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Samsung Galaxy S23 Ultra Phantom Black glass-and-aluminium slab with embedded S Pen

SAMSUNG

SAMSUNG Galaxy S23 Ultra 256GB Phantom Black 8GB RAM AT&T Locked Single SIM Excellent Grade A prepaid

SKU CH-FZMD-ART0J

A 6.8-inch 120Hz Dynamic AMOLED 2X smartphone with 256GB storage, 8GB RAM, 200MP quad camera, built-in S Pen and IP68 rating, locked to AT&T

  • Storage drive256 GB
  • RAM capacity8 GB
  • Product colorPhantom Black
  • Pristine screen with no scratches on 6.8 Dynamic AMOLED 2X
  • Like New Grade A condition with minimal body scuffs
  • 256GB storage for apps and 8GB RAM for multitasking
  • Embedded S Pen for precise productivity and creativity
  • 200MP quad camera system captures detailed photos and 10x zoom

Galaxy S23 Ultra 256GB AT&T Locked

This Samsung Galaxy S23 Ultra arrives new in Excellent Grade A condition with Phantom Black finish. It offers 256GB storage and 8GB RAM on AT&T's locked network. The 6.8 inch Dynamic AMOLED 2X display runs at 120Hz with HDR10+ support and peak brightness of 1750 nits. An integrated S Pen adds Bluetooth-enabled stylus control for notes and remote actions.

Best for AT&T subscribers wanting a flagship

Buyers who need an unlocked device for other carriers should look elsewhere. The single SIM slot (Nano-SIM or eSIM) limits dual-line use. Users requiring more than 256GB onboard storage have no expansion option. Anyone preferring a smaller handset will find the 163.4 x 78.1 x 8.9 mm frame large.

256GB handles extensive apps.

Heavy 8K video recording or large offline media libraries can fill the fixed storage quickly. The 8GB RAM keeps multitasking smooth for typical flagship workloads. Battery capacity of 5000mAh supports full-day use with 45W charging speeds. Gorilla Glass Victus 2 on front and back resists daily scratches and drops.

How it compares

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

Price $299.99
Pricier than about 73% of the 646 comparable items (median $180.49).
Storage drive 256 GB
Higher than about 80% of the 506 comparable items (median 128 GB).

Specifications

Product
Product colorPhantom Black
Memory
RAM capacity8 GB
Storage
Storage drive256 GB

Questions about this item

Does the AT&T-locked S23 Ultra need an active AT&T SIM or eSIM to complete initial setup and receive calls?

Yes. The unit is locked to AT&T, so an AT&T Nano-SIM or AT&T eSIM profile must be active before the phone can connect to the network for calls and data.

Will my existing Nano-SIM card work in the single-SIM tray, or do I need to switch to eSIM?

The tray accepts one Nano-SIM; if your current card is Nano size it fits directly, otherwise you can activate an eSIM profile with AT&T instead of using a physical card.

How can I verify the 120 Hz Dynamic AMOLED 2X panel is running at its full refresh rate after setup?

Open Settings → Display → Motion smoothness and confirm "Adaptive 120Hz" is selected; then enable Developer options → Show refresh rate to see a live 120 Hz overlay on screen.

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