Between the CMF Phone 1 and OnePlus Open 2, the CMF Phone 1 comes out ahead in weight, while the OnePlus Open 2 wins on antutu and wired charging. Overall, the CMF Phone 1 scores 61.4 and the OnePlus Open 2 scores 74.5 on our Mars Score.
Which should you buy?
The OnePlus Open 2 is the clear pick on raw spec strength, leading by 13.1 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 CMF Phone 1 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight.
Pick the OnePlus Open 2 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 Open 2 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Nothing - CMF Phone 1 wins
- ▲Weight — 42.00 g less. 197 vs 239.
Why OnePlus Open 2 wins
- ▲AnTuTu — 378.57% more. 2680000 vs 560000.
- ▲Wired charging — 142.42% more. 80 W vs 33 W.
- ▲RAM — 100.00% more. 16 GB vs 8 GB.
- ▲Front camera — 100.00% more. 32 MP vs 16 MP.
- ▲Screen size — 19.94% more. 8.0 " vs 6.67 ".
- ▲Battery capacity — 14.00% more. 5700 mAh vs 5000 mAh.
- ▲Pixel density — 1.77% more. 402 ppi vs 395 ppi.
- ▲Has Optical image stabilization.
Spec comparison
Design
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| Weight | 197 glead | 239 g |
| Thickness | 8.2 mmlead | 11.7 mm |
| Water resistanceⓘ | IP52 | IP68lead |
| Form factor | bar | foldable_booklead |
Display
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| Screen sizeⓘ | 6.67 " | 8.0 "lead |
| Pixel densityⓘ | 395 ppi | 402 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2000 nits | 4500 nitslead |
Performance
Cameras
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 16 MP | 32 MPlead |
| Optical image stabilizationⓘ | false | truelead |
Battery
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| Battery capacity | 5000 mAh | 5700 mAhlead |
| Wired chargingⓘ | 33 W | 80 Wlead |
| Wireless chargingⓘ | 0 W | 50 Wlead |
Connectivity
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | truelead | false |
Operating System
| Spec | Nothing - CMF Phone 1 | OnePlus Open 2 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 4 yearslead |
Frequently asked
Which has better battery, CMF Phone 1 or OnePlus Open 2?+
OnePlus Open 2 has 14.0% more battery — 5000 mAh vs 5700 mAh.
Which is lighter, CMF Phone 1 or OnePlus Open 2?+
CMF Phone 1 is 42g lighter — 197g vs 239g.
Is CMF Phone 1 waterproof?+
CMF Phone 1 has an IP52 rating.
Does OnePlus Open 2 support 5G?+
Yes, OnePlus Open 2 supports 5G.
Which has more RAM, CMF Phone 1 or OnePlus Open 2?+
OnePlus Open 2 offers 16GB of RAM.
Which has a better camera, CMF Phone 1 or OnePlus Open 2?+
OnePlus Open 2 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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