http://www.1st4phonecards.com/lp/win2win/
(I get a whopping £1 for each card sold :)

I've used them for years for calling Asia, and have tried them all, but the Royal Mail one at £5, £10, £20 are the best. You also get a discount if you buy more, and you get 'points' to redeem as money off, but you can take it off the order straight away if you don't wish to save.

They email you the details, unless you want the plastic bit, then you have to wait for the post. They will call you with your first order just to make sure it is you. ;D

I think it work out around 300+ minutes for £20, but can't remember exactly as the wife uses them the most, I usually end up with the odds pence at the end of the card!! :-/ It depends on if your calling a mobile, and the time, I suppose.

On site details are;

Strengths ●
12 Month Card Expiry !!

No Maintenance Fee / No Connection Charge !!

Toll Free 0800 access
Sports information service available

Denomination ●
£5, £10 & £20 card
Service provider ●
Issued by IDT Cards Services Ireland Ltd.
Services supplied by Interdirect Tel Ltd & Teamtalk.com.Ltd
0800 / Toll Free access ●
Yes. Different surcharges apply on a country-by-country basis. Please check with Customer Services.
0845 access ●
Yes.
020 access ●
Yes.
Connection charge ●
None.
Payphone surcharge ●
Yes. 25p/min
Billing by the ●
Minute
Expires ●
12 months after first use (or April 2005 which ever is sooner)
Customer support line ? ●
Yes (9am to 9pm, 7 days a week) Telephone 0800 061 3697
( faults should be reported within 48 hours of occurrence )
Calling to a mobile phone ●
Calls to a mobile phone may be charged differently to that of a standard line. If not shown on the rate table then please confirm with customer services before ordering.

Calling from a mobile phone ●
When calling from a mobile phone there are normally two parts to the call. The international leg of the call is charged to your phone card. Calling the access number is charged to your mobile phone. If in doubt about this charge please confirm the cost to call the access number with with your mobile phone provider.

Call to ●
Virtually all international destinations. If your international destination is not shown you may wish to confirm the rate with customer services before purchase.

Call from ●
UK and 20+ countries

Product Classification ●
Credit Voucher