increased my data allowance (I looked back and can't see that it said anything about that locking me into a longer contract). So it seems really unfair for them to charge me!
@Laura94 Well it says you have 14 days to cancel, so I guess you have nothing to lose. You'll just need to keep an eye on things, and if there's a problem you'll need to contact customer service. https://www.o2.co.uk/contactus Don't rely on Live Chat. Call and speak to someone if you need to.
it may be wrth risking but I would choose another tariff. 250MB is next to nothing and as @Bambino says, you have 14 days to cancel.
