My mobile phone model is GT-I8552, which was fine before. Suddenly, I can't call, send text messages or surf the Internet. What should I do?

According to your description, you can try the following methods:

1. Restart the machine.

2. On the standby screen, click Applications-Settings-More Networks-Mobile Networks-Network Mode-Select GSM Only.

3. Test whether this is the case in different geographical locations, and initially eliminate the problem of network signal coverage.

4. If conditions permit, replace the SIM card for testing.

5. Check whether the mobile phone is equipped with software such as security guards or incoming calls, uninstall it and try again.

6. (Backup data: phone book, SMS, multimedia, etc. ), I suggest you restore the factory settings.

After restoring the factory settings, it still cannot be solved. It is recommended to send the mobile phone to the nearest Samsung service center for testing and further processing. Please click on.

For the simulation operation guide of I8552, please click the following link. Teach you to master practical skills step by step and use your equipment better. _ simulator _ I 8552 _ news alerts _ 1403 10

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