Two failures mar the premiere of the iPhone 18 Pro: lines on the screen and a camera sensitive to magnets

Let's take a look at it calmly, because a hardware failure is not the same as a simple technical curiosity. The iPhone 18 Pro has been on the market since September 18, 2026so we're talking about a handful of days of actual use. One of the problems affects something as basic as the screen. The other hits directly at the great photographic novelty of this generation: the Fusion camera from 48 megapixels with physical variable opening. Neither case is confirmed as a widespread failure, but both deserve our attention.

Green and pink vertical lines: the first scare on the OLED screen

The first problem is easy to identify with the naked eye, and you don't need to be an expert to see it. Various owners of iPhone 18 Pro and Pro Max They have shared videos and images with a vertical line crossing the screen. In one case it is a vertical pink line; in another, a thick green line appears on the side of the panel. On Reddit there are also users who report uniformity defects in their newly purchased units, although without forming such a clear line.

The most disturbing thing is that, in several cases, neither restarting the phone nor fully restoring it eliminates the defect. And here's the key: when a failure survives a complete system format, everything points to a physical problem with the panel and not a software error. One of the first buyers who spotted the line ended up returning his unit; Apple deemed it defective and the replacement iPhone arrived without the problem. However, for now Apple It has not publicly acknowledged any widespread failure nor has it opened a repair program for these cases.

The camera with physical variable aperture and its magnetic Achilles heel

The other surprise comes from the side of photography, and it is one of the most talked about bets of this generation. The iPhone 18 Pro debuts a Fusion main camera 48 megapixels with physical variable aperture, not simulated by software: inside the module there is a real mechanism that opens and closes the diaphragm to offer four values, ƒ/1.48, ƒ/1.8, ƒ/2.8 and ƒ/4.0. The problem is that this new mechanical part is also, by definition, a point of failure that did not exist before.

The dismantling of iFixit has shown the mechanism inside: six tiny, extremely thin sheets are superimposed to regulate the diameter through which light enters, and their movement is controlled by electromagnetism. During the tests it was proven that an external magnet can physically alter the position of these sheets; In fact, a magnet can be used to move them when the mechanism gets stuck. In other words: the aperture responds to sufficiently intense external magnetic fields, and there comes into play an element that all recent iPhones have as standard, MagSafe.

MagSafe, magnetic accessories and what to do if you notice a failure

This does not mean that the system itself MagSafe of the iPhone 18 Pro is going to damage the camera, be careful. Apple has designed the alignment magnets and the entire MagSafe/Qi2 assembly to coexist with the rest of the phone, and in fact officially sells cases and chargers designed for that use. The manufacturer has been warning for years that certain third-party magnetic accessories can interfere with the iPhone cameras, so it is worth keeping this in mind if you use unofficial stands, cases or chargers.

Please note that using an accessory from another brand does not automatically void the warranty. In Spain, in addition to Apple's commercial guarantee, every buyer has three years legal guarantee against lack of conformity, with a particularly favorable presumption during the first two years. So if your iPhone 18 Pro shows a permanent line on the screen or you notice something strange in the behavior of the camera aperture, the most sensible thing is to go directly to the Apple Store or to the point of sale where you bought it.