All sims are pay as you go unless purchased with a contract, the only way a sim won't work is if it's blocked.
Yes. It must be from the same carrier, though. For example, an AT&T sim only works in an AT&T pay-as-you-go, not a VirginMobil or Sprint.
Yes but only on the mobile version. You can purchase a micro sim on pay as you go, that will provide access to the Internet.
Yes, usually. You can get "SIM Only" contracts which are usually better value for money, however you of course do not get a mobile phone every 18 months with a SIM Only contract. You can usually give 1 month's notice on a SIM Only contract to cancel it, without paying any cancellation fees.
It will, but only if the pay as you go SIM card actually works in the phone. Most phones these days tend to get locked to the network they were provided with, and sometimes even locked to the particular SIM they were provided with. Obviously, even if it does work OK, the monthly SIM will still need to be cancelled if you don't wish to continue paying for it.
a prepaid Sim card is a Sim card that you pay as you go AT&t tracfone and t-mobile
It's not possible. You can only block your own sim card by contacting Vodafone and reporting it lost or stolen.
Yup. Just get a GSM model and a pay as you go SIM card.
The phones themselves can be either contract or pay as you go, the sim card determines whether it's pay as you go or not.
An 02 Pay As You Go Sim is a device that one can insert into one's phone that will allow that person to pay for minutes as one uses them instead of a standard monthly fee.
One can purchase an O2 pay as you go SIM card directly from O2 in Exeter. One can also purchase SIM cards at any shop that has a mobile phones section.
Yes you can.
Contact your service provider and they should be able to transfer your Pay and go contract to your sim and cancel your Contract account.