If you ever run into any problems, hang up and try your call again. If the problem persists, immediately end your phone conversation and contact customer service.

6.1) Contact phone card retailer
Let them know what the problem is so they can alert the service carrier to get the problem fixed.

6.2) Always report any problem
Possible problems are:

• Poor line quality
  
• Inconsistency in phone card minutes (+/-)
• Problems with an access number
• Problems with a valid pin number
• Purchase/transaction problems