The old man sent text messages to exchange letters.

The old man-machine is a kind of mobile phone specially designed for the elderly. Its function is simple and easy to use. Old people sometimes need to switch letters when sending text messages, but they may not be familiar with this operation. Let's introduce it in detail below.

Method of converting letters

Old man-machine usually uses numeric keyboard to input letters, which are realized by pressing keys many times. For example, to input the letter "A", you need to press the number key "2" three times, because "A" is the first letter on the number key "2". If you want to enter the letter "B", you need to press the number key "2" four times, because "B" is the second letter on the number key "2". The method of switching letters is realized by pressing keys many times.

Toggle uppercase and lowercase letters

Old people sometimes need to input uppercase letters when sending text messages, so they need to switch uppercase and lowercase letters. The method of switching uppercase and lowercase letters is also very simple. Just press the * key to switch between uppercase and lowercase letters. If you want to input the capital letter "B", you need to press the "*" key first, and then press the number key "2" four times.

Toggle numbers and symbols

Old people sometimes need to input numbers and symbols when sending text messages, so they need to switch between them. The method of switching between numbers and symbols is also very simple. Just press the "#" key to switch between numbers and symbols. If you want to input the number "1", you need to press the number key "1"once; If you want to enter the symbol "@", you need to press the "#" key first, and then press the number key "2" twice.