iPhone 7 lagging when unlocking

Just adding my voice to the thread, had this infuriating issue on iPhone 7 since iOS 14 launched.

As someone earlier in the thread pointed out, it does seem (at least in my case) to be related to pushing the button to wake up the phone. This appears to not wake up the CPU correctly leading to a period of intense lag.

Enabling "Wake on Raise" and then raising the phone to wake it, before unlocking the phone via Touch ID works perfectly. It's important to note that pushing the button to wake still causes lag. You must raise the phone to wake it.

An awful workaround, but since Apple doesn't seem to care about the issue, it will have to do.

I can confirm that enabling sound recognition is indeed a workaround for the issue, but only if at least one sound is selected.

So far, I found 3 ways that helps the lagging issue:

1. Press power button first, then unlock with Touch ID.
2. Use raise to wake, then unlock with Touch ID.
3. Turn on sound recognition with at least one sound selected.

However, turning on sound recognition prevents the phone going into deep sleep mode (as someone mentioned previously). This might decrease battery life, which could be more noticable during the night (I have not tested it yet). Another drawback with this solution is that the 'Hey, Siri' function is not available while sound recognition feature is on.

@drag_og Yup, it's fixed. I tested in silent mode as well, and it's 100% fixed. I tried locking and unlocking around 50 times, and didn't encounter the lag even once. Additionally, another improvement in 14.6 is that my battery only drained 1% overnight. I'm not sure if this is because the lag was fixed or another improvement, but great to see regardless. I'm so glad my phone's usable again.

I can confirm the issue is solved totally with ios 14.5.1 update. Tested hundreds of times for the last 24hrs with “Today view” and silent mode is on as well, and alot of apps running in the background too. Zero lag! Every thing is Ok now.

Thank you very much, happy for being a part of this discussion <3.

Here is the solution step by step guys:

1: JB your iphone

2: setup LastLook tweak 

3: problems will be gone

I think the problem occurs in A1778 models. Source of the problem is the bugs when phone trying to go into deep sleep mode. But this problem occurs when phone immediately try to go into deep sleep mode after lock your iphone. Thats why when you open click sound at the lock, there is no problem for 10 seconds. Or when you are charging there is no problem. Or when you open flashlight there is no problem.What we do with this tweak is; preventing the phone to go into deep sleep mode why we locking it. Instead of go into deep sleep mode while locking, phone is waiting 5-6 seconds to go into deep sleep mode with this tweak.Problem is %100 solved. I found and using this solution for 2 week. There is no problem after all. Also there arent any problem with performance, battery etc.

I tried to explain to you simply. I used many programs to find this log. I cant explain more because this JB thing has made this comment been removed :) I hope you can manage it.

So dear apple care family, this is a %100 software problem. We expect to find a correct fix at the next ios updates. I can work for you because I’m an software engineer. Waiting for your proposes. Stay healthy.

After observing my iphone 7 a thousand times i can say that deep sleep is the culprit. Whenever i wake and unlock my iphone suddendly by touch id, it lags severly.

But if i pick it up and wait a sec for raise to wake, it unlocks completely fine without any lags…

And Apple engineers are so dumb to fix this small issue related to deep sleep… Really disappointed…

Today I turned off Rest Finger To Open in Accessibility > Home Button and I can say it’s gone for 99% .

iOS 14.5.1 finally solved the issue. Previously I could reproduce the lag 6 times out of 10, now I tried it 40-50 times with no lagging at all. Everyone should update to 14.5.1.

Hello, IvanTan55.

Thanks for posting in Apple Support Communities. We're happy to help troubleshoot the performance issues you're experiencing after the latest iOS update.

Does your iPhone have enough storage space available? How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

Do you have any pending iOS 14 updates available? If so, we recommend installing it for the latest updates and fixes:

Update your iPhone, iPad, or iPod touch - Apple Support

About iOS 14 Updates - Apple Support

What is your battery health and performance? To check, go to Settings > Battery > Battery Health.

iPhone Battery and Performance - Apple Support

iPhone Battery Replacement - Official Apple Support

Let us know what you find! Take care.

IOS 14.3 iPhone 7 128GB eith 95GB free space. Everything was okay until update to IOS14. Only where I can have less lagging or no lags after unlock is when I disable touch Id and passcode, then I'm noticing almost non lagging after unlock and working fine. But when I activate touch id i get that 5 seconds lagging after unlock with touch id. Tried erace all finger scans and put new finger scans, tried reset, turning on and off phone and nothing helped. Unlock with tpuch id and click on app and I get white screen then I get messages and then I dont have keyboard and then finally comes, or somethines I unlock and I'm in app already and I'm start typing and nothing its like frozen and after 3-4 seconds unfreeze and what I type keynoard typecitcself in seconds and it works after that. Or with songs its lagging in apple music like Im using iphone 3g. This start to be very very frustrating to that point that I'm thnking of sell iphone, apple watch and cancel all subscription and go back to android.

I turned on „reduce motion“ and now the iPhone has become much faster during the lag. It does a short and light vibration though when the lag ends which I noticed already shortly after upgrading to iOS 14 even when it didn’t lag. This vibration might have something to do with the reason of the lag.

Also it looks like „reduce motion“ makes the phone generally faster as well.

The workaround works:

1) raise your phone with raise to wake on, so that the screen goes on

2) unlock the phone with Touch ID

I have been trying this since yesterday and got no lag. It is basically like using Face ID, since you raise your phone showing towards your face and then once the screen is on you unlock it. If you unlock it directly when the screen is off, it might lag.

Maybe it has something to do with the optimisation of sleep Mode: it somehow hasn’t been optimised for Touch ID but only for Face ID?

bro, I just recorded the lag and it has happened to me every time I try to unlock it, the error happens when you unlock the iphone with the touch id and pressing the button where it is located, I have removed the fingerprint for a moment and try to unlock it with pin code and this does not occur so the error is the TOUCH ID

IPhone 7 256GB. It seems that in 14.5.1 the bug has gone away. Testing it for 2nd day, everything is ok. Silent mode, w/without charging, w/without “raise to wake”. I guess next time I wouldn’t be upgrade firmware at least for a few months to avoid bugs like that)

Thanks to everyone in this thread. Good luck!

Update : I replaced the dynamic background with a static one and the situation has improved a lot.

so I think it is a iOS bug on iPhone 7 that must be fixed.