Mine is Samsung A5. Why is there no information prompt when locking the screen? How to adjust it?

According to your description, if there is no message prompt tone when you receive the text message, I suggest you:

1. Try to reset the SMS: Info-Menu key (three dot icons in the upper right corner)-Settings-Notification-The slider in the upper right corner opens and the notification sound is set.

2. Check whether the phone is turned on in silent mode, and pull down the top curtain to turn the sound green.

3. Set the notification volume of the mobile phone (Settings-Sound-Volume-Notification, turn up the notification volume).

4. Try to replace other built-in system ringtones.

5. Please back up the data (contacts, text messages, pictures, etc. ) in your mobile phone, and then restore the factory settings (Settings-Reset-Restore Factory Settings).

If the problem still exists, please take the purchase invoice, maintenance card and machine to the Samsung service center, and the professional after-sales engineer will help you test it.

It is recommended that you apply for "booking to the store" in Samsung official website and enjoy priority maintenance service:/pre-order.

If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.