6 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
iPhone 16 Plus aşırı ısınma ve kendiliğinden kapanma (overheating and random shutdown, TR)
A Turkish owner reports the 16 Plus overheating and shutting itself down on its own shortly after purchase, and the authorized service process dragged on with no resolution. This is a first-hand TR-market owner report of a hardware failure mode.
What to check. Buyers should treat overheating plus random shutdowns as a known failure mode on this model in the TR market, and should keep the receipt and a record of the service visit, since the owner here found the service process slow and unresolved.
iPhone 16 Plus hoparlör ve aşırı ısınma, 4 servis ziyaretine rağmen çözülmedi (speaker + overheating unresolved, TR)
A Turkish owner reports speaker and overheating problems from day one, and that four visits to both the technical service and Apple service (software updates, iCloud reset) did not fix them. A first-hand TR-market report of a hardware failure that persisted through service.
What to check. If buying in the TR market, know that speaker and overheating complaints on the 16 Plus have been reported as persisting even after official service attempts, so a warranty replacement/refund request may be needed rather than a simple fix.
iOS 26 battery drain largest on iPhone 16 Plus (EU)
A Dutch tech outlet reports that after the iOS 26 upgrade, tested iPhones lose battery life noticeably, with the relative drop largest on the 16 Plus despite it having the biggest battery. An EU-market, independent test report of a battery regression tied to a software update.
What to check. EU buyers who care about battery life may want to delay the iOS 26 upgrade on the 16 Plus, since independent testing found the relative battery-life drop was largest on this model after the update.
iPhone 16 series flashing green screen in cold (display)
News reports describe the iPhone 15 and 16 base models (including the 16 Plus) flashing green horizontal lines on the lower half of the screen in cold conditions, with Apple refusing free out-of-warranty screen replacement (~2000 CNY). This is a documented display failure mode for the 16 base lineup, though the reports are from the China market.
What to check. Buyers should be aware of a cold-temperature green-screen flash on the 16 base models; it is intermittent (temporarily disappears when warm) and Apple has declined free replacement out of warranty, so a screen replacement would be out-of-pocket.
A tech journalist reports that disabling Apple Intelligence on the iPhone 16/16 Plus improved battery endurance by roughly 25%, because the on-device AI models are constantly accessed. A software-settings battery drain rather than a hardware defect.
What to check. If battery life is a priority, turning off Apple Intelligence is a free setting change that a reviewer measured to recover roughly 25% endurance on the 16 Plus, before considering any hardware repair.
iPhone 16 Plus software bugs, random shutdowns and broken microphone (EU)
A verified-purchase EU customer review (Czech/Slovak retailer) reports several software bugs, random device shutdowns, and a broken microphone that required Apple support to work around by forcing mono audio. A first-hand EU owner report of software and microphone issues.
What to check. EU buyers may encounter software bugs and random shutdowns on the 16 Plus, and a microphone fault that was only worked around (mono audio) rather than truly fixed, so check the microphone early within the return window.
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.
