iPhone 7 lagging when unlocking

Hello, IvanTan55.

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Yeah, I did

EVERYONE who has this bug on their iPhone 7 after updating from iOS13 to iOS14 - do bug-report to Apple support here:

https://www.apple.com/feedback/iphone.html

and here:

https://feedbackassistant.apple.com/

We need to let them know about this bug and they will fix it!

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.

Good evening! The same problem is observed on ios 14.2. When unlocking iphone 7 (32 Gb), the animation lags for 3 seconds, and then everything is ok. The bug is repeated 1 time out of 5. But when it is repeated it is very annoying. Free memory is more than half, battery status is 97%. A full factory reset and restore from a backup didn't help.

I have been facing this problem since ios 13. I though it will fixed in ios 14. And yes, I agree, waking the device for 2 seconds & then unlocking doesn’t cause the lag.

Also, low battery health & low storage doesn’t matter. It still lags.

I have iPhone 7 (32 gb)

This has been my experience for the last couple of months. I had a new battery installed in June, so I don't think it's an Apple throttling issue--it's pretty old though, forced obsolescence?

EDIT: i have 65 GB free storage, I just switched from dynamic to still backgrounds. My current working theory is Apple wants me to upgrade.

Since switching from dynamic to still backgrounds yesterday, I haven't had the lag while unlocking. Perhaps when the phone wakes, animating the background and loading the unlock process is too much to handle.

It's a shame apple didn't gave any official response on this issue. It is clear that this issue affects a lot (if not all) iPhone 7 users and makes usage of phone is highly unpleasant. Is this continuation of apple strategy to degrade performance of previous generation phones to force users to upgrade?

Hey, I’m using an iPhone 7 Plus, have 92% battery health and over 10gb of free storage, and even I’m facing the same issue after updating to iOS 14. Thought that Apple would fix it with 14.3, but was left disappointed. A temporary fix would be to go slow on the phone cus it seems like an issue when you’re trying to do things quickly. It’s certainly not cus the A10 can’t handle iOS 14, it’s some sort of performance bug.

Well, is good to see that this problem is a really big problem for a lot of iPhone 7 users and not only a two or three.

I updated to iOS beta 14.4 and the problem looks to be a little less annoying. I will try with leaving the Low Power on.

I already sent a feedback with the Feedback app.

I also observe the same issue on my iPhone 7 128GB. I have more than half of the storage free and just got the battery replaced last week. I observe this since iOS 14, currently on iOS 14.3. I observed that the issue does not happen when the phone is on charge. I also observed that the issue only happens after unlocking the phone using Home Button and Touch ID. The issue does not happen when I first press the power button, then touch the Home Button to unlock with Touch ID. The issue also never happens if Touch ID is turned off.