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Samsung Galaxy S21 5G smartphone in Phantom Gray finish

SAMSUNG

SAMSUNG Galaxy S21 5G G991U T-Mobile 128GB Phantom Gray

SKU CH-0FWR-2EKWG

A 6.2-inch Dynamic AMOLED smartphone with Snapdragon 888, triple camera and 128 GB storage, locked to T-Mobile

  • Storage drive128 GB
  • Connection optionsYes
  • Operating systemAndroid
  • Form factorSmart Phones
  • Technology typeT-Mobile
  • SIM configurationSingle SIM Card
  • Snapdragon 888 powers demanding apps and games
  • 2" Dynamic AMOLED with 120Hz adaptive refresh for smooth visuals
  • Triple camera: 64MP telephoto plus 12MP wide and ultra-wide
  • 8GB RAM and 128GB storage keep multitasking fast
  • 4000mAh battery with fast charging lasts through the day

Samsung Galaxy S21 5G T-Mobile 128GB

This Samsung Galaxy S21 5G model G991U is locked to the T-Mobile network and offers 128GB of internal storage with 8GB of RAM. It runs Android 12 with Samsung One UI and is powered by a Qualcomm Snapdragon 888 processor. The Phantom Gray handset is sold new and includes a UL approved power adapter and charging cable.

Carrier lock and storage limits

The device works only on the T-Mobile network, so buyers using other carriers cannot activate it. Internal storage is fixed at 128GB with no memory card slot mentioned, limiting space for apps, photos and video. The battery is a non-removable lithium ion unit rated at 4000mAh and supports fast charging via the included cable.

Snapdragon 888 performance tier

The Qualcomm Snapdragon 888 chipset determines whether this phone meets the performance needs of a given user. It drives the 6.2 inch Dynamic AMOLED display at 2400 x 1080 resolution with a 120Hz adaptive refresh rate and powers the triple camera system comprising 12MP, 64MP telephoto and 12MP ultra-wide sensors. Buyers who need a different processor tier should consider other models.

How it compares

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

Price $156.99
Cheaper than about 59% 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
Part numberG991U
Product typeCell Phone
Product colorGray
Memory
RAM capacity8 GB
Storage
Storage drive128 GB
Display
TouchscreenYes
Main screen size6.2 in (15.7 cm)
Audio & video
Camera flashYes
AutofocusYes
Selfie cameraYes
SoundYes
Connectivity
Connection optionsYes
Technology typeT-Mobile
SIM configurationSingle SIM Card
Wi-Fi capabilityYes
BluetoothYes
Messaging servicesSMS, MMS
Extra radiosWi-Fi
Power
Battery typeLithium Ion Battery
Charging optionsFast Charging
Size & build
Form factorSmart Phones
Software
Operating systemAndroid
Email supportEmail, Push Email

Questions about this item

Should I pick the 128 GB or 256 GB version of the Galaxy S21?

The 128 GB model fits most users who stream media and keep a moderate app library, while the 256 GB option adds breathing room for large game installs and offline video without needing cloud offload.

How does the Snapdragon 888 with 8 GB RAM perform in daily use?

The Snapdragon 888 paired with 8 GB RAM delivers snappy multitasking, fast app launches and smooth 120 Hz scrolling across the 6.2 inch Dynamic AMOLED display.

What 5G bands does the T-Mobile G991U support and what speeds can I expect?

The G991U is certified for T-Mobile 5G including low-band and mid-band spectrum, so real-world throughput depends on local tower density and network load rather than a fixed ceiling.

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