The phone was shut down abnormally and the battery was replaced. After the phone was turned on, all text messages disappeared.

Dear Samsung user:

Based on your description, we recommend you:

1. Information-Menu key-Settings-Basic settings-Delete Old information - uncheck.

2. Clear SMS data: Settings-Application Manager-All-Information-Clear Data.

3. Check the phone for virus software. Check method: Settings-Application Manager-Running-Check whether the Com.android.version process is running. If this program exists, please uninstall it and restart your phone.

4. If it doesn’t work, please back up the data in your phone (contacts, text messages, pictures, etc.), and then restore the factory settings (Settings - Reset People - Restore Factory Settings).

If the problem persists, please bring your purchase invoice, repair card and machine to the Samsung Service Center, where professional after-sales engineers will help detect it. For specific service center inquiries, please visit: .samsung.com/support/ServiceLocations.asp

It is recommended that you make an "appointment in-store" maintenance application on Samsung's official website to enjoy priority maintenance services: /pre-booking

After the appointment is successful, please bring your machine, invoice and warranty card to visit the service center you reserved on time.

For comments, suggestions, and complaints, please click: support.samsung.com.cn/survey