Two days ago, Apple published their new phone iPhone 7 and the new operate system IOS 10. So lots of people want desperate want upgrade to the new system. But as soon as they did that, people will found out their iPhone or Mac run slower than before. And sometimes the old devices are not even working properly. So lots of people got confused, asking why did this happen? They thought the new system should make their mobile devices better. But the fact is completely contradictory.
So there are two reasons for this. The first one is the hardware of your mobile device is outdated. Because new operate system are designed for the new device or the new hardware. So if a outdated processor running a newest system, it must be slower than before. Because the newest system is not designed for the old processor. So it must going be slower than the old system. Also sometimes, if the operate system is too new for the processor, the processor will not working properly and consuming lots of energy. For example, if you install a new engine on a old car and run it for a high speed, the car is also going to broke down in a short time.
Second reason is that people’s old device probably have some unused files stored in the phone. And these files are going to slow the phone down. Because when people download the new system for their device, it also going to download some additional files too. Also there is old systems’ unused file. So these files together can slow down the speed really much.
Also there is rumor that the phone company wants people to upgrade their newest device. So they just slow down the people’s old device and make people want buy the new device. But this is still a rumor, still unverified.
But I think the main reasons cause the old mobile device running slowly after upgrade to the new system is because the hardware issue such as processor and files issue. So these two issues are the main problem caused our mobile device running slowly.