EasyMobile have a great new offer - buy a PAYG SIM card for just £2 - get a further £25 FREE calltime credit.
Plus Rpoints are giving £5 cashback for each separate SIM card purchase through them, so there`s £3 profit per SIM plus all that credit!!
When you`ve used the call credit, if you want, bin the SIM and start using another... a no-brainer really!
Rpoints offer can be found here http://www.rpoints.com/bb/viewtopic.php?p=741252#741252