Delay in notifications iPhone 16 Pro iOS 18.3

Question

Created 3w

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Hi, I’m having issues with push notifications on my phone across multiple apps. When someone sends me a message, I only receive the notification 10 to 15 minutes later. For example, on WhatsApp, people say that my chat only shows one checkmark when they send me a message.

I don’t know what else to do. I’ve already contacted Apple Support, visited an Apple-affiliated physical store, and followed all the recommended procedures. This is my first time using an iPhone—I bought it for professional use, but it’s practically useless if I don’t receive notifications instantly.

They even told me that if I send it in for warranty service, there’s a 90% chance they won’t detect the issue, and the iPhone will come back with the same problem.

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Answer 1

jcamilocf OP

2w

I’ve been experiencing the exact same issue since I purchased my iPhone 16 Pro on launch day in September, and it has not been fixed despite all the iOS updates I’ve installed. I have an open case with Apple Support, but every time I call for an update, a new supervisor takes over and tells me the same thing: that this is a software issue.

We’ve tried everything—factory resets (twice), network and general settings resets multiple times, collecting logs, sending screenshots and videos, verifying all app settings, making sure DND isn’t interfering, and countless other troubleshooting steps. Nothing has worked.

I’ve asked for a replacement, but they refuse, claiming it’s not a hardware issue. However, given how many people are reporting this, I can’t help but feel that this is an inherent hardware flaw in some iPhone 16 models. The fact that Apple keeps pushing updates without fixing it is frustrating.

I just wanted to share my experience in case a developer sees this and can actually help us.

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