iPhone slowness can be resolved by following these steps. iPhone slowness can be caused by various reasons. Most of the time it is an easy thing to speed up an iPhone.

1. HOW TO FIX
SLOW IPHONE
www.fromdev.com
RESTART YOUR IPHONE
Simplest Thing To Do
Just power cycle may do wonders on
iPhone and it may become faster really
quick.
UNINSTAL APPS
Clean up apps that you don't use
This will save you space and unwanted
processing done by some apps in
background.
REMOVE MEDIA
Backup your photos and videos on
cloud
Remove from device and use apps like
Google Photos that can help you auto
clean and make space on device once
photos are already in backup.
KILL BACKGROUND APPS
Many apps run in background
You do not need all of them running all
the time
UPDATE IOS
May work sometimes
Minor iOS upgrades usually have a lot of
bug fixes that may improve your overall
experience and sometimes performance
too.
MORE AT
HTTPS://WWW.FROMDEV.COM/2018/12/HOW-TO-FIX-
SLOW-IPHONE.HTML