Slow performance after upgrade

There may be several reasons due to which an iPhone may behave as described by you. Some of them could be...

1. Storage could be an issue --> How to check the storage on your iPhone, iPad, and iPod touch
2. Battery health could also reduce performance --> iPhone Battery and Performance - Apple Support
3. Incorrect handling of the iPhone --> Important handling information for iPhone - Apple Support
4. Dust ingress into the iPhone - Cleaning your iPhone - Apple Support
5. Water / Liquid entry into the iPhone---> Important safety information for iPhone - Apple Support
6. Overheating due to exposure to the temperature beyond -20º and 45º C (-4º to 113º F). especially in the car because temperatures in parked cars can exceed this range -- Keeping iPhone, iPad, and iPod touch within acceptable ...
7. Service of an iPhone by an un-authorised service personnel / agency / store
8. Modification / Alteration of an iPhone by a third party vendor
9. iPhone is Jail Broken

claudiafrompretoria Said:

"Slow performance after upgrade Hi have an iphone X, and the phone did an automatic update to IOS 13.7. ever since then EVERYTHING has been super slow. Music freezes during a song, apps take long to open, just in general, everything has become slow. what can i do you solve this issue, as it is very frustrating"

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Two Important Thoughts:

• Always Backup Prior to an Update:

Start by making a backup of your iPhone. Using iCloud or your computer to do so. That way you can have something to restore you iPhone from, should anything go wrong with the update installation. So, take this as a learning experience, always knowing the back up the device - whatever the device is. If you have a backup, then restore from it.

• Report this as a Bug to Apple:

Apple won't get back to you directly on this, but the more reports they receive of this, the more they will know what is going on and what needs to be fixed in updates to come.

To Report It:

1. Go To: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Proceed from there as necessary.

.... or just conveniently with new iPhones coming up in a few weeks’ time?

There are some options. Please search google “return to previous ios update”. You’ll find several tips and tricks. I prefer the YouTube videos. Good luck!!