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Samsung Galaxy S21 Ultra 5G Phantom Black touchscreen smartphone 6.8 inch display

SAMSUNG

Samsung Galaxy S21 Ultra 5G G998U AT&T 128GB Phantom Black

SKU CH-WQ6F-JPEAD

Flagship Android smartphone with a 6.8 inch Dynamic AMOLED display, Snapdragon 888 processor, 12GB RAM, 128GB storage and 108MP camera

  • Storage drive128 GB
  • Operating systemAndroid
  • Form factorTouch Screen Phones
  • Main screen size6.8 in (17.3 cm)
  • RAM capacity12 GB
  • Product typeCell Phone
  • 108MP camera captures detailed stills from 8K video
  • 8-inch Dynamic AMOLED display adjusts 10Hz to 120Hz
  • Snapdragon 888 processor with 12GB RAM powers multitasking
  • 5000mAh battery supports extended daily use
  • 128GB storage holds apps, photos and files

Samsung Galaxy S21 Ultra 5G 128GB Phantom Black

This Samsung Galaxy S21 Ultra 5G is a factory-new smartphone with 128GB of internal storage and 12GB of RAM. It runs Android 12 with Samsung One UI on a Qualcomm Snapdragon 888 processor. The device features a 6.8-inch Dynamic AMOLED display with a 3200 x 1400 resolution and 120Hz adaptive refresh rate.

Ideal for AT&T subscribers needing 8K video capture

This handset suits buyers locked to the AT&T network who want a 108MP camera system capable of pulling 33MP stills from 8K footage. It is not for shoppers requiring expandable storage, a headphone jack, or compatibility with other carrier networks.

Single-SIM AT&T model G998U

The G998U model identifier confirms this unit operates exclusively on the AT&T network with a single physical SIM slot. Verify carrier compatibility before purchase as this variant will not activate on other networks.

How it compares

Measured against everything we stock in No-Contract Smartphones, at today’s prices. Recalculated every night.

Price $251.99
Pricier than about 68% of the 646 comparable items (median $180.49).
Storage drive 128 GB
Typical for this category: the median of 506 items is 128 GB.

Specifications

Product
Brand nameSamsung
Product lineGalaxy S21 Ultra 5G
Model nameG998U
Product typeCell Phone
Product colorBlack
Memory
RAM capacity12 GB
Storage
Storage drive128 GB
Display
TouchscreenYes
Main screen size6.8 in (17.3 cm)
Connectivity
Built-in GPSYes
Size & build
Form factorTouch Screen Phones
Software
Operating systemAndroid

Questions about this item

Will the 12 GB of RAM and Snapdragon 888 throttle during long gaming sessions?

The Snapdragon 888 with 12 GB RAM handles sustained loads well; thermal throttling only appears after extended heavy use as the 5000 mAh battery and vapour chamber manage heat.

How loud or hot does the phone get when the 120 Hz display runs all day?

The 6.8 inch Dynamic AMOLED scales from 10 Hz to 120 Hz automatically, keeping surface temperature and fanless noise negligible during typical all-day use.

Does the AT&T G998U work on other carriers without an unlocked SIM?

This model is locked to AT&T; it requires an active AT&T SIM or an official carrier unlock before it will accept other networks.

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