No, your Galaxy A55 5G case won't fit the OnePlus 9
The Galaxy A55 5G (161.1×77.4mm) and OnePlus 9 (160×74.2mm) differ too much for cases to be compatible.
Does a Galaxy A55 5G Case Fit OnePlus 9?
Last verified: March 2026
No, a Galaxy A55 5G case will not fit the OnePlus 9. The phones have different dimensions that make cases incompatible.
Your Galaxy A55 5G case will NOT fit the OnePlus 9. Here's why:
- •Height differs by 1.1mm — case won't fit
- •Width differs by 3.2mm — case won't fit
- •Thickness differs by 0.5mm — may affect fit
- •New phone has alert slider — old case has no cutout for it
| Spec | Galaxy A55 5G | OnePlus 9 | Diff |
|---|---|---|---|
| Height | 161.1mm | 160mm | Galaxy A55 5G +1.1mm |
| Width | 77.4mm | 74.2mm | Galaxy A55 5G +3.2mm |
| Thickness | 8.2mm | 8.7mm | OnePlus 9 +0.5mm |
| Camera Layout | vertical-triple | vertical-triple | Same |
| Port | usb-c | usb-c | Same |
Button & Port Alignment
- •New phone has alert slider — old case has no cutout for it
Your Galaxy A55 5G case won't fit the OnePlus 9. Find the right case:
As an Amazon Associate, WillItSnap earns from qualifying purchases. This doesn't affect our compatibility data.
Get alerts when we add more phones
Size Comparison
Wireless Charging & MagSafe
Only one phone supports wireless charging.
- The Galaxy A55 5G does not support wireless charging. Only the OnePlus 9 can use a wireless charger.
Galaxy A55 5G
No wireless
OnePlus 9
Qi only
10W 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.
Related Guides
Related Compatibility Checks
Frequently Asked Questions
Are Galaxy A55 5G and OnePlus 9 the same size?
Galaxy A55 5G measures 161.1×77.4×8.2mm while OnePlus 9 measures 160×74.2×8.7mm. They are different sizes.
Can I use a Galaxy A55 5G screen protector on OnePlus 9?
Same screen size (6.55") but body width differs by 3.2mm — verify bezel alignment before buying.
What's different between Galaxy A55 5G and OnePlus 9 dimensions?
The height differs by 1.1mm, the width by 3.2mm, and thickness by 0.5mm.
Do I need a new case for OnePlus 9?
Yes, you'll need a new case. The OnePlus 9 has different dimensions than the Galaxy A55 5G, so cases are not interchangeable.
Will Galaxy A55 5G accessories work with OnePlus 9?
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.
Want to check another phone?
← Back to the compatibility checker