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Samsung Galaxy S21 5G in Phantom White, flat glass back, triple camera array, 6.2 inch display

SAMSUNG

Samsung Galaxy S21 5G G991U 128GB Phantom White cell phones - unlocked

SKU CH-40GG-5Z3RS

A 6.2 inch Android smartphone with a triple 64 MP camera, 128 GB storage and 8 GB RAM, factory unlocked for GSM and CDMA networks

  • CPUOcta-core (1 × 2.84 GHz Kryo 680 & 3 × 2.42 GHz Kryo 680 & 4
  • Storage drive128 GB
  • Connection optionsWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
  • Operating systemAndroid
  • Cellular bandsWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
  • Built-in sensorsFingerprint (under display, ultrasonic), accelerometer, gyro
  • 2" Dynamic AMOLED 2X display for vivid visuals
  • Triple rear camera with 64 MP main sensor for detailed photos
  • 8 GB RAM and octa-core processor for smooth multitasking
  • 128 GB internal storage for apps and media
  • Factory unlocked for use on major U.S. networks

Unlocked Samsung Galaxy S21 5G 128GB

The Samsung Galaxy S21 5G G991U is an unlocked Android smartphone with 128GB storage and 8GB RAM. It runs on an octa-core processor with speeds up to 2.84 GHz. The 6.2-inch Dynamic AMOLED 2X display has a 1080 x 2400 resolution and Gorilla Glass Victus. It supports GSM and CDMA networks without carrier apps.

Best for single-SIM users wanting 8K video

This phone suits buyers who need an unlocked US model for flexible carrier choice and international travel. The triple rear camera captures 8K video and 64 MP photos. Samsung DeX enables desktop-like productivity. Knox security protects business data. Buyers who need dual-SIM standby or expandable storage via microSD should look elsewhere.

128GB fixed storage with no card slot

The internal storage is 128GB with no microSD expansion slot. This capacity decides whether the device can hold your apps, media and offline files long-term. The USB Type-C 3.2 port supports OTG for external drives, but internal space cannot be increased. Verify that 128GB meets your needs before purchase.

How it compares

Measured against everything we stock in Unlocked Smartphones, at today’s prices. Recalculated every night.

Price $162.99
Typical for this category: the median of 2,409 items is $168.99.
Storage drive 128 GB
Typical for this category: the median of 1,888 items is 128 GB.

Specifications

Product
Brand nameSamsung
Product colorWhite
Processor
CPUOcta-core (1 × 2.84 GHz Kryo 680 & 3 × 2.42 GHz Kryo 680 & 4 × 1.8 GHz Kryo 680
CPU clock speed1 × 2.84 GHz Kryo 680 & 3 × 2.42 GHz Kryo 680 & 4 × 1.8 GHz Kryo 680
Memory
RAM capacity8 GB
Storage
Storage drive128 GB
Display
Main screen size6.2 in (15.7 cm)
Audio & video
Back camera(Triple) 64 MP + 12 MP + 12 MP
Connectivity
Connection optionsWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
Cellular bandsWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
Ports & slots
USB portsType-C 3.2, USB On-The-Go
Power
Battery typeNon-removable Li-Ion
Size & build
Overall dimensions5.97 × 2.8 × 0.31 in
In the box
In the boxSamsung Galaxy S21 5G, Wall Charger
Software
Operating systemAndroid
More details
Built-in sensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer

Questions about this item

Does the Galaxy S21 5G G991U need a nano-SIM card to activate service?

Yes, the unlocked phone accepts a standard nano-SIM from any compatible GSM or CDMA carrier for voice and data.

Can I keep using my existing USB-A chargers and cables with the USB Type-C 3.2 port?

You will need a USB-C to USB-A cable or adapter; the included wall charger has a USB-C output for the supplied cable.

How can I verify the 6.2 inch Dynamic AMOLED 2X display is operating at its 1080 x 2400 pixel resolution?

Open Settings, tap Display, then Screen resolution to confirm it shows FHD+ (1080 x 2400).

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