Make payments to a monthly cellular bill using your phone by downloading the carrier's mobile app, logging into your account and following the options to process a payment. You may also access the Web version of the carrier's site and pay through the phones browser or use the automated phone payment system, through select carriers.
Many cellular service providers offer mobile apps to smartphone users that feature the ability to access the customer's account with the provider to view usage, edit preferences and pay monthly bills. Some providers also offer similar programs for traditional cell phones as well. To access these apps, search for the program within the phone's app store or visit the carrier's website to locate a link to the appropriate download page. Install the app and sign into the account as you would on a regular computer, then navigate to the payments page. Choose the bill you wish to pay, if there are multiple, enter the amount and provide your payment details.
Another option is to use the phone's Internet browser to access the carrier's website and make your payment as you would on a standard computer. Some carriers also allow you to dial a special number on the phone to access an automated voice system to pay your bill with a credit card or bank account.