What prepaid phone cards are the most popular in the UK?

By major, I mean shops you see globally and popular shops a lot of people know about. It doesn't even have to be too popular, just anything that sells phone cards.

is it free to call the usa using a uk phone card on a land line phone, do u just pay for the phone card?????

I will be travelling with my unlocked mobile phone and want to purchase a UK SIM card on arrival in the UK are they available at airports? Also will I be able to download emails on to my Iphone?

I will be traveling around the USA and need to know what sort of SIM only deal, I have a SIM only deal with UK Tmobile 600 talk time minutes, unlimited texting and browsing thats £20 $32 per month. How much would something with that sort of data...

How can I be as wireless for two weeks in the UK as I am year round in the US? We're going to the UK for two weeks. I have an unlocked, quad-band GSM phone with EDGE data. I also have an Option GT Max Express (or something like that), which is a global...

I am doing a feasability study for a new lottery company in the UK. Enclosed is a list of 90 questions for which I need answers. ALL QUESTIONS ARE UK SPECIFIC. A. LOTTERY 1. General i. Is the lottery state owned ii. Is the lottery operated by the state...

We are moving to London and we'd like to bring our American mobile phones to use with whatever British network provider we decide to sign up with. We will no longer have a contract with our US carrier once we move. What do we have to do in order to use...

I want a plan that has NO monthly fees for a rarely used cell phone. This is a follow-up question to THIS question that I asked last week. (Many thanks to everyone who helped - you've given me a big boost up my steep learning curve). And apologies in...