Say * * * to save this software first. If you don't understand decompilation, I suggest using apk editor. Use this software to find the installation package you want to install. If you hold it down, a menu will appear. There is a function called * * * save. After clicking, a new installation package will be generated. Just install it directly. It depends on the landlord's intention to install qq. At present, it is found that QQ software is different from other software. Because Tencent has restrictions, it can be understood that QQ has software protection. After the signature is modified, it cannot be installed or used. YY has not been tested. QQ suggests installing different types, such as 20 1 1QQ, qqHD, qq for pad, 20 12 or 20 13qq. These four can be installed at the same time. You can ask if you don't understand.