How does the function machine type letters?

The letters typed by the function machine are as follows

1. Press the # key to switch the input method;

2. If the input method is changed to English, select ABC or ABC according to the situation;

3. As we all know, the two keys are three letters of ABC. If you want to input C, you have to press 2 three times, thus completing the input.

Feature phone (English: feature phone) is a major category of mobile phones. Functional mobile phones can meet the requirements of consumers of many ethnic groups. Some functional mobile phones are used more than ordinary mobile phones that can only be used for making calls and sending and receiving short messages, such as taking photos, playing their own music files, surfing the Internet and using map functions.