What are monthly charges for smartphones?

Monthly charges for smartphones typically include the cost of the device itself if financed, along with a service plan that covers voice, text, and data. Service plans can range from $30 to over $100 depending on the carrier, plan features, and data limits. Additional charges may include taxes, fees, and optional add-ons like insurance or extra data. Overall, the total monthly cost can vary widely based on individual choices and promotions.