No, your OnePlus Nord N300 5G case won't fit the Galaxy S21 Ultra
The OnePlus Nord N300 5G (163.8×75.1mm) and Galaxy S21 Ultra (165.1×75.6mm) differ too much for cases to be compatible.
Does a OnePlus Nord N300 5G Case Fit Galaxy S21 Ultra?
Last verified: March 2026
No, a OnePlus Nord N300 5G case will not fit the Galaxy S21 Ultra. The phones have different dimensions that make cases incompatible.
Your OnePlus Nord N300 5G case will NOT fit the Galaxy S21 Ultra. Here's why:
- •Camera module layout is different — cutout won't align
| Spec | OnePlus Nord N300 5G | Galaxy S21 Ultra | Diff |
|---|---|---|---|
| Height | 163.8mm | 165.1mm | Galaxy S21 Ultra +1.3mm |
| Width | 75.1mm | 75.6mm | Galaxy S21 Ultra +0.5mm |
| Thickness | 7.99mm | 8.9mm | Galaxy S21 Ultra +0.9mm |
| Camera Layout | vertical-dual | vertical-quad | Different |
| Port | usb-c | usb-c | Same |
Button & Port Alignment
- •Button placement differs — cutouts may not align
Your OnePlus Nord N300 5G case won't fit the Galaxy S21 Ultra. Find the right case:
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Size Comparison
Wireless Charging & MagSafe
Only one phone supports wireless charging.
- The OnePlus Nord N300 5G does not support wireless charging. Only the Galaxy S21 Ultra can use a wireless charger.
OnePlus Nord N300 5G
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.
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Frequently Asked Questions
Are OnePlus Nord N300 5G and Galaxy S21 Ultra the same size?
OnePlus Nord N300 5G measures 163.8×75.1×7.99mm while Galaxy S21 Ultra measures 165.1×75.6×8.9mm. They are different sizes.
Can I use a OnePlus Nord N300 5G screen protector on Galaxy S21 Ultra?
Edge types differ (flat vs curved) — screen protector won't adhere properly.
What's different between OnePlus Nord N300 5G and Galaxy S21 Ultra dimensions?
The height differs by 1.3mm, the width by 0.5mm, 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 OnePlus Nord N300 5G, so cases are not interchangeable.
Will OnePlus Nord N300 5G 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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