The iPhone 17 Pro Max uses 480Hz PWM for brightness control. For most people, irrelevant. For some, it causes real problems.

What's happening:

PWM controls brightness by rapidly turning pixels on and off. At lower brightness, more time in "off" state. Your eyes might not consciously see flicker, but some bodies react anyway.

The symptoms:

Eye strain. Headaches. Fatigue after extended use. Usually worse at low brightness, like in bed at night.

Am I affected?

If you've had issues with other OLED phones or certain monitors, you might be sensitive. If you've never noticed screen problems, probably fine.

How iPhone compares:

Samsung S25 Ultra: same 480Hz. Honor Magic 7 Pro: 3840Hz. Higher frequency = fewer issues for sensitive people.

What to try:

Keep brightness higher. PWM less noticeable at higher levels. Enable True Tone. Use "Reduce White Point" in accessibility. Take breaks with the 20-20-20 rule.

Before buying:

If you suspect PWM sensitivity, test the phone in an Apple Store at low brightness for 15-20 minutes.

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Short answer: Yes, any USB-C charger works. But they don't all charge at the same speed.

What charges fastest:

For maximum speed, you want a 40W+ USB-C Power Delivery charger. Apple's 40W Dynamic Power Adapter is designed for it. Third-party chargers from Anker, Belkin, and similar brands work equally well.

With the right charger: 50% in about 20 minutes. Full charge in around 85-90 minutes.

What still works:

Your old 20W Apple charger? Works, just slower. That 5W charger? Works too, but slow.

MacBook chargers work great. 30W to 140W. The phone takes what it needs.

Cable matters:

Use Apple's included cable or a quality PD 3.2 cable. Cheap cables may limit speed.

Wireless charging:

MagSafe and Qi2: 25W. Standard Qi: 7.5W.

What doesn't work as advertised:

Samsung Super Fast Charging, OnePlus SUPERVOOC, and other proprietary standards fall back to standard PD speeds. iPhone only speaks USB-C Power Delivery.

Safety:

Can't overcharge with a too-powerful charger. The iPhone regulates its own intake.

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Apple Intelligence is Apple's AI suite, and the iPhone 17 Pro Max runs all of it natively.

Writing help everywhere:

Select text in any app. Rewrite it differently. Change tone to professional or casual. Proofread for errors. Summarize long passages. Works in Mail, Messages, Notes, and most apps.

Siri actually got smarter:

New Siri understands conversational language and context. Ask follow-up questions. It sees what's on screen and acts on it. Still not perfect, but noticeably better.

Notifications that don't overwhelm:

Get summaries instead of 47 separate alerts. The phone highlights what's important. Mail pushes urgent messages to the top.

The fun stuff:

Image Playground generates images from text descriptions. Choose animation, illustration, or sketch style.

Genmoji creates custom emoji from descriptions.

Clean Up in Photos removes unwanted objects. AI fills the background.

Privacy:

Everything runs on-device when possible. Private Cloud Compute with end-to-end encryption for heavier tasks. Your data doesn't train Apple's models.

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