Ultra-Slim Phones Are Overrated in 2025 — 8 Reasons Why

In previous years, smartphone manufacturers had tough competition to create the thinnest handset. Fast-forward to 2025, the users expect to have a phone with robust performance, enhanced battery life, high refresh rates, and so on. So, the ultra-slim phones are becoming questionable because of multiple limitations for hardware and other issues. The present situation is showcasing that the trend of slim phones wouldn’t catch on.

Smartphones are embedded with the latest cameras to offer awesome photo capturing functionality while offering larger sensors, three to four cameras, etc., so the cameras require a large space for lenses and internal mirrors. So, it isn’t possible with slimmer phones such as the Galaxy S25 Edge has only a primary camera along with an ultra-wide shooter, and you wouldn’t find any telephoto lens. So, it is a big issue for a user who pays top bucks, and can’t find the same camera functionality.

In the modern era, smartphones are used for multiple power-intensive functions, including streaming high-definition videos, gaming, running heavy apps, and so on. When we use such power-intensive apps, our mobile battery drains quickly. The slimmer phones have 3900 mAh, and in contrast, a larger smartphone offers 4500 to 5000mAh battery capacity that will last for the whole day. No doubt, the slimmer mobiles have fast-charging capabilities, but it isn’t a perfect compensation, as it is an inconvenient process to charge the mobile frequently.

The chipset used in smartphones produces heat when it reaches limits, i.e, online heavy gaming, multitasking activities, increased brightness, etc. The problem with smartphones is that there isn’t a fan available similar to laptops. So manufacturers use vapor chambers to cool down the device quickly. But within a slimmer handset, it is a difficult task for a manufacturer to set a vapor chamber, as it requires space. So the dissipation of heat is slow, and as a result, the CPU starts throttling and decreases its performance. So, a slimmer phone isn’t convenient for intensive tasks, including gaming, photo or video editing, etc.

Currently, the smartphones with 5G and Wi-Fi7 that need multiple antennas for quick and stable connection enable to serve optimal performance. It is necessary when you require a device with high-speed data transfer and low-latency communication. On slimmer designs, the internal space is limited and makes the placement of antennas difficult, and the result in poor signals and slow data speed. Compared, the larger devices have sufficient space to adjust antennas while minimizing the interference, and enhancing the connectivity performance.

The slimmer phones, no doubt, look gorgeous, but they can bend in case of external pressure, such as keeping them in a tight denim pocket. Latest smartphones have a metallic frame with glass front/back, and the chassis isn’t capable of bearing even a slight degree of pressure, as glass shatters easily. Whereas, the thicker phone decreases the possibility of the aforementioned issue while offering a better reinforcement.

Latest software requires a larger screen to offer an optimized user experience, no matter, you want to run productivity apps, entertainment, or tutorial content. Multiple features, including split-screen multitasking, Picture-in-picture mode, media editing, and so on, can offer better performance on the larger screen. In comparison, the smaller smartphones couldn’t serve as a larger one, and fail to display spacious layouts with improved intuitive navigation.

Most of the users love to loud and crisp speaker setup, as they use loudspeakers to consume content on their phones. However, a good speaker requires a larger speaker cavity to output a louder sound, especially when you are watching movies. In contrast, the slimmer phones have a narrow cavity, so they have smaller speaker modules, or users have to use headphones, which disappoints users a lot.

The manufacturers offer multiple small extra perks for smartphones to enhance the functionality of their phone, such as Apple and Oppo designed their devices with a camera shutter button. Likewise, Xiaomi and Vivo have offered IR blasters to enable users to use their smartphones for controlling their TVs, ACs, and so on. But, thinner phones have limited space, so most of such features are deprived.