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Apple has officially apologized for hiding the fact that it was secretly slowing down the iPhone old models to prevent them from shutting down abruptly because of the low battery, and offered to replace the batteries of those phones (iPhone 6 and beyond) for $ 29. Followed are seven indicators of whether Apple has been slowing down your phone, and if it should get a new battery.

- Opening apps take longer: force your app to close, then watch whether it takes longer than usual when you restart it.

- Slower frame rate while scrolling: Do you notice that your phone screen lags when you browse web pages and switch between the phone's home screens?

- Lower back light: Do you notice that your phone's screen is no longer as bright as the previous one, even when the lighting is maximized?

- Low sound level up to 3dB: Do you notice that the sound from your phone speakers is no longer as strong as before?

- Gradual drop in tire rate in some applications: Try it specifically with 3D games requiring high processing power and speed of performance such as racing games.

- In some cases the camera flash light is revoked: Can you use the camera flash as before?

- Refresh (refresh) applications in the background may require reloading at boot: Applications that normally pull new data, even when you do not use it - like Facebook or Twitter - have you stopped doing it all of a sudden?

Of course, there may be other reasons for some of the performance problems listed above, so first make sure you have accelerated your old phone's performance to ensure that the reason is not something else.

You can speed up your iPhone's performance by freeing more space on your device by deleting unneeded applications, transferring video files and images to your computer or saving them in the Eclipse cloud, updating applications, turning off auto-update, minimizing motion and transparency in your phone,

You should also know that the following are not related to the problem of slowing down the performance of your phone according to Apple: the quality of phone calls and Internet connection speed, the quality of images and video captured by the phone, the performance of the Global Positioning System (GPS), and the performance of phone sensors such as motion sensor, , And Apple TV service. So if you find that any of these things have been undone, you may have another problem with your phone.