What is the inconsistency of signature files in mobile phone software update?
Digital signature is a verification method. Inconsistent signature files may be that the APP you downloaded really failed verification and could not be installed on your mobile phone. Another possibility is that when you install programs, most of them will be installed in the SD card. There is an android installer folder in the SD card, which may contain an installer (I forget the specific name, you can find it in it, which is different from other installers). You can delete this program.