Mobile phones can make calls and send text messages, but they can't surf the internet without receiving text messages.

If Samsung's mobile phone can't access the Internet through mobile data, I suggest you try:

1. Slide down the curtain at the top of the screen to open the mobile data. SIM card needs to open internet service.

2. If you still can't access the Internet after the above operations, it is recommended to reset the parameters of mobile Internet access: Settings-Mobile Network-Access Point Name-More-Reset to the default settings.

3. Replace other SIM cards or try other time periods to eliminate network problems.

4. Upgrade your mobile phone to the latest version.

5. If it doesn't work, please back up the data in the mobile phone and let the machine restore the factory settings.

If the problem still exists, please take the purchase invoice, maintenance card and machine to Samsung Service Center for inspection.

If your mobile phone can't send and receive short messages, we suggest that you:

1. Check whether the phone bill is sufficient.

2. Check whether the information center number is entered correctly: information-menu key-settings-SMS settings-information center-set the information center number (please contact the local network operator for the information center number, and the telecom card is not set with the information center number).

Please have a look at whether to set up a blacklist. Settings-Click Call/Message Blocking-Click Message Blocking to select the number and phrase to block registration-Click Message Blocking List to delete the number inside.

4. Whether to set the upper limit of SMS reception, it is recommended to turn it off.

5. If you install third-party communication software, you may receive a short message. It is recommended to uninstall it.

6. Try another SIM card, shut down and restart observation.

7. Back up important data and restore factory settings. Operation method: Settings-Reset/Privacy-Restore factory settings.

If the problem still exists, I suggest you take the purchase invoice and warranty card and send your mobile phone to the nearest Samsung service center for testing.