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No, your Oppo A79 case won't fit the Galaxy S21 Ultra

The Oppo A79 (165.6×76mm) and Galaxy S21 Ultra (165.1×75.6mm) differ too much for cases to be compatible.

Does a Oppo A79 Case Fit Galaxy S21 Ultra?

Q: What's different between Oppo A79 and Galaxy S21 Ultra dimensions?

The Oppo A79 is 165.6mm tall and 76mm wide, while the Galaxy S21 Ultra is 165.1mm tall and 75.6mm wide. Body dimensions are nearly identical, but the camera cutout is incompatible (vertical-dual vs vertical-quad)

Last verified: March 2026

No, a Oppo A79 case will not fit the Galaxy S21 Ultra. The phones have different dimensions that make cases incompatible.

5Won't Fit

Your Oppo A79 case will NOT fit the Galaxy S21 Ultra. Here's why:

•Body dimensions are nearly identical, but the camera cutout is incompatible (vertical-dual vs vertical-quad)

Spec	Oppo A79	Galaxy S21 Ultra	Diff
Height	165.6mm	165.1mm	Oppo A79 +0.5mm
Width	76mm	75.6mm	Oppo A79 +0.4mm
Thickness	7.99mm	8.9mm	Galaxy S21 Ultra +0.9mm
Camera Layout	vertical-dual	vertical-quad	Different
Port	usb-c	usb-c	Same

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Your Oppo A79 case won't fit the Galaxy S21 Ultra. Find the right case:

🛡️Best Galaxy S21 Ultra Cases→🔒Rugged Cases for Galaxy S21 Ultra→✨Clear Cases for Galaxy S21 Ultra→👛Wallet Cases for Galaxy S21 Ultra→

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Size Comparison

Oppo A79Galaxy S21 Ultra

Wireless Charging & MagSafe

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Only one phone supports wireless charging.

The Oppo A79 does not support wireless charging. Only the Galaxy S21 Ultra can use a wireless charger.

Oppo A79

No wireless

Galaxy S21 Ultra

Qi only

15W max

MagSafe cases are NOT cross-compatible between these devices — the case body is shaped to each phone, even though the internal magnet ring may be the same.

See all cases for Galaxy S21 Ultra →

🎁 Buying a case as a gift? Use our Gift Finder →⚡ Need a charger for your Galaxy S21 Ultra? Check charger compatibility →

Does the screen protector fit? Oppo A79 → Galaxy S21 Ultra Compare sizes: Oppo A79 vs Galaxy S21 Ultra

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Frequently Asked Questions

Are Oppo A79 and Galaxy S21 Ultra the same size?

Oppo A79 measures 165.6×76×7.99mm while Galaxy S21 Ultra measures 165.1×75.6×8.9mm. They are different sizes.

Can I use a Oppo A79 screen protector on Galaxy S21 Ultra?

Edge types differ (flat vs curved) — screen protector won't adhere properly.

What's different between Oppo A79 and Galaxy S21 Ultra dimensions?

The height differs by 0.5mm, the width by 0.4mm, and thickness by 0.9mm. The camera module layout is also different.

Do I need a new case for Galaxy S21 Ultra?

Yes, you'll need a new case. The Galaxy S21 Ultra has different dimensions than the Oppo A79, so cases are not interchangeable.

Will Oppo A79 accessories work with Galaxy S21 Ultra?

Chargers and cables are compatible since both phones use the same usb-c port. Cases and screen protectors depend on exact dimensions — check our compatibility results above.

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