Between the Phone (3a) and OnePlus 13R, the Phone (3a) comes out ahead in front camera and weight, while the OnePlus 13R wins on antutu and wired charging. Overall, the Phone (3a) scores 62.5 and the OnePlus 13R scores 71.3 on our Mars Score.
Which should you buy?
The OnePlus 13R is the clear pick on raw spec strength, leading by 8.8 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Phone (3a) if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are front camera, weight.
Pick the OnePlus 13R if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are antutu, wired charging, ram, among others.
Both ship with comparable main camera, refresh rate, 5g support, so those specs don't separate the two — focus on the differences below.
Bottom line: the OnePlus 13R is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Nothing - Phone (3a) wins
- ▲Front camera — 100.00% more. 32 MP vs 16 MP.
- ▲Weight — 5.00 g less. 201 vs 206.
Why OnePlus 13R wins
- ▲AnTuTu — 153.66% more. 2080000 vs 820000.
- ▲Wired charging — 60.00% more. 80 W vs 50 W.
- ▲RAM — 50.00% more. 12 GB vs 8 GB.
- ▲Battery capacity — 20.00% more. 6000 mAh vs 5000 mAh.
- ▲Pixel density — 16.28% more. 450 ppi vs 387 ppi.
- ▲Water resistance: IP65 (vs IP64).
- ▲Promised OS updates: 4 (vs 3).
- ▲Screen size — 0.15% more. 6.78 " vs 6.77 ".
Spec comparison
Design
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| Weight | 201 glead | 206 g |
| Thickness | 8.4 mm | 8.0 mmlead |
| Water resistanceⓘ | IP64 | IP65lead |
| Form factor | bar | bar |
Display
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| Screen sizeⓘ | 6.77 " | 6.78 "lead |
| Pixel densityⓘ | 387 ppi | 450 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 3000 nits | 4500 nitslead |
Performance
Cameras
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MPlead | 16 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| Battery capacity | 5000 mAh | 6000 mAhlead |
| Wired chargingⓘ | 50 W | 80 Wlead |
| Wireless chargingⓘ | 0 W | 0 W |
Connectivity
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Nothing - Phone (3a) | OnePlus 13R |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 4 yearslead |
Frequently asked
Which has better battery, Phone (3a) or OnePlus 13R?+
OnePlus 13R has 20.0% more battery — 5000 mAh vs 6000 mAh.
Which is lighter, Phone (3a) or OnePlus 13R?+
Phone (3a) is 5g lighter — 201g vs 206g.
Is Phone (3a) waterproof?+
Phone (3a) has an IP64 rating.
Does OnePlus 13R support 5G?+
Yes, OnePlus 13R supports 5G.
Which has more RAM, Phone (3a) or OnePlus 13R?+
OnePlus 13R offers 12GB of RAM.
Which has a better camera, Phone (3a) or OnePlus 13R?+
OnePlus 13R has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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