1 A Metro PCS Convenience fee is a fee that is charged when a Metro PCS payment is made at a payment machine, authorized dealer, or over the phone. 2  Payments that are made via the mail, check, money order, drop box, or online do not have a fee.3  Convenience fees are any where from $2 to $3. The table above gives the estimated time required to process a payment for each payment method. 2  Metro PCS usually has very good payment process times. 3  It only takes a couple of minutes if itâs payed online, at an authorized dealer, at a payment machine, or over the phone. 4  However, it can take up to 2 hours.