Standby mode on iPhone 15 pro max does not stay on

A test I made:

• If I put my iPhone on the magsafe but the power supply cable plugged into the magsafe charger, it will eventually turn off (randomly)
• If I put my iPhone on the magsafe BUT plug the phone directly into the charger cable (use the magsafe only to hold the phone horizontally), it will stay on all night no problem...

Tried 3 different magsafe charger, changed my Apple factory cable to another and also the power supply but test it and see if you have the same results as me.

Hopefully Apple will fix this because as many, if I have to touch my screen after 2-3-5 hours, it wakes me up...

Check Settings -> StandBy -> Display. One option turns it off after 20 seconds, one if the room seems "dark", and one never.

NorthVermont Said:

"Standby mode on iPhone 15 pro max does not stay on"

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Standby Mode Features Affected by iOS17:

Update your iPhone to the latest iOS update: iOS 17.0.3. There are lots of features of Standby Mode affected by this update.

See here: About iOS 17 Updates - Apple Support

How to Update and iPhone 15 Pro Mac:

See my User Tips:

• Update your iPhone Using a Computer - User Tip
• Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip

NorthVermont Said:

"Standby mode on iPhone 15 pro max does not stay on: Thanks but I’m on 17.03 and the problem persists.”

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You are welcome.

Report this to Apple

Do your Part: Provide Apple with feedback on this, letting them know about this issue.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this is is issue with this particular model. Include the URL of this thread
4. Proceed from there as necessary

NorthVermont Said:

“[…]I've been trying to figure out what is going on with the Standby Mode. In my situation it seems to stay on for at least several hours but then goes off at 10:43 Pm. It then comes back on, and stays on starting at 8:00 am.[…]”

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Is Screen Time Enabled?:

If Screen Time is set up and enabled, then you may have disallowed access to this phone during this time, other including other abilities to use this.

1. Go Here: Use Screen Time on your iPhone, iPad, or iPod touch - Apple Support
2. As it Reads: "To change or turn off the passcode on your child's device, go to Settings > Screen Time and tap your child's name. Then tap Change Screen Time Passcode or Turn Off Screen Time Passcode, and authenticate the change with Face ID, Touch ID, or your device passcode."

NorthVermont Said:

“Thanks but screen time is not enabled on my phone or other devices.”

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Edit Standby Mode:

Hold your finger down for a few on the clock face while in Standby Mode. Tap the Clock widget when all shows. See if you can then edit the timezones. Try various timezones, seeing if you can get to the correct time that will allow you to get in, as if the time has already expired.

I'm also seeing this issue. I bought a mag-safe stand so I could use my phone as a bedside clock at night. It works fine for a few hours, but the display turns off eventually. If I move, then it turns back on, but will once again turn off after another 3 hours or so. I have Night Mode enabled. I'm running IOS 17.2.1 on a brand new iPhone 15 Pro.

I've tried using both Automatic and Always On standby display settings. Even in Always On mode, it will turn off after a few hours.

Is this just how it's supposed to work? If so, I don't understand the rationale for it. To me, it looks like a bug.

17.03 does not fix the problem. It's annoying because it's a feature I find useful.

It seems to only be an issue at night in a dark room using the red night mode. No matter what the setting for night mode is it still goes to red and switches off after 15 seconds.

NorthVermont Said:

"Standby mode on iPhone 15 pro max does not stay on: Thanks for the help have reported to Apple”

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You are welcome.

Thanks for doing your part. It will help many for certain.

Excellent Job Troubleshooting!

"Oh, it gets worse! There’s no option for 17.0.3 when submitting a report!! I went ahead and submitted choosing …2, but made a big note that I am on 17.0.3! Quite frustrating! R."

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Great idea to make the note of it! Providing the URL of this thread would show Apple this too.

NorthVermont Said:

“Thanks but screen time is not enabled on my phone or other devices.: Sorry do not understand what you are suggesting”

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Edit Standby Mode:

See if this one month old post’s wording works for you: How can I change Standby mode's time zone after iOS 17 update? - Apple Community

I agree. Nightstand mode is totally useless as a clock if you have to wake up and move your hand in front of the screen for it to turn on. I need to be able to just open my eyes to see it otherwise getting up to wave my hand wakes me up and so what is the point. This screen needs to stay on otherwise ......totally useless.

I agree. Nightstand mode is totally useless as a clock if you have to wake up and move your hand in front of the screen for it to turn on. I need to be able to just open my eyes to see it otherwise getting up to wave my hand wakes me up and so what is the point. This screen needs to stay on otherwise ......totally useless.

Same here, I only upgraded to a 15 pro max for this feature. It stays on for a few hours then switches off. I have the settings correct, so frustrating as I want to open my eyes and see the time. I am going to the Apple Store today to exchange the phone to a 15 plus and buy a clock.