6 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
iPhone 15 green/pink/white screen lines after iOS 18; Apple quoted paid display replacement
From tech-news report (ixbt.com) found via 'iPhone 15 green line on screen issue forum'. Owners reported green/pink/white lines on iPhone 15 screens after the iOS 18 update in 2024; Apple service centers quoted a paid display replacement of about $300, and India's consumer regulator opened a deeper investigation.
What to check. A documented display fault: green/pink/white lines appeared on iPhone 15 screens after the iOS 18 update, and Apple service centers quoted roughly $300 for a paid display replacement. If you see lines, record them and push for warranty coverage before paying for a panel swap.
iPhone 15 recurring overheating, freezing and screen-slide faults despite main-board and battery replacement
From Turkish owner complaint (sikayetvar.com) found via 'Apple iPhone 15 sorunları forum'. The owner reports overheating, freezing and screen-slide faults that recurred within a week even after Apple service replaced the main board and battery under warranty.
What to check. A Turkish owner reports the overheating/freezing fault returned within a week even after Apple replaced both the main board and battery under warranty. If you buy an iPhone 15 in TR, keep the receipt and warranty documentation; repeated recurrence may justify a replacement or refund claim.
New iPhone 15 loses charge in standby after iOS 26.0.1
From news report (tengrinews.kz) found via 'Apple iPhone 15 overheating battery drain forum'. After iOS 26.0.1, owners including of a brand-new iPhone 15 with only 22 charge cycles report the battery draining even in standby mode.
What to check. A brand-new iPhone 15 (22 charge cycles) was reported draining battery in standby after iOS 26.0.1, pointing to a software rather than hardware cause. If you see this, try a network-settings reset and check background apps before assuming the battery is defective.
iOS 26 beta battery bug could stop iPhone 15/16 from turning on despite sufficient charge
From Turkish tech-news report (shiftdelete.net) found via 'Apple iPhone 15 sorunları forum'. Apple re-released the iOS 26 developer beta because a bug could show a low-battery icon and prevent the device from turning on despite sufficient charge, affecting only iPhone 15 and 16 models.
What to check. An iOS 26 beta bug could show a low-battery icon and stop an iPhone 15 from turning on even with charge; Apple fixed it by re-releasing the beta. Avoid installing early betas on a daily-driver iPhone 15.
iPhone 15 battery drain and overheating after iOS 26.5; most-affected models
From Spanish tech-news report (hoyaragon.es) found via 'Apple iPhone 15 overheating battery drain forum'. Users report the iPhone 15 and 16 are the most affected by faster battery drain and overheating after the iOS 26.5 update, with battery dropping even while idle.
What to check. After the iOS 26.5 update, iPhone 15 owners report faster battery drain and overheating, with the phone losing charge even lying idle. If you update, expect a few days of re-indexing; if drain persists, disabling unused Apple Intelligence features is the commonly suggested mitigation.
iPhone 15 screen shadow shapes from overheating and battery health dropping to 86% in one year
From Turkish owner complaint (sikayetvar.com) found via 'iPhone 15 Akku Probleme Display Fehler'. A Turkish owner reports overheating starting 3-4 months after purchase causing shadow shapes on the screen, and battery health dropping to 86% within a year; the service center found no fault and only did a software update.
What to check. A Turkish owner reports overheating causing shadow shapes on the screen, and battery health dropping to 86% within a year, while the authorized service said no fault was found. If you see screen shadows, photograph them and request a panel inspection before the warranty lapses.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Smartphones catalog, version 0.1.1, under the CC-BY-SA-4.0 license.
