A common cause of problems with international calling is a lack of account funds. Here are 3 easy ways to check your account balance:
Log into Your Online Account: This is the easiest way to get information related to your account, and you can access it at any time.
Text BALANCE to 6700: You will receive a text message with all account balance information.
Call Customer Care: Dial 611 from your Mint phone to ask a Customer Care representative about your account balance.
If you find that you have international calling credit, another common cause of problems is an incorrect country code. Make sure that you are dialing 00 or + before the international number that you intend to call.