There is a signature conflict when installing mobile qq on vivo mobile phone, but the old version of qq has been uninstalled and no residue is found. How can I ask God?

If the prompt "signature conflict, inconsistent with the signature of the old version" appears when installing the software, it may be that you did not completely uninstall the software. I suggest you restart your phone after cleaning up the garbage through I housekeeper scanning. If the program has a third-party application on your mobile phone, you can find the software in Settings-General/More Settings-Applications-Factory Application Management, and then click Install to try it out.