WORLDSIM is a pay as you go sim mobile service, a good inexpensive service for travelers who can make cheap international calls over 220+ countries.
Calling rate start at 25p/min, you can also receive calls for free in over 55+ countries.
The Sim card will never expire as long as the monthly charge $1 is paid. You can manage your account online and receive free text message after each call informing you about the cost of your call and your credit balance.
For instance, if you are calling from Kuwait to USA/UK the tariffs will be as the following:
Make a call:1.61
Receive a call:1.50
Send a Text:0.35
if you are calling from USA/UK to Kuwait the tariffs will be as the following:
Make a call:0.51
Receive a call:
Send a Text:0.11
For more information check WorldSIM