Which Smartphone is The Thinnest? From the iPhone Air to Samsung Galaxy S25 Edge Ranked

Achieving the thinnest smartphone in the world is a major challenge that has divided the smartphone market into two competing styles. As far as designs of traditional slab style smartphones go, there are several flagship phones that are contenders for thinnest smartphone title such as the Apple iPhone 17 Air and Samsung Galaxy S25 Slim, both phones have thicknesses measured at approximately 5.3mm to 5.5mm. The ultra-thin designs of both phones are achieved by using very high density silicon/carbon based batteries and a very light weight titanium frame.

On the other hand, if foldables are included as part of the definition of smartphone as a category, tri-folds have achieved the all-time lowest thickness at just 3.6mm fully extended with the Huawei Mate X Ultimate phone being an example; this thinness is actually less than that of a standard USB-C connector and is more like holding a piece of sheet glass that has been engineered to have a very high degree of technology in its design. Both phone types are considered to be the pinnacle of modern design and construction with the trade-offs made in engineering of the very slim phone design with very low battery capacity and very low zoom capability from a periscope zoom lens. When talking about the Indian market, listed below are some of the best smartphones with slimmest body for you to check out. 

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The Quest To Achieve the Thin

Design architecture separates the battle for the thinnest smartphone. Traditional slab-style phones are an example of that, with iPhone 17 Air and Samsung Galaxy S25 Edge both currently hold records for thinness, with the iPhone measuring an incredible 5.64mm and the Galaxy measuring 5.80mm. In order to achieve these ultra-thin profiles, manufacturers have built their devices using ultra light titanium frames and high density silicon carbon batteries which prevent the bending of the phone.

In addition to traditional design architecture, the ultra-thin record design for smartphones also includes modern folding engineering, where the absolute record for thinness still goes to tri-fold devices. 

The flagship devices, such as the Huawei Mate XT Ultimate, measure an astounding 3.6mm in thickness, the body is thinner than an average USB-C port. The trade-offs for these designs which could be further compromised due to the necessary trade-offs in battery and zoom lens size, however, are the ultimate examples of advanced structural craft in today's technological society.

Apple iPhone Air (256 GB, Sky Blue)

The iPhone Air redefines modern smartphone design as the thinnest iPhone ever made. Measuring an impossible 5.6 mm, its ultralight titanium frame and Ceramic Shield 2 construction ensure premium durability without adding bulk. This iPhone Air has a sleek and classy look that gives its it a chic aesthetic appeal. With that, it is equipped with hyper-efficient A19 Pro chip that ensures smooth and lag-free performance at all times. The ProMotion 120Hz display pairs beautifully with the brand-new iOS Liquid Glass interface. Photography gets a massive upgrade with a 48MP Fusion camera system featuring 2x Telephoto, alongside an innovative 18MP Center Stage front camera supporting Dual Capture video. Despite of the slim design, this Apple iPhone comes with a long lasting battery life of up to 27 hours, depending on the usage. 

Specifications:

• Operating System: iOS
• RAM Memory Installed Size: 0.1 GB
• CPU Speed: 0.1 Ghz 
• Capacity: 256 GB
• Colour: Sky Blue
• Camera: 48MP
• Battery Life: up to 27 Hours 
• Display: Super Retina XDR display 16.63 cm (6.5in) (diagonal) all‑screen OLED display 2736x1260‑pixel resolution at 460 ppi

Pros:

• Offers a good performance with minimal lags. 
• Sleek and classy looks. 
• Easy to use functionality. 
• High-grade display ensures clear and sharp visuals. 

Cons:

• Battery life related issues were faced by some users.  

Samsung Galaxy S25 Edge 5G (Jet Black, 512 GB)

Samsung is another top smartphone brand and offers a wide range of option to check out an choose from. Just like this model of Samsung Galaxy S25 that comes in a jet black colour and more options to choose from. The Samsung Galaxy S25 Edge 5G combines engineering with art and is the thinnest phone to date at just 5.8 mm thick. The 5G smartphone uses the exclusive Snapdragon 8 Elite for Galaxy processor to provide extremely fast processing for artificial intelligence, multitasking seamlessly on One UI, and playing games without disruption. The highlight of this Samsung smartphone is the next-generation advanced 200-megapixel camera system, which, when combined with the advanced AI-Powered ProVisual Engine, transforms mobile photography from quick shots into high-end studio-quality creative images. The Galaxy S25 Edge is built on next-gen Samsung AI and will adapt to your daily routine and anticipate your needs and provide pro-level assistance. Plus, with defense-grade Knox Security keeping your information secure and a secure Samsung Wallet for quick payments, which makes it a must to check out if you do not have budget issues. 

Specifications:

• Operating System: Android 15.0
• RAM Memory Installed Size: 12 GB
• CPU Model: Snapdragon 8 Elite
• CPU Speed: 4.47 GHz
• Capacity: 512 GB
• Colour: Jet Black
• Camera: 200 MP
• Battery Life: 3900 Milliamp Hours 
• Display: AMOLED

Pros:

• Offers lag-free and seamless performance. 
• Camera quality is quite good. 
• Sleek looks with tough build.  

Cons:

• Battery life related issues were faced by some users.  

Apple iPhone 15 (128 GB, Black)

Apple iPhone 15, has a beautiful, durable design made of colored glass and metal that is resistant to dust, water and splashes. The front of the phone is made with ceramic that is much tougher than other smartphones and protects a screen that is a super high-resolution retina display. The display is twice as bright when in direct sunlight. At the heart of the phone is Apple's new Dynamic Island concept that provides users with alert notifications, real-time updates about their flights, and real-time updates about Live Activities in an intuitive way. This smartphone has a 48 megapixel high-resolution camera that has an optical grade lens to take stunning close-up pictures, and allows users to change the focus of an image after the image has been taken. It is equipped with A16 Bionic chip allows for massively powerful photographic processing, voice isolating so that calls are crystal-clear, smooth user interface transitions, and the ability to have battery life that lasts through the entire day, which makes it one of the best slimmest smartphones on the market for premium audience. 

Specifications:

• Operating System: iOS
• Memory Storage Capacity: 128 GB
• Screen Size: 6.1 Inches
• Resolution: 2556x1179
• Colour: Black
• Camera: 48MP
• Battery Life: NA
• Display: Super Retina XDR display

Pros:

• Overall quality is quite reliable. 
• Value for money. 
• High grade camera captures everything precisely. 
• Sleek and classy design. 

Cons:

• Heating related issues were faced by some users.  

Motorola Moto G34 5G (Ice Blue, 128 GB)

If you are looking for a good smartphone under 20000, then this can be an ideal pick to consider.  With 8GB of RAM to enable fluid navigation throughout your daily tasks regardless of whether you are using social media, streaming videos messaging, this 5G smartphone is equipped to handle whatever your social networking or communication needs may be. With a high speed Snapdragon processor capable of up to 2.2 GHz of processing speed, you have plenty of power for mobile gaming, photography, and general productivity activities. With 128GB of what is also called the standard amount of installed internal storage that will allow you to store a large number of important things such as apps, movies and pictures, you can have peace of mind while you enjoy the Motorola smartphone with an overall clean experience due to the nature of their signature software experience. Overall, this phone provides value, power and style for budget conscious individuals in need of dependable, high speed connections.

Specifications:

• Operating System: Android 14
• RAM Memory Installed Size: 8 GB
• CPU Model: Snapdragon
• CPU Speed: 2.2 GHz
• Capacity: 128 GB
• Colour: Ice Blue
• Camera: 16.0, 2.0 MP
• Battery Life: 5000 Milliamp Hours
• Display: LCD

Pros:

• Value for money. 
• Overall quality is quite good. 
• Classy and chis appearance. 

Cons:

• Performance, battery life, and heating related issues were faced by some users. 

Tecno Pova Slim 5G (Sky Blue, 128 GB)

Among the record-setting devices available today is the Tecno Pova smartphone, which has broken records as the thinnest smartphone in the world with a 3D curved display and support for 5G networks. You can perfectly use your phone outdoors because the Tecno Pova Slim comes with a stunning 1.5K AMOLED display that supports 144Hz refresh rates, 4500 NITS peak brightness, and a high level of outdoor visibility. In addition, you will love the world's first Dynamic Mood Light Design of the Tecno Pova Slim, which provides a unique back panel that lights up responsively as a result of your mood and notifications. This extremely thin and lightweight device has a large 5160mAh battery specifically designed for maximum endurance. Although the Tecno Pova Slim is built tough enough to survive military-grade tests, it has also been certified to provide up to five years of lag-free, fluent performance as a result of its IP64-rated dust- and splash-resistant enclosure. 

Specifications:

• Operating System: Android 15
• RAM Memory Installed Size: 8 GB
• CPU Model: Others
• CPU Speed: 2, 2.5 GHz
• Capacity: 128 GB
• Colour: Sky Blue
• Camera: 50 MP
• Battery Life: 5160 Milliamp Hours 
• Display: AMOLED

Pros:

• Slim and sleek design.
• User-friendly interface.
• Value for money. 
• Offers a long lasting battery for uninterrupted entertainment.
• Lightweight and durable design.   

Cons:

• Performance and display got mixed user reviews. 

Read More: Best Infinix Smartphones

How a Slim Body Affects Smartphone Performance and Battery Life

• Performance & Thermals: High-end processors generate intense heat under heavy loads. Thinner chassis leave minimal room for robust internal cooling mechanisms like thick vapor chambers or copper heat pipes. Without adequate space to dissipate heat, thin phones experience faster thermal throttling, where the software intentionally slows down the CPU and GPU to prevent overheating.
• Battery Life: Battery capacity is directly tied to physical volume. Slimmer profiles restrict the physical size of the lithium-ion cell, typically forcing manufacturers to use smaller capacities often around 4,000-4,500mAh instead of the bulkier 5,000-6,000mAh standards.