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Phantom Black Samsung Galaxy S21 Ultra smartphone with quad rear cameras

SAMSUNG

SAMSUNG SM-G998UZKAXAA Galaxy S21 Ultra 5G 128GB 12GB Phantom Black cell phones - unlocked

SKU CH-VWJ3-JY29K MPN SM-G998UZKAXAA

Unlocked 5G smartphone with 6.8-inch 120Hz Dynamic AMOLED 2X display, 108MP quad camera with 3x and 10x optical zoom, 8K video capture, 128GB storage and 12GB RAM

  • Storage drive128 GB
  • Connection optionsYes
  • Operating systemAndroid 11
  • Form factorSmart Phones
  • Technology type5G
  • Network bands2G GSM GSM850, GSM900, DCS1800, PCS1900 2G CDMA CDMA800, USP

RAM 12GB

Storage 128GB

Size S21 Ultra

  • 8" Dynamic AMOLED 2X display at 120Hz for smooth visuals
  • 108MP quad camera with 3x and 10x optical zoom captures distant detail
  • 8K video recording at 24fps delivers cinema-quality footage
  • 12GB RAM and 128GB storage power multitasking and apps
  • Unlocked 5G with broad band support works on major networks

Unlocked 5G flagship with 128 GB storage

The Samsung Galaxy S21 Ultra 5G ships unlocked with 128 GB of internal storage and 12 GB of RAM. Its 6.8-inch Dynamic AMOLED 2X panel runs at 120 Hz and a 3200 x 1440 Quad HD+ resolution. The quad rear camera array combines a 108 MP wide module with two 10 MP telephoto lenses and a 12 MP ultra-wide unit. 5G connectivity covers a broad set of FDD and TDD LTE bands plus sub-6 GHz NR.

Stepping up from single-lens or 4G-only handsets

Buyers moving from a phone with one rear camera gain 3x and 10x optical zoom plus up to 100x digital zoom. The jump from 4G to 5G adds access to the listed NR bands for faster data where coverage exists. 8K video capture at 24 fps replaces lower-resolution recording. The upgrade is worthwhile when zoom flexibility, high-resolution stills and 5G speeds are daily needs.

Ready to use with a nano SIM or eSIM

Insert a nano SIM into the single slot or activate the embedded SIM through your carrier; no tools are required. The device arrives new in box with no carrier locks. Common issues include forgetting to transfer eSIM profiles before wiping an old phone and overlooking the lack of a microSD slot for storage expansion.

How it compares

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

Price $909.99
Pricier than about 90% 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
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
Network bands2G GSM
GSM850, GSM900, DCS1800, PCS1900
2G CDMA
CDMA800, USPCS1900
3G UMTS
B1(2100), B2(1900), B4(AWS), B5(850), B8(900)
3G CDMA
BC0(800), BC1(1900), BC10(800)
4G FDD LTE
B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B14(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700), B30(2300), B66(AWS-3), B71(600)
4G TDD LTE
B38(2600), B39(1900), B40(2300), B41(2500), B46(5200), B48(3600)
SIM Slot Type
SIM 1 + Embedded SIM
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 weight0.45 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

Other versions of this model

5 more in the same range

Questions about this item

Does the phone accept a standard nano SIM or does it need a special tray?

It uses a nano SIM that fits into the combined SIM tray on the top edge.

What is the first step when setting up the device, and where do people get stuck?

Insert the nano SIM into the tray before powering on; skipping this step leaves the phone without mobile service.

Which component will need replacement after a few years of daily charging?

The built-in battery is not user-replaceable, so a service centre will need to swap it when capacity drops.

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