If you don't have a Chime Credit Card yet, you can order one online. Once it arrives at your home, remove the card from its packaging and follow the instructions included to activate it. On the back of the card, you can use an activation code to activate your account online or by phone, as well as add money to it.
After your account is activated and you've added funds online or over the phone, locate any reload locations that are nearest to you in order to purchase more minutes. You can use a credit card at any of these locations, or add money to a Chime Card at participating retail outlets.