Can QQ cancel the phone and throw it to the police to restore the chat record?

Yes, you can. This is the power entrusted by the state to the public security organs. In order to find the evidence of the criminal, he can ask the telecom operator to type all the originals. However, in grass-roots public security organs, technical equipment is limited, and some contents may not be restored. Especially Apple phones, there will be some obstacles. For other mobile phones, it is not a problem to recover call records or text messages. The police should be more professional in recovering mobile phone data, because the work of the police involves solving cases and obtaining evidence, so there will be more professional network experts and software to recover mobile phone data in this link.