First, you should root your mobile phone, and then download a mobile version of apktool4.4, and search it online, and then decompile the software you want to save with apktool. After decompilation, a folder with the same name as the software installation package will appear. Find the AndroidManifest.xml file and open it with a text editor. You can also find package=com.xxxx,,, or other formats, mainly depending on package,, and then just modify what follows =, and all the modifications must be the same,,, and then save, delete the original backup, compile it back with apktool, and then sign it, and you're done! ! !