the age, Updates to iOS is a double edged sword, some times make older iphones slower.
You will get rid of this problem by using these wonderful tricks, just follow these instructions to give your phone a new life.
Turn your phone off and on again :
Turning your phone off and on again may boost performance, it is easy and quick.
Reduce transparency :
Appearance is very important for most of us but when it comes to performance, its better to reduce transparency to boost performance and decrease load.
You can reduce transparency by: Go to Settings > General > Accessibility > Increase Contrast and toggle Reduce Transparency to On.
You should also think about going to Settings > General > Accessibility and toggling on Reduce Motion.
Uninstall unused apps:
Apps uses resources and take up space by updating and running in the background.
Just go to your apps manager and uninstall all apps you don’t use regurarly in addition to games.
Turn Siri features off:
Siri suggests things automatically when you search in iOS and up, you should turn it off to prevent your phone delay and boost performance.
You can turn Siri off as follow : Settings > General > Spotlight Suggestions > Siri Suggestions.Another feature that could be causing a performance hit is “Hey Siri.” If you have an iPhone 6S or 6S Plus, you can say “Hey Siri” at any time to bring Siri to life, and it works on some older iPhones when they’re plugged in and charging. If you want to turn it off, you’ll find it under Settings > General > Siri.
Turn off automatic downloads:
Just take a look in Settings>App and iTunes Stores, you will find a section called Automatic downloads.
If your iPhone is the only device associated with your Apple ID, then you might want this on, but if it isn’t, then you could be automatically downloading new app and content purchases you made on another device that you really don’t want on your iPhone. If you are going to use automatic downloads, we’d suggest turning off Use Cellular Data in Settings > App and iTunes Stores.