iPhone so slow and laggy after the update of IOS 14.5.1

I noticed my iphone so slow and laggy since updated to IOS 14.5.1 according to their recommend.



  1. all apps are slow and laggy
  2. Internet is so slow (now 6.23 Mbps download vs before over 200 Mbps.


does anyone have the same problem?



iPhone 7, iOS 14

Posted on May 4, 2021 6:18 AM

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Question marked as Top-ranking reply

Posted on May 13, 2021 11:49 AM

To any ll who have posted recently - how much time has passed since you updated to 14.5.1 ??  As Dogcow-Moof posted - most problems resolved themselves after 24 hours +.  I initially had really slow (slaggy) system when I updated to ios 14.5.1 but after 24 hours it improved and now it works fine (iphone (7) and ipad (2020). 

102 replies

May 17, 2021 7:55 PM in response to ruffyoung

I couldn't imagine why this temporary fix works for now. They also stopped signing previous IOS which we cannot do any downgrade process as for now.


I bought iphone12pm just to play PUBG MOBILE. I noticed a frame drop whenever the circle almost finish with 30/40 players left which never happened in previous update. I always record while playing the game, but as for latest update the fps goes drop super crazy like middle range phones whenever i tried to record while ingame!

May 6, 2021 4:49 AM in response to mario49

HI


Why are you restarting the iPhone?

  • As I noticed my phone so slow and laggy, and internet sluggish right after installed IOS 14.5.1, my first troubleshoot was forcing to restart my iphone. but it didn't work. so I forced to restart multiple times if my phone run normal condition.
  • for your reference, my phone (installed IOS 14.5) was working very fine before IOS 14.5.1.


Do you have multiple email accounts syncing to the iPhone?

  • I only use gmail connected.


Does this happen when the iPhone is fully charged?

  • yes fully charged. 100%





May 7, 2021 7:22 AM in response to Dogcow-Moof

Hi guys,


In March last year, I updated my first iphone 7 to IOS13.4.?? (not exactly remember now), then what happened was my phone passed away. the phone couldn't be restarted due to "The iPhone “iPhone” could not be updated. An unknown error occurred (9)." I talked to Apple Customer service about the people for an hour. nothing resolved at all. what She recommended me wait until battery ran out. then try it again.


Visited apple store to get support. unfortunately they could do nothing due to unknown hardware or memory failure. they didn't seem looked an engineer. their knowledge was no better than community users.


In end, I had to buy the second iphone 7. now I have this issue after IOS 14.5.1 installed.


I feel so negative that apple can do anything on this even if you call them.






May 11, 2021 7:03 PM in response to ruffyoung

I’m experiencing slow and latency with the apps as well. Most notably is the notes app. When I type any notes the text is far behind from when I’m typing. I can stop typing and the text will catch up. I have an iPhone 11, 256 gb, it is a new phone so it still has a bulk of its memory. As a new phone I expect it to be more speedy. I’m disappointed in its performance.

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iPhone so slow and laggy after the update of IOS 14.5.1

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