iPhone 6s phone app freezes after iOS 12 update

This problem has just occurred on my phone after upgrading to 12.0.1. After contacting support they talked me through a hard reset which fixed the problem. I found that just turning it off and on did not fix it.

The fix:-

1 Press both volume (+ & -) buttons and home button simultaneously and hold until phone shuts off

2 Wait 20 to 30 seconds

3 Power back on normally - you will see the Apple icon on black screen

4 When you see the log on screen - Enter your passcode

5 Fixed issue

There was no need to re-enter settings as these were all still correct in the phone

Restarting the iPhone is also one of the methods that can be used to solve this issue. All you need to do is long press the Sleep button and slide the slider to turn off the iPhone. Again long press the Sleep button to start your iPhone. If this does not help, you can also hard reset the iPhone. Here are the steps that you need to follow.

If you are using the latest iPhone XS, XS Max, XR or the 2017 iPhone X, 8, 8 Plus then:

Press the volume up and down button. Then, long press the side button till the Apple logo appears and the device restarts.

If you are using iPhone 7/7 Plus:

Long press the volume down and side button till the Apple logo appears and the device restarts.

If you are using iPhone 6s or earlier model

Long press the home button and the sleep button till the Apple logo appears and the device restarts.

I have a 6splus so all I was getting was Siri and volume changes. Had to instead press the home button and the sleep button and this hard reset and I was able to use my calendar again. Otherwise I could open calendar and it was just stuck on today. Hope that’s helps others.

Same issue here - hadn’t noticed until today but I think you’re right, app becomes unresponsive after a missed call. Phone restart is the only way to fix. Given all the other comments sounds like an iOS 12.x bug :( not good...

I have the same issue. Apple Support was helpful with the hard reset solution which, temporarily fixed the Phone App freezing problem. Unfortunately, I continue to have the problem requiring regular hard resets (at least every other day). I haven't updated to iOS 12.0.1 as I read the problem persisted there for many. Let's hope that 12.1 addresses this major issue...

Make sure that you have some sufficient free storage on your iPhone. Clean up your iPhone storage by clearing apps cache will help you with it maybe.

This has happened to me already four times with an iPhone X and iOS 12 (point nothing).

The Phone app becomes entirely unresponsive. Force quitting it in the app switcher does nothing. To be able to make phone calls (or use the app) you need to reboot the phone, exactly as OP said.

Really horrifically bad.

I also have an iPhone 6 Plus and it's been going berserk after iOS 12.0.1 Update. My iPhone is Opening Apps by itself, typing / entering letters and numbers in texts, freezes up, and generally completely frustrating the **** out of me. Is Apple aware of what's happening? Is there going to be a Solution? My iPhone has never been this messed up until now. I'm about ready to burn it in an incinerator!

I’ve had the same issues. Upgraded to iOS 12.0 and calendar started to freeze and wouldn’t sync, display calendar events, from my Mac (new Touch Bar 15” MacBook Pro) , even though connected to my Mac Upgraded to iOS 12.01. Did a phone restore and reinstalled backup. Still the same issue, calendar freezing.

Also unresponsive on apps including iTunes, cannot pause songs, it’s like the touch screen is not recognising touch commands.

Tried the hard reset suggested, i.e. holding both +/- volume buttons and home button simultaneously (more than 1min) and the phone doesn’t power off or hard reset. Any ideas please?

Same issue here with my 6S. Holding the volume buttons and home button simultaneously does not reset my phone. I have tried turning it off and on the usual way (power button plus home button) to no effect. Phone app remains unresponsive. I can make calls through Contacts, assuming I am calling a contact. Would love to hear from Apple that they are working on this giant bug, as I saw another poster having the same problem with an iPhone XS. I was thinking of upgrading but not going to if this problem persists.

I've got the same exact issue as soon as I upgraded to iOS 12 w/ my iPhone 6 plus. I have since upgraded to iPhone Xs and am having the same issue on it as well. It's driving me crazy.

This worked for me! I didn't know about the hard-reset with the volume buttons. I had just been trying to reset the phone normally. Thank you!

We'll see how long it lasts...

When I press simultaneously both( + / -) volume buttons and the home button my Siri kicks in and no matter how long I hold nothing happens. Anybody else is experiencing similar issue?

Same problem on iPhone X, updated to iOS 12.0.1

very annoying!

Only happens when I missed a call...