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Samsung Galaxy S21 Ultra 5G smartphone in Phantom Black finish, 6.8 inch display, quad rear camera array

SAMSUNG Refurbished

SAMSUNG SM-G998UZKAXAA-128GB-PHB-B Galaxy S21 Ultra 5G 128GB Phantom Black cell phones - unlocked

SKU CH-R1V6-KGJWR MPN SM-G998UZKAXAA-128GB-PHB-B

Unlocked Android smartphone with a 6.8-inch 120Hz Dynamic AMOLED 2X display, Snapdragon 888 processor, 12GB RAM, 128GB storage and a quad rear camera system offering 108MP wide.

  • Storage drive128 GB
  • Connection optionsYes
  • Operating systemAndroid 11
  • Form factorSmart Phones
  • Technology type5G
  • SIM typeNano SIM
  • Sharp 120 Hz Dynamic AMOLED 2X display for smooth visuals
  • 108 MP quad rear camera with dual optical zoom for versatile photography
  • Snapdragon 888 octa-core processor with 12 GB RAM for fast multitasking
  • 5G connectivity on an unlocked handset for carrier freedom
  • 40 MP front camera and 8K video capture for high-resolution content

Refurbished Galaxy S21 Ultra 5G

This refurbished Samsung Galaxy S21 Ultra 5G comes in Phantom Black with 128 GB of internal storage. It runs Android 11 on a Qualcomm Snapdragon 888 octa-core processor clocked at up to 2.84 GHz, supported by 12 GB of RAM. The device is fully unlocked for GSM and CDMA networks, making it ready for use with most carriers.

Best for photography enthusiasts

The quad rear camera system includes a 108 MP wide-angle lens with laser autofocus, two 10 MP telephoto lenses offering optical zoom at 3x and 10x, and a 12 MP ultra-wide lens. A 40 MP front-facing camera handles selfies and video calls. Buyers who want expandable storage via microSD should look elsewhere, as this model lacks a card slot.

6.8-inch Dynamic AMOLED 2X display

The main screen measures 6.8 inches full rectangle with a 3200 x 1440 Quad HD+ resolution and a 120 Hz refresh rate. It supports 16 million colours for vivid visuals. This display specification is the primary factor in deciding whether the handset meets your viewing and media requirements.

How it compares

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

Price $303.99
Pricier than about 70% of the 2,409 comparable items (median $168.99).
Storage drive 128 GB
Typical for this category: the median of 1,888 items is 128 GB.

Specifications

Product
Brand nameSamsung
Model nameGalaxy S21 Ultra
Part numberSM-G998UZKAXAA-128 GB-PHB-B
Product colorPhantom Black
Processor
Processor chipQualcomm Snapdragon 888
Core configurationOcta-core
CPU clock speed2.84 GHz, 2.4 GHz, 1.8 GHz
Memory
RAM capacity12 GB
Storage
Storage drive128 GB
Display
TouchscreenYes
Main screen size6.8 in Full Rectangle / 6.6 in Rounded Corners
Screen resolution3200 × 1440 (Quad HD+)
Primary display color16M
Display technologyDynamic AMOLED 2X, 120 Hz
Audio & video
Back cameraQuad: 108 MP + 12 MP + 10 MP + 10 MP
Wide Angle: 108 MP Laser AF (f/1.8)
Telephoto 1: 10 MP AF (f/2.4)
Telephoto 2: 10 MP AF (f/4.9)
Ultra Wide: 12 MP AF (f/2.2)
Zoom capabilityOptical Zoom at 3x and 10x, Digital Zoom up to 100x
Camera flashLED
Video recordingUHD 8K (7680 × 4320)@24fps
AutofocusYes
Selfie camera40 MP
SoundPlaying Format
MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA, DFF, DSF, APE
Connectivity
Connection optionsYes
Technology type5G
SIM typeNano SIM
Wi-Fi capability802.11 a/b/g/n/ac/ax 2.4G+5 GHz+6 GHz, HE160, MIMO, 1024-QAM, Wi-Fi Direct
BluetoothBluetooth v5.2
Extra connectivityNFC
Built-in GPSGPS, Glonass, Galileo
Extra radiosWi-Fi/GPS/NFC
Ports & slots
USB ports3.2 Gen 1 Type-C
Audio connectionUSB Type-C
Power
Battery capacity5,000 mAh
Talk durationUp to 37 h
Size & build
Form factorSmart Phones
Overall dimensions6.5 in × 2.98 in × 0.35 in
Product weight8.08 oz
Shipping weight1.81 kg
Package size229 × 152 × 76 mm
In the box
In the boxGalaxy S21 Ultra 5G
C to C Data Cable
Ejection Pin
Software
Operating systemAndroid 11
More details
Built-in sensorsAccelerometer, Barometer, Fingerprint Sensor, Gyro Sensor, Geomagnetic Sensor, Hall Sensor, Light Sensor, Proximity Sensor

Questions about this item

How long does the 128GB internal storage last when recording 8K video at 24fps?

The 128GB internal storage fills quickly with 8K video at 24fps, so plan to offload footage or use cloud backup during extended sessions.

Does the Snapdragon 888 throttle and make the chassis hot during all-day use?

The Snapdragon 888 can warm the glass back under sustained load; a case helps, but expect noticeable heat during long 8K recording or gaming.

Which SIM card size does the unlocked model accept?

It takes a single Nano SIM; have an active Nano SIM from your GSM or CDMA carrier ready before first boot.

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