Answer:Download the Android version of QQ into your phone's memory, confirm that the memory space is enough, and then follow the prompts to install it. It's not difficult.The 2012 version of QQ has been disabled for a long time. Let's change to the 2014 version.
Answer:Your mobile phone must have been exposed to water or damp.You can clean your phone at the warranty point for free.It will be much easier to use.