This smart SMS service is a function of Huawei mobile phones. By activating this function, it can provide convenient service menus and services such as recharge, repayment, quick replies, and reminders. Text messages only have dry text, but smart text messages are card-style text messages that can provide scene services. If you want to learn more about smart text messages, I recommend you Rainbow Cloud Letter. Smart SMS menu service setting method: SMS - Menu - Settings - Smart SMS Service - Click to turn on "Enhanced Service".