Answer:If the language has changed, go into the settings to check the language and input method, that is, Setting -->Language&input -->language -->Simplified Chinese.
Answer:Finally, don't forget to back up important data. Disconnect from the network before asking for professional help to prevent information loss.I hope this information will help you
Answer:It should be the hardware fault of the mobile phone. It is recommended that the building owner contact the manufacturer's after-sales service for inspection and maintenance.