Sim card VS contract phone

[�mermaid�]

I'm looking for some better value!

At the moment I'm on vodafone pay as you talk smartstep price plan, with none of the extra things that have been advertised recently. I would really like one of those pay as you talk sim cards where you top up ten pounds and then get some free texts for that month. Which company has the best value one + it is available online? If not what is the name of it so I can ask for it instore.

Also, with contracts is there one on vodafone which gives you about 100(at least) texts a month (pref 150-200) and about 150-200 minutes for around �15? What's the nearest deal i can get to this even if it is a different network? With a contract can you choose to pay monthly or do you pay in a lump sum, say every 6months?

Thankyou!

[Starbar]

I've found 3 on contract to be best value for money for a number of years mermaid.
At the moment I get 500 any network minutes and 100 texts for �18.00 / month. I've seen better deals than this also by dealing direct with 3 as a new customer.
I have also been told that pay as you go on O2 is a good deal.