The mobile phone can't send short messages, and it's useless to change the center number. The address book is always updated. What should I do? Only bought it for half a year.

Sorry for the inconvenience, but please forgive me! You use it after upgrading the mobile phone software version to the latest version. There are two ways for self-service upgrade of mobile phones:

① You can upgrade online through wifi: Enter Settings-> More settings-> System upgrade-> Check the update immediately-download the upgrade package according to the prompt, click Check and Install, and the phone will restart, automatically entering the upgrade mode.

② Upgrade with vivo assistant: Download address of vivo assistant:/After downloading and installing the program on the computer, open the vivo assistant and connect the mobile phone to the computer. After the tool detects the mobile phone, it will access the server. When it detects that there is new software on the server, it will display the word "new" on the "mobile phone upgrade" button. Click this button and follow the prompts to upgrade.

If you have any questions, please feel free to consult us. Thank you very much for your support of our vivo. I wish you a happy life!