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Galaxy S21 Ultra 5G Vs iPhone 15 Plus
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Differences at a glance
The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the iPhone 15 Plus, launched in September 2023, represent distinct approaches to high-end smartphone design and functionality. While both offer premium experiences, they differ significantly in their operating systems, camera capabilities, and display technologies. The Galaxy S21 Ultra operates on Android, offering a customizable interface, whereas the iPhone 15 Plus runs on iOS, known for its integrated ecosystem.
Available Models
Colour
Storage (GB)
Scores
Durability
When considering the practical lifespan of these devices, several factors come into play, including software support and physical resilience.
- Release Timeline: The Galaxy S21 Ultra 5G was released in January 2021, making it an older model compared to the iPhone 15 Plus, which debuted in September 2023. This difference in release year directly impacts their remaining software support cycles.
- Software Longevity: Apple has committed to a minimum of five years of software support for the iPhone 15 series from its release date, extending to at least September 2028, and often provides security updates for longer. Samsung typically offers several years of major Android updates and security patches for its flagship devices, though the S21 Ultra, being an older model, will have fewer remaining updates compared to the newer iPhone 15 Plus.
- Repairability: The Galaxy S21 Ultra received a repairability score of 3 out of 10 from iFixit, indicating challenges due to extensive use of adhesive and a non-modular display cable. The iPhone 15 Plus features a Ceramic Shield front cover, designed for enhanced durability.
Year of Release
2021
2023
Compatible with latest Update
Yes
Yes
OS
Android
iOS
Foldable
No
No
Performance
Both devices offer robust performance for daily tasks and demanding applications, though they achieve this through different hardware and software optimizations.
- Processor Capabilities: The iPhone 15 Plus is powered by a current-generation chip, which provides efficient performance for multitasking, gaming, and demanding applications. The Galaxy S21 Ultra 5G features a powerful processor that handles intensive tasks and gaming smoothly, maintaining strong performance even several years after its release.
- Storage and RAM: The Galaxy S21 Ultra 5G offers configurations with 12GB or 16GB of RAM, alongside storage options up to 512GB. The iPhone 15 Plus comes with 6GB of RAM and storage options up to 512GB. The higher RAM in the S21 Ultra can be beneficial for extensive multitasking, while iOS's optimization often allows for smooth performance with less RAM.
- Battery Behavior: The iPhone 15 Plus is noted for its excellent battery life, often lasting more than a full day even with heavy usage, attributed to its efficient processor and software optimizations. The Galaxy S21 Ultra 5G, equipped with a larger battery, generally provides all-day power, though its adaptive high-resolution, high-refresh-rate display can impact endurance with continuous heavy use.
Screen quality
The visual experience on both smartphones is a highlight, with each offering a large, vibrant display tailored for media consumption and daily interaction.
- Display Technology and Size: The Galaxy S21 Ultra 5G features a 6.8-inch Dynamic AMOLED 2X display, offering a high-resolution and adaptive refresh rate. The iPhone 15 Plus comes with a 6.7-inch Super Retina XDR OLED display, known for its color accuracy and contrast.
- Resolution and Brightness: The S21 Ultra 5G boasts a QHD+ resolution (3200x1440 pixels) with a pixel density of 515 PPI and a peak brightness of up to 1500 nits. The iPhone 15 Plus offers a resolution of 2796x1290 pixels at 460 PPI, with a higher peak outdoor brightness of up to 2000 nits, ensuring visibility in bright conditions.
- Refresh Rate: The Galaxy S21 Ultra 5G features an adaptive refresh rate that can scale from 10Hz to 120Hz, providing smooth scrolling and responsiveness while conserving battery. The iPhone 15 Plus maintains a standard 60Hz refresh rate.
Resolution
1440 x 3200
1290 x 2796
Screen type
Dynamic AMOLED 2X
Super Retina XDR OLED
Audiovisual
Both devices offer advanced camera systems designed to capture high-quality photos and videos in various conditions.
- Camera System Configuration: The Galaxy S21 Ultra 5G features a versatile quad-camera setup, including a 108MP main sensor, a 12MP ultrawide lens, and two 10MP telephoto lenses offering 3x and 10x optical zoom. The iPhone 15 Plus utilizes an advanced dual-camera system with a 48MP main camera that enables a 2x telephoto option, alongside a 12MP ultrawide lens.
- Photography Performance: The S21 Ultra is praised for its detailed images, especially with its zoom capabilities, and offers 8K video recording. The iPhone 15 Plus delivers improved low-light performance and enhanced portrait photography with features like Focus and Depth Control.
- Audio Experience: While specific details on audio quality were less prominent in the provided information, both devices, as flagship-tier smartphones, are expected to offer clear microphone quality for calls and capable stereo speakers for media consumption.
Main camera
108 megapixels
48 megapixels
Front camera
40 megapixels
12 megapixels
Miscellaneous
Beyond core performance and display, several practical features and design elements differentiate these two smartphones.
- Connectivity and Ports: Both devices support 5G connectivity. The Galaxy S21 Ultra 5G also includes Wi-Fi 6E and Ultra Wideband (UWB) technology. The iPhone 15 Plus features a USB-C port for charging and data transfer, a notable change from previous iPhone models. The S21 Ultra also uses a USB-C port.
- Biometrics and Design: The Galaxy S21 Ultra 5G incorporates an in-screen ultrasonic fingerprint sensor. The iPhone 15 Plus relies on Face ID for secure authentication and introduces the Dynamic Island, an interactive area around the front camera cutout. The S21 Ultra has a glass back and aluminum frame, while the iPhone 15 Plus features a color-infused glass back and an aluminum design with contoured edges.
- Physical Characteristics: The Galaxy S21 Ultra 5G weighs between 227-229 grams and measures 165.1 x 75.6 x 8.9mm. The iPhone 15 Plus is lighter at 201 grams and has dimensions of 160.9 x 77.8 x 7.8mm.
Weight
227 g
171 g
Screen size (in)
6.8
6.7
Network
5G
5G
SIM card
Dual Physical SIM + eSIM
eSIM
Carrier compatibility
Unlocked
Unlocked
Connector
USB-C
USB-C (USB 2)
What the community thinks
The Samsung Galaxy S21 Ultra 5G and the iPhone 15 Plus cater to users with differing priorities, reflecting their respective ecosystems and design philosophies. User feedback for the Galaxy S21 Ultra often praises its versatile camera system, particularly its zoom capabilities, and its vibrant, high-resolution display. Some common criticisms have included its weight and the impact of its high-refresh-rate display on battery life under continuous heavy use.
The iPhone 15 Plus receives consistent acclaim for its exceptional battery life, large and bright OLED display, and the introduction of the Dynamic Island for interactive alerts. Users also appreciate its camera upgrades and the shift to USB-C connectivity. A frequent point of discussion is its 60Hz refresh rate, which some users note as a difference compared to other premium smartphones.
Users prioritizing a highly customizable Android experience with extensive camera zoom capabilities and a high-refresh-rate display may find the Galaxy S21 Ultra 5G well-suited to their needs. Conversely, those who value extended battery life, a streamlined iOS experience, and a bright display for outdoor viewing might lean towards the iPhone 15 Plus. Both devices offer robust performance for everyday use and demanding applications. For those considering a more sustainable choice, exploring quality-assured refurbished options for either model can provide an eco-friendly alternative.









