of course, by default, the QQ version is the latest version, and you need to manually download the old version, such as the 21 version.
the second option is to choose pea pods mobile assistant. Download pea pods Mobile Assistant on the computer, enter the 21 version of mobile QQ in the search field, and the corresponding QQAPP will pop up. Pull down to the bottom with version history, click to enter version history, select the 21 version of mobile QQ you want, click Download, and then install it directly on the mobile phone connected with the data cable.
of course, there is a third method, which is to directly enter the 21 version of mobile QQ in the browser and install it through a third-party market platform. In this case, you can quickly, directly and effectively find the target file to download and install it online, and it can run normally after installation.
in the above three cases, you can download and install mobile QQ on the computer and transplant it to the mobile phone. The method is simple and the operation is clear and easy.