Qq says you can't send videos.

Upgrade. Think about why you want to upgrade.

The purpose of upgrading the mobile phone system is to adapt to the new hardware and cpu, not to upgrade the running speed of the system. If the hardware of the mobile phone is not upgraded, it will still use the old mobile phone, but it will cause the system to be bigger, occupy cpu and slow down.

You know: upgrading your phone will only slow it down. This is the common sense of all mobile phones.

Moreover, after the upgrade, some software will be incompatible, and the new version must be reinstalled to be reused, but this will cause the loss of a lot of information in the past.

Solve:

Delete qq, download the new version of qq from qq website again and reinstall it.

Remember: only the system when you first got the Apple phone is the fastest and most sophisticated system that best matches the existing mobile phone hardware. . After the mobile phone system is upgraded, the memory will run many times that the current mobile phone hardware does not need, occupying cpu and memory, so it will be slower than the original system, but it will not be felt when it is used.