I am sorry for the new post but I can't edit the old post.

So,.... when you compare the average prices and you have say 300 minutes of outgoing calls every month with your TravelSIM, you have a average price of outgoing calls from 36 Pence per minute. That makes a total of about 1188 Pounds within 11 month of business usage in one year.

With S4T you have a average price of 25 pence per minute outbound call, this leads to a total of 825 Pounds plus your "daily charge" fee (25 working days each month, 11 month every year makes a total of 107,25 Pounds). So you pay in total with S4T 932,25 Pounds.

That makes a difference of 255,75 Pounds!

In short words SIM4Travel is 21,75% cheaper then TravelSIM.