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Samsung Galaxy S21 5G smartphone in Phantom Violet finish, 6.2 inch display

SAMSUNG

SAMSUNG Galaxy S21 5G G991U 128GB Phantom Violet (T-Mobile)

SKU CH-Y9DH-4MAQA

A 6.2-inch Dynamic AMOLED phone with Snapdragon 888, triple cameras and 128GB storage

  • Storage drive128 GB
  • Connection optionsYes
  • Operating systemAndroid
  • Main screen size6.2 in (15.7 cm)
  • Battery typeLithium Ion Battery
  • Messaging servicesSMS, MMS, Email, Push Email, IM
  • Snapdragon 888 powers fast 5G performance
  • 2-inch Dynamic AMOLED display with 120Hz adaptive refresh
  • Triple camera system: 64MP telephoto plus 12MP ultra-wide and main sensors
  • 128GB storage with Android 12 and One UI
  • 4000mAh battery supports all-day use

Compact 5G Android Phone

The Samsung Galaxy S21 5G G991U is a 6.2-inch Android smartphone built for T-Mobile service. It ships new with 128GB of storage and a Snapdragon 888 processor. The Dynamic AMOLED display supports HDR content and is protected by Corning Gorilla Glass Victus.

Suits One-Handed Users, Not Storage-Hungry Buyers

The 6.2-inch form factor fits buyers who prefer a phone that is comfortable to hold and operate with one hand. The single 128GB capacity and lack of a microSD slot mean users who need more local space for media or large apps should look at models with higher built-in storage or expandable options.

Snapdragon 888 Decides 5G and Camera Speed

The Qualcomm Snapdragon 888 chipset governs 5G connectivity, on-device AI tasks and the processing speed behind the triple camera system. If your workflow relies on consistent 5G throughput or fast computational photography, this processor is the specification that determines whether the phone meets those demands.

How it compares

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

Price $157.99
Cheaper than about 58% 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 typeSim Card
Product colorViolet
Storage
Storage drive128 GB
Display
TouchscreenYes
Main screen size6.2 in (15.7 cm)
Audio & video
Camera flashYes
Selfie cameraYes
Connectivity
Connection optionsYes
BluetoothYes
Messaging servicesSMS, MMS, Email, Push Email, IM
Extra radiosWi-Fi/GPS/NFC
Power
Battery typeLithium Ion Battery
Software
Operating systemAndroid
Email supportEmail, Push Email

Questions about this item

What size SIM card does the G991U require?

The phone uses a nano-SIM tray; insert the card with the gold contacts facing down until it clicks.

Which step do people miss when moving data to this Android 12 phone?

After the cable connection, you must tap "Allow" on the old phone's trust prompt before the transfer starts.

What battery service does the 4000 mAh cell need after a couple of years?

Capacity fades with age; a Samsung-authorised service centre can swap the sealed lithium-ion pack when run-time becomes too short.

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