eSIMFox

Does Samsung Galaxy S21 Ultra 5G Support eSIM?

Yes — most Samsung Galaxy S21 Ultra 5G models support eSIM, but some models or regional variants do not.

Manufacturer verifiedReviewed: August 22, 2026

Based on official manufacturer documentation · How we verify compatibility →

Check if your Samsung Galaxy S21 Ultra 5G is eSIM compatible. Ensure a smooth transition to digital SIM cards with our step-by-step guide.

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Samsung Galaxy S21 Ultra 5G
Verified facts

Samsung Galaxy S21 Ultra 5G eSIM compatibility

Everything below comes from official Samsung documentation — checked, dated and linked, so you don't have to take our word for it.

Samsung Galaxy S21 Ultra 5G compatibility facts

Manufacturer verified
  • eSIMYes
  • Physical SIM + eSIMYes

Last reviewed: August 22, 2026Source: Samsung documentation

* See regional & model exceptions

Regional & model exceptions

  • Hong Kong (SM-G9980)SM-G9980
    • eSIMNo
    • Dual eSIMNo
    • Physical SIM + eSIMNo
  • China mainland
    • eSIMNo
    • Dual eSIMNo
    • Physical SIM + eSIMNo

Bought your device outside these regions? Your model supports eSIM.

Official Samsung sources & verification

Facts on this page were verified against official Samsung documentation on August 22, 2026. · Technically reviewed by Adil Z · How we verify compatibility →

eSIM Device Checker:

How to check eSIM support on your Samsung Galaxy S21 Ultra 5G

Quickly check if your Samsung Galaxy S21 Ultra 5G can use eSIM to enjoy its many benefits.

Check your Samsung Galaxy S21 Ultra 5G

Check for “Add eSIM” in Settings

  • Open Settings
  • Tap Cellular or Mobile Data
  • Look for “Add eSIM”

Check your Samsung Galaxy S21 Ultra 5G model number

  • If the option is missing, check your model number

If your model number is SM-G9980, refer to the regional exceptions above.

Check for carrier or network restrictions

  • Open Settings on your Samsung device.
  • Tap Connections.
  • Tap SIM card manager
  • Look for the section Carrier Lock or Network Provider Lock.

If Add eSIM is available, your device is likely unlocked for eSIM.

Get a eSIM for your Samsung Galaxy S21 Ultra 5G Now

*The following Samsung Galaxy devices DO NOT have eSIM capability:

  • All Galaxy devices originating from China, Hong Kong, Taiwan and Macao.
  • All Galaxy FE “Fan Edition” models, except the Galaxy S23 FE.
  • USA models of the Galaxy S20, S21*, and Note 20 Ultra.
  • *Most Samsung Galaxy devices purchased in South Korea do not support eSIMs, except for the Galaxy S24, S23, Z Fold 5, Z Fold 4, Z Flip 5, Z Flip 4, and A54 5G variants.
  • *Galaxy A54 5G eSIM availability may vary depending on country/region and carrier. Please contact your carrier or device manufacturer to confirm that your Galaxy A54 5G device is eSIM-capable.
  • *Galaxy S21 series devices (with the exception of FE models) from Canada and the USA may have eSIM capability as long as the One UI 4 update is installed. Please get in touch with your carrier or device manufacturer to confirm that your Samsung device is eSIM-capable.

Samsung Galaxy S21 Ultra 5G eSIM — frequently asked questions

Find answers to common questions about eSIM activation, compatibility, top-ups, and more.

Mostly yes. Nearly all Samsung Galaxy S21 Ultra 5G units support eSIM, but certain models or regional variants do not — the exceptions are listed on this page.

More

Other eSIM-compatible Samsung models

The Samsung models closest to the Samsung Galaxy S21 Ultra 5G — each with its own verified compatibility page.

eSIM compatible with Samsung*

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* Carrier- and country-specific restrictions may apply. Device must be carrier-unlocked.