Here's a quick reference guide on how to make calls using your OneSimCard International Cell Phone when making calls both within your country of stay and internationally.
It's important to remember that phone numbers given to you by locals will most likely be given to you in a local calling format. However, your OneSimCard phone requires that you always dial as if dialing internationally, even when making in-country calls.
You are in France and need to make a call to another French phone. The number you were told to call is 01-4553-5444. Referring to the table below, you will see that in France you need to remove the 0 and add the country code in front of the number to make this call. So, you would actually dial +33-1-4553-5444.
Select the first letter of the country you are calling to see the instructions: