Hi
I came across this site tonight which I thought maybe of interest to some members here.
www.fullofjuice.comI haven't used it as of yet. If you do use it then please provide feedback for others.
I believe the number which the sms needs to be sent to (07937) is inclusive from O2. Double check to be sure. The destination number you first dial, will be allocated to your 0203 access number.
You will need to send a sms each time for each destination number.
Free calls to selected destinations, 60 mins max per day per number.
Seems too good to be true, as it has 0845 numbers inclusive (Precaller/callcashback)
Jagga303