Mobile phone 9 100gt The problem that the mobile phone network is unavailable today. Can't make a phone call, can't receive a text message, can't restart. How should I solve it?

According to your description, I suggest you try the following steps:

1) It is suggested to change the network mode: Settings-Wireless and Network-Mobile Network-Network Mode-Network operator re-select the search network.

2) It is recommended to take out the SIM card, wipe the SIM chip with an eraser, and then re-insert the SIM card into the mobile phone.

3) It is recommended to replace other SIM cards as much as possible.

4) If it still exists, it is recommended that you restore the factory settings of the machine, as follows: Setup-Reset-Restore the factory settings (however, since restoring the factory settings of this machine will lose all data in the mobile phone, it is recommended that you back up important data such as phone book, video and pictures in advance).

5) At present, i9 100g can be upgraded to version 4. 1.2, so I suggest you try to upgrade the firmware. (Settings-About Equipment-System Update)

If there are still problems through the above methods, please bring the purchase invoice, maintenance card and machine to Samsung service center, and the engineer will check and deal with the machine. Please click the following link to find out the specific location of Samsung Service Center: /servicelocation.

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