Imagine this: you're engrossed in a gaming session on your brand-new smartphone when, suddenly, the screen goes black, and the device restarts, wiping out your game progress. Or, you're casually scrolling through Douyin or chatting on WeChat, and the phone crashes without warning.

You've invested thousands, or even tens of thousands, in an annual flagship model, only to find it struggling to meet the most basic stability requirements.

This scenario is far from unique.

In the autumn of 2026, several flagship smartphones powered by TSMC's 2nm process chips encountered widespread malfunctions.

01 iPhone 18 Pro

Unlocking Triggers Restarts

Numerous early adopters of the iPhone 18 Pro and Pro Max reported that their devices would freeze briefly, display the Apple logo on a black screen, and undergo a soft restart when unlocked in low-light conditions, held at an angle, or when using Face ID for payment verification via WeChat or other payment apps.

Some users reported experiencing up to five restarts in a single day.

Apple later confirmed that the issue was due to a memory allocation error in the new system's facial recognition sensor depth map processing algorithm—a software-level bug, not a hardware defect.

The problem was resolved with the release of iOS 27.0.1 on September 29.

However, just as the Face ID issue was resolved, signal problems emerged.

According to public reports, some U.S. versions of the iPhone 18 Pro Max suddenly lost cellular connectivity, displaying "SOS" in the status bar. Users were unable to make calls, send texts, or use mobile data, leaving only Wi-Fi functional.

The affected models primarily used Qualcomm's Snapdragon X80 modem with AT&T networks, while iPhone 18 Pro models equipped with Apple's in-house C2 modem were unaffected.

More concerningly, this issue could not be resolved through system updates. Apple confirmed it as a hardware defect, leaving affected users with no option but to replace their devices.

02 Android Camp

Gaming and Douyin-Induced Restarts?

Beyond iPhones, Android flagships also faced significant stability issues.

Users on platforms like Coolapk and NGA reported concentrated problems with new devices overheating, freezing, and automatically restarting.

Some users experienced sudden black screens during team battles in Honor of Kings, requiring a long press of the power button to recover—and losing their game progress in the process. Others reported restarts while scrolling through Douyin. Some users discovered, after reviewing system logs, that their devices had secretly restarted eleven times in a week.

What's causing these problems?

Qualcomm pushed the primary core frequency to 5.01GHz, while MediaTek's Dimensity 9600 Pro settled at 4.55GHz.

This 10% frequency gap resulted in a power consumption difference far exceeding 10%. The relationship between chip power consumption and frequency is non-linear; higher frequencies lead to exponentially faster increases in power consumption.

Image Source: Internet

Test data indicates that peak power consumption at 5.01GHz is approximately 30% to 50% higher than at 4.55GHz. All this additional power converts into heat, while the internal cooling space of smartphones remains limited.

Once heat generation exceeds dissipation capacity, the chip reaches its thermal threshold, triggering protective frequency reductions or, in severe cases, direct restarts.

Qualcomm's decision to push frequencies to 5.01GHz was aimed at achieving leadership in benchmark scores and peak performance.

MediaTek's choice of 4.55GHz represented a more conservative balance between power consumption and heat generation.

Both chips are based on TSMC's 2nm process, but Qualcomm operates with narrower safety margins and less tolerance for errors.

When cooling fails to keep pace, problems inevitably arise.

Industry insiders note that some flagship models, in pursuit of sleek designs, have significantly reduced internal space, compromising cooling under heavy loads and triggering protective restarts due to overheating.

This situation echoes the issues with the Snapdragon 888, which also pushed frequencies to the limit, leading to uncontrollable power consumption that was only stabilized through OTA frequency locks.

03 Incomplete Mastery of the 2nm Process

The root cause of these malfunctions lies in TSMC's 2nm process itself.

The 2nm process represents a complete iteration, upgrading transistor architecture from FinFET to GAA (Gate-All-Around), achieving unprecedented transistor density. This leaves extremely limited room for error in leakage, heat generation, and computational power scheduling.

Image Source: Internet

According to market information from April 2026, initial yields for TSMC's N2P process stabilized between 60% and 70%. Manufacturers rushed into mass production before fully understanding its physical characteristics.

Smartphone brands, as end-users, rely on chips from foundries and require complex system adaptations.

When uncertainty arises at the chip level, neither Apple nor domestic high-end models can remain unaffected.

04 How Can Consumers Protect Themselves?

First, avoid being an early adopter.

The first batch of products using new processes typically experiences the most significant yield fluctuations and software adaptation issues. Wait one or two months, observe real user feedback, and then make a decision.

Second, prioritize stability over peak performance.

Impressive benchmark scores do not guarantee smooth daily use. Avoiding black screens during gaming or restarts while watching videos is far more important than scoring 100,000 points higher in AnTuTu.

Third, assert your rights promptly when issues arise.

The signal problem with the iPhone 18 Pro Max constitutes a hardware defect, for which Apple has opened replacement channels. For stability issues with Android chips that system updates cannot resolve, demand replacements or refunds.

Specifications are just numbers for press conferences; stability is what you experience daily. A smartphone may lack a 200MP camera or a 165Hz refresh rate, but it must not restart halfway through a gaming session. #FlagshipSmartphones