In order to pay your Metropcs phone bill online, visit the Metro PCS homepage using your favorite browser and click the tab "Pay My Bill." You will be directed to a page where you will choose from a few different options on how you would like to pay your bills. Choose the service and fill in the details needed. Get the print out and keep it in case anything goes wrong. Wait up for a few hours and your Metro PCS phone will be active. For additional details, visit http://www.ehow.com/how_4857594_pay-pcs-phone-bill-online.html.