Samsung Galaxy S21

Quick Facts

Feature	Details
Launch Year	2021
Display	6.2-inch FHD+ Dynamic AMOLED 2X Infinity-O Display
Processor	Exynos 2100 / Snapdragon 888, depending on market
Camera System	12MP Wide + 12MP Ultra Wide + 64MP Telephoto
Battery	4,000mAh
Storage Options	8GB RAM / 128GB or 256GB Storage
Charging Port	USB-C
Weight	169g / 171g, depending on network variant

Overview

The Samsung Galaxy S21 is the compact model in the Galaxy S21 series, designed for users who want a modern Samsung flagship with 5G, smooth display performance and strong everyday camera features.

It features a 6.2-inch FHD+ Dynamic AMOLED 2X Infinity-O display, adaptive 120Hz refresh rate, Exynos 2100 or Snapdragon 888 processor depending on market, 8GB RAM, 128GB or 256GB storage, triple rear cameras, 10MP front camera, 4,000mAh battery, USB-C charging, wireless charging, Wireless PowerShare, IP68 water resistance and 5G support.

Compared with the Galaxy S20, the Galaxy S21 has a newer processor, refreshed design, adaptive 120Hz display and stronger long-term performance. However, it does not support microSD card expansion, which may matter to users who store many photos and videos.

The Galaxy S21 is suitable for users who want a compact Samsung phone for calls, messaging, browsing, mobile banking, photos, videos, social media and everyday apps, with 5G connectivity where network coverage is available.

Key Highlights

Compact 6.2-inch 120Hz Display

The Galaxy S21 has a 6.2-inch FHD+ Dynamic AMOLED 2X display with adaptive 120Hz refresh rate.

Why it matters:

• Smooth scrolling and screen movement

• Compact size compared with larger Plus and Ultra models

• Bright and vibrant AMOLED display for videos and daily apps

• Good balance between screen size and one-handed use

• Suitable for users who prefer a smaller flagship phone

Triple Rear Camera System

The Galaxy S21 has a triple rear camera system with Wide, Ultra Wide and 64MP Telephoto cameras.

Why it matters:

• Flexible setup for everyday photos and videos

• Ultra Wide camera is useful for scenery, interiors and group photos

• 64MP Telephoto camera supports closer framing and zoom shots

• Suitable for social media, travel and casual photography

• Strong camera setup for a compact Samsung flagship

5G with Flagship Performance

The Galaxy S21 supports 5G and uses a flagship-level processor from its launch year.

Why it matters:

• Faster mobile data where 5G coverage is available

• Better performance than older Galaxy S10 and S20 models

• Suitable for multitasking and daily apps

• More future-ready than older 4G-only Samsung phones

• Good option for users who want a compact 5G Samsung device

Key Features Explained

Feature	Specification	Why It Matters
Display	6.2-inch FHD+ Dynamic AMOLED 2X Infinity-O Display	Compact and vibrant display for daily use
Display Resolution	2400 x 1080	Clear enough for reading, browsing and videos
Refresh Rate	Adaptive 120Hz	Smoother scrolling and screen movement than older 60Hz models
Processor	Exynos 2100 / Snapdragon 888, depending on market	Former flagship processor suitable for daily apps and multitasking
RAM & Storage	8GB RAM / 128GB or 256GB Storage	Suitable for apps, photos, videos and daily files
microSD Support	Not Supported	Important to note if you need expandable storage
Rear Camera System	12MP Wide + 12MP Ultra Wide + 64MP Telephoto	Flexible camera setup for daily photos, wide shots and zoom
Main Camera	12MP Wide with Dual Pixel AF and OIS	Suitable for everyday photos and videos
Ultra Wide Camera	12MP Ultra Wide	Useful for scenery, group shots and tight spaces
Telephoto Camera	64MP Telephoto with OIS	Useful for zoom shots and higher-resolution cropping
Front Camera	10MP Dual Pixel Selfie Camera	Suitable for selfies and video calls
Video Recording	8K Video Recording up to 24fps	High-resolution video capture for advanced users
Battery	4,000mAh	Practical battery capacity for a compact flagship
Charging	USB-C with 25W Super Fast Charging support	Faster wired charging with a compatible charger
Wireless Charging	Supported	Convenient charging without cable
Wireless PowerShare	Supported	Can share battery with compatible Qi devices
Water Resistance	IP68	Protection against dust and accidental water exposure
Network	5G	Faster mobile data where 5G coverage is available
Weight	169g / 171g, depending on network variant	Lightweight compared with larger Samsung flagship models

Compare the Galaxy S21 Series

Feature	Galaxy S20 5G	Galaxy S21	Galaxy S21+	Galaxy S21 Ultra
Launch Year	2020	2021	2021	2021
Display	6.2-inch Dynamic AMOLED 2X	6.2-inch Dynamic AMOLED 2X	6.7-inch Dynamic AMOLED 2X	6.8-inch Dynamic AMOLED 2X
Display Resolution	3200 x 1440	2400 x 1080	2400 x 1080	3200 x 1440
Refresh Rate	Up to 120Hz	Adaptive 120Hz	Adaptive 120Hz	Adaptive 120Hz
Processor	Exynos 990 / Snapdragon 865	Exynos 2100 / Snapdragon 888	Exynos 2100 / Snapdragon 888	Exynos 2100 / Snapdragon 888
RAM & Storage	12GB / 128GB	8GB / 128GB or 256GB	8GB / 128GB or 256GB	12GB or 16GB / up to 512GB
Rear Camera System	12MP + 12MP + 64MP	12MP + 12MP + 64MP	12MP + 12MP + 64MP	108MP + 12MP + 10MP + 10MP
Front Camera	10MP	10MP	10MP	40MP
Battery	4,000mAh	4,000mAh	4,800mAh	5,000mAh
microSD Support	Supported	Not Supported	Not Supported	Not Supported
Network	5G	5G	5G	5G
Water Resistance	IP68	IP68	IP68	IP68
Weight	163g	169g / 171g	200g / 202g	227g
Best Advantage	Sharper display and microSD	Compact S21 with 5G	Larger display and battery	Best S21 camera and display

Which Galaxy S21 Model Should You Choose?

Model	Recommended For
Galaxy S21	Users who want a compact Samsung flagship with 5G
Galaxy S21+	Users who want a larger display and bigger battery
Galaxy S21 Ultra	Users who want the best S21 camera system, display and premium features
Galaxy S21 FE 5G	Users who want a value-focused S21-style phone with a larger display

Alternatives to the Galaxy S21

If you’re considering the Galaxy S21, you may also want to compare:

• Samsung Galaxy S20 5G

• Samsung Galaxy S20 FE 5G

• Samsung Galaxy S21 Plus

• Samsung Galaxy S21 Ultra

• Samsung Galaxy S22

• Apple iPhone 13

Comparing similar models can help you decide whether you need a larger display, better battery life, stronger camera hardware, newer software support, microSD storage or a different operating system.

Common Questions

Is the Samsung Galaxy S21 good for everyday use?

The Galaxy S21 is suitable for everyday use such as calls, messaging, browsing, email, mobile banking, photos, video watching and social media. It is a compact flagship with 5G, smooth 120Hz display and strong daily performance.

Does the Galaxy S21 support 5G?

Yes. The Galaxy S21 supports 5G where network coverage and carrier support are available.

Does the Galaxy S21 support microSD card?

No. The Galaxy S21 does not support microSD card expansion. Choose the storage size carefully, especially if you store many photos, videos or apps.

Does the Galaxy S21 support wireless charging?

Yes. The Galaxy S21 supports wireless charging. It also supports Wireless PowerShare, which can share battery with compatible Qi wireless charging devices.

Is the Galaxy S21 better than the Galaxy S20?

The Galaxy S21 has a newer processor, refreshed design and improved long-term performance. The Galaxy S20 has a sharper Quad HD+ display and microSD support. Choose the Galaxy S21 if you prefer newer performance and design, and choose the Galaxy S20 if expandable storage is more important.

Is the Galaxy S21 worth buying in Singapore?

The Galaxy S21 is worth considering if you want a compact Samsung flagship with 5G, 120Hz AMOLED display, wireless charging, IP68 water resistance and strong everyday performance. For better battery life, stronger cameras or a larger display, compare it with the Galaxy S21+, Galaxy S21 Ultra or newer Galaxy S models.

Why Buy the Samsung Galaxy S21?

The Samsung Galaxy S21 is suitable for users who want a compact Samsung flagship with 5G connectivity, smooth display performance and practical daily features. It offers a 6.2-inch FHD+ Dynamic AMOLED 2X display, adaptive 120Hz refresh rate, Exynos 2100 or Snapdragon 888 processor depending on market, 8GB RAM, up to 256GB storage, triple rear cameras, 10MP front camera, 4,000mAh battery, USB-C charging, wireless charging, Wireless PowerShare, IP68 water resistance and a lightweight body.

Compare available Galaxy S21 listings by colour, storage capacity, condition and warranty from verified local sellers on SellUp Marketplace.