Samsung Phone Android 2021
Samsung Galaxy S21 5G
Samsung Samsung Galaxy S21 5G is an Android phone with released in 2021, a 6.2-inch display, the Snapdragon 888 chipset, 8GB RAM and 128GB storage, a 4000 mAh battery, a 64MP main rear camera.
Launch MSRP
$799.99
Official launch reference price.
Lowest New Price Found
$159
eBay · New
Current offers
Compare current merchant options for this phone. Prices and availability can change; carrier deals may require plans, trade-ins, financing, or bill credits.
Lowest New Price Found: eBay
New · 98.6 Positive Feedback, 1,270 Seller Reviews
$159
eBay
New
Brand New Samsung Galaxy S21 FE 5G SM-G990U1 128GB+6GB 6.4" Unlocked BLACK
New
$159
Shipping shown at checkout
98.6 Positive Feedback, 1,270 Seller Reviews
eBay
New
Samsung Galaxy S21 FE 5G SM-G990U 128GB Unlocked Android GSM CDMA New Sealed
New
$167
Shipping shown at checkout
99.8 Positive Feedback, 507 Seller Reviews
Amazon
Exact product link
Exact product affiliate link
Product-level link
View current price
Check listing
Uses the manual affiliate URL saved on this product. This outranks Amazon search.
eBay
Renewed / refurbished
Samsung Galaxy S21 5G 128GB G991U Unlocked - Good
Good - Refurbished
$130
Shipping shown at checkout
99.4 Positive Feedback, 196,188 Seller Reviews
eBay
Renewed / refurbished
Samsung Galaxy S21 5G SM-G991U - 128/256GB - All Carriers - Good
Good - Refurbished
$130
Shipping shown at checkout
99.4 Positive Feedback, 13,651 Seller Reviews
eBay
Renewed / refurbished
Samsung Galaxy S21 5G SM-G991U1 128GB 256GB Unlocked Good Refurbished
Good - Refurbished
$130
Shipping shown at checkout
98.9 Positive Feedback, 177,223 Seller Reviews
eBay
Search fallback
eBay new + renewed/refurbished search
Renewed / refurbished
Search current offers
Varies
Search excludes regular used by default. Check listing condition before buying.
Best Buy
Retail search
Best Buy phone search
New / Open-box when available
Search current offers
Pickup/shipping varies
Check unlocked status, activation requirements, and return window.
Verizon
Carrier terms
Verizon carrier offer search
Carrier deal
Review terms
Plan terms vary
May require plan, financing, bill credits, or trade-in.
Lowest is not always safest Seller quality, return policy, and lock status can matter more than a small price difference.
Carrier terms matter “Free” phone deals may require trade-ins, financing, bill credits, or specific plans.
Marketplace checks Verify IMEI, blacklist status, battery health, and exact photos before buying used.
MSRP is separate Launch MSRP is historical. Current offers are live or merchant-specific rows.
As an independent publisher, CheapCellPhones.com may earn a commission if you buy through some links. This does not change our guidance or price checks.
Overview
| Brand | Samsung |
|---|---|
| Product line | Galaxy S21 |
| Model number | SM-G991B |
| Release year | 2021 |
| Release date | 2021-01-29 |
| Form factor | Bar |
| Current model | No |
| Refurb available | Yes |
Display and performance
| Display size | 6.2 in |
|---|---|
| Resolution | 2400x1080 |
| Display type | Dynamic AMOLED 2X |
| Refresh rate | 120 Hz |
| Brightness | 800 nits |
| Chipset | Snapdragon 888 |
| Chip maker | Qualcomm |
| RAM | 8 GB |
| Storage | 128 GB |
| Expandable storage | No |
Battery and charging
| Battery | 4000 mAh |
|---|---|
| Wired charging | 25 W |
| Wireless charging | 15 W |
| Reverse wireless charging | Yes |
Cameras
| Rear cameras | 3 |
|---|---|
| Main rear camera | 64 MP |
| Main aperture | f/1.8 |
| Optical zoom | 3x |
| Max rear video | 4K@60fps |
| Front camera | 10 MP |
Software, security, and build
| Operating system | Android |
|---|---|
| OS at launch | Android 11 (One UI 3.1) |
| Max OS version | Android 14 (One UI 6.1) |
| Security updates until | 2025-01-01 |
| Major update count | 4 |
| Fingerprint | Under-display optical |
| IP rating | IP68 |
| Weight | 169 g |
| Height | 151.7 mm |
| Width | 71.2 mm |
| Depth | 7.9 mm |
Connectivity and compatibility
| 5G capable | Yes |
|---|---|
| NFC | Yes |
| SIM type | Nano-SIM + eSIM |
| Dual SIM | Yes |
| Factory unlocked | Yes |
| AT&T | Full |
| T-Mobile | Full |
| Verizon | Full |
| Categories | 5G Phones, Android Phones, Bar Phones, Prepaid Compatible, Refurb Available, Unlocked Phones |
| Carrier compatibility | AT&T Compatible, T-Mobile Compatible, Unlocked, Verizon Compatible |