How to turn off the sound when Hafen sends a text message?

The old man-machine usually refers to a mobile phone product suitable for middle-aged and elderly people. This product has a single function. The old man-machine is widely used by the elderly, which has an important impact on the popularization of telecom terminals in the country, allowing the elderly to fully experience modern life and have daily use functions such as telephone and SMS. At the same time, the buttons and display fonts of the old man-machine are generally large, easy to operate, and usually have humanized functions such as one-button dialing, which is favored by middle-aged and old users.

Features:

Super key

You can see clearly without reading glasses. Each key has reached more than 1.5 square centimeters. Through the field experiment of 100 elderly people, they can see clearly without reading glasses.

Oversize font

It is more than 4 times larger than ordinary mobile phone fonts. Super font, black keyboard, white font, more than 4 times larger than ordinary mobile phone font. ? Screen color contrast, there are no bigger words in the phone.

Super loud volume

Don't worry about not hearing the bell on the phone. Super loud, there is a prompt tone every time you press the key. You don't have to worry about not hearing the bell when you make a phone call with super loud.