OnePlus·phone
OnePlus 9
Based on 23 credible posts from Hacker News, YouTube & Bluesky. 77 filtered out as bot-like or off-topic.
Low confidenceFew owner reviews so far, so this score can still move a lot. How we score
Scored September 27, 2026
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Owner reviews
Overall owner mood
Owners are split: 35% of 23 reviews are positive, 39% negative, and the rest mixed or neutral. The most common complaint is software & ai (3 owners). Owners are divided on battery & charging.
What owners like
Nothing two or more owners agree on yet.
What owners complain about
Software & AI raised by 3 owners
“This is painfully obvious when looking at the history of OSs and software, and it's the obvious reason why "let the kids build their operating system ffs" should result in a reflexive "noooo..." from the greybeards.”
Price & value raised by 2 owners
Owners are split on
- Battery & charging 2 like it · 3 don't
Worth reading the reviews on these if they matter to you.
What owners talk about
- Battery & charging2 praise · 3 complain
- Software & AI0 praise · 3 complain
- Performance1 praise · 1 complain
- Price & value0 praise · 2 complain
- Camera1 praise · 1 complain
Built from the reviews themselves — every quote links to the owner who wrote it.
Every credible owner review, most detailed first. Bots, off-topic comments, and ones that say nothing about using it are left out.
Have had my OnePlus 9 4 years, seems it wasn't as good on launch, but got alot better over time, at this point im considering a battery replacement as health is like 84% now, but the fast charging makes it alot less noticeable, but kinda want that 6000 mah the OP 13R has. But the OP 9 has been the best lasting phone i have had, 4 years in and probably another 4 years easy i think. And i find i use the added close up zoom mode alot more than any other camara feature, just to read small serial codes better.
I've used LineageOS for many years (on One Plus 6T). [...] There's single thing missing: option to turn on flashlight while screen is off using the power button gesture. [...]
[...] Their capacities have largely dropped to the point that I need to charge them every ride or two. [...] They're not user-serviceable by design but I've been pondering cracking them open and having a go at swapping the batteries. [...]
Just a couple weeks after I got it for a steal on Amazon it was 180$ before tax brand new but just a few weeks later they made it 500$+ for like a couple months after that the price crashed back down to around 200$ but now you can only find pre owned 😢.
Is he now more concerned with protecting shareholder value? [...] It doesn't sound like he's concerned with waste. It sounds like it's a typical Carmack argument - distilled and hyper logical, and his conclusion is more to do with the pointlessness of it. [...] This is painfully obvious when looking at the history of OSs and software, and it's the obvious reason why "let the kids build their operating system ffs" should result in a reflexive "noooo..." from the greybeards. [...] Therefore unless the entire project is committed to truly moving crowds to new paradigms (good luck, literally billions have been lost here), just use the proven, faily high performance options that have widespread support. [...]
I still daily drive a Oneplus 7T; for $350 in 2020, it's served me incredibly well, barely any performance drop over the years. The battery has weakened ofc, the 2 day battery life has dropped to a measly 9 hours, but that's more than enough.
[...] If my server crashes (or manually killed by a root to test things on staging VM) and Alpine’s supervise-daemon restarts it, the startpre() function from the OpenRC service script won’t be called again. [...]
[...] I love my OnePlus 9 + Murena OS with its built-in tracker blocker.
I switched from Samsung Galaxy (first S, then S3) to OnePlus years back, and I've been a happy camper. I currently have an OnePlus 9, I've heard no so good (compared to previous) reviews of their newer models, but I'll cross that bridge when I get there. My current phone has been running great for multiple years, minimal bloatware, would recommend.
OTOH my OnePlus 5T is more than 9 year old now, and still perfectly usable (I changed the battery once).
I was functionally homeless for 9 years. Food stamps in America are inconvenient as they aren't accepted everywhere, come with strings attached as to purposes, are a way for others to other their users, require onerous paperwork and blasé treatment like a criminal, and are most often insufficient, especially in big cities and Southern states. Direct cash aid is little-to-nonexistent because of the cynical and discriminatory presumptions "people should work (even if they're disabled)" and "they'll just buy booze and drugs with it".
I hated my 2021 Edge+ with such a burning fury that I'm typing this on my old OnePlus 9 (with LineageOS, which I couldn't do on the moto). [...] The OnePlus 9 is supposedly the last good phone from them, so I'm thinking of using my wife's Pixel with a re-locked ROM once she upgrades. [...]
That delay in capturing photo is there in my OnePlus 7T as well after updating to Oxygen OS 11. So this is not OnePlus 9 series issue, this is Oxygen OS 11 issue. [...]
Hey @bsky.app There's no way for me to exit a video if I open it on the app with my phone. I have a OnePlus 9. [...] I have to double press the power button to open the camera to get out of the app and then close it.
I got a OnePlus 9 for this exact purpose and it was good, but not without issues. [...] That OnePlus 9 had some weird issues that eventually got resolved but it took a while. Important to differentiate between an OS that builds for a phone and one that actually works for a phone, but there's not usually a ton of reviews for the latter.
It's sad, but I'd estimate 99.9% of the use of the images I've taken is through google street view, not alternatives. It's what people reach for when they're curious about conditions somewhere.
never used an Apple device. I've been using a OnePlus 9 w/ LineageOS since '22. it takes some extra time and a teensy bit of interaction with a command line, but the bonus is that I expect to keep using it, barring unforeseen unfixable physical damage, for a long time to come
Weird, my OnePlus 9 only fast charges when connected to the original charger and not my laptop charger. Even when my laptop charger could output a higher wattage
iPhone 12 which is 86000 doesn't have a telephoto lens..so I don't think it's a bummer.. overall OnePlus 9 is great phone according to me
The 1990s were a lost decade for reusable space flight because instead of chasing incremental improvements to the Space Shuttle (an orbiter with reusable tiles that could be turned around in days, not months) or something like the Falcoln 9 or the fly-back version of Saturn V that O'Neill's students drew in 1979, it was all about SSTO. SSTO is just marginally possible, if it is possible you need exotic materials and engines and you're never going to get a good payload fraction and adding wings, horizontal takeoff, horizontal landing and such just makes it worse. The one good thing about it is that you get closer to "aircraft-like operations" because in principle you can inspect it, refill it, and relaunch it -- whereas something like the STS or Falcoln 9 or Starship will require stacking up multiple parts for each launch. My guess is aerospikes are making a comeback though because of interest in hypersonic weapons system. I could also see them being useful for the second stage of something like Starship which mostly operates at high altitudes but has to land at low altitudes. There are a lot of other technical problems, like the thermal management system, which really have to be solved before worrying about that optimization.
The cameras on the Pro versions used to be so good, then starting around one-plus 9 they really went downhill. I have photos in my archive from my OP8 Pro that look much better than those taken with the OP13. Coinciding with Samsung nerfing the Ultra (aside from the bloatware) - it's not looking like a great landscape for Android Phones.
the AXD301 ATM switch achieved nine nines over a nine-month period using Erlang and BEAM in 2002. That calculates out to 24 milliseconds of downtime. This is misleading. I had an old Dell computer in my garage hosting a php app that hit that level of uptime as well over a 9 month period. It was 100% so actually better. Those uptime numbers only hold water when spread over many thousands to millions of users where you’re at large enough scale that you’re actually dealing with a meaningful volume of hardware failures.
The claims, and the evidence
What the brand claims
No published claims on file for this product yet.
What owners report
“I've used LineageOS for many years (on One Plus 6T). [...] There's single thing missing: option to turn on flashlight while screen is off using the power button gesture. [...]”
“[...] Their capacities have largely dropped to the point that I need to charge them every ride or two. [...] They're not user-serviceable by design but I've been pondering cracking them open and having a go at swapping the batteries. [...]”
“Have had my OnePlus 9 4 years, seems it wasn't as good on launch, but got alot better over time, at this point im considering a battery replacement as health is like 84% now, but the fast charging makes it alot less noticeable, but kinda want that 6000 mah the OP 13R has. But the OP 9 has been the best lasting phone i have had, 4 years in and probably another 4 years easy i think. And i find i use the added close up zoom mode alot more than any other camara feature, just to read small serial codes better.”
after 4 yearsView on YouTube“Just a couple weeks after I got it for a steal on Amazon it was 180$ before tax brand new but just a few weeks later they made it 500$+ for like a couple months after that the price crashed back down to around 200$ but now you can only find pre owned 😢.”
Common OnePlus 9 problems
Problems most owners who mention them agree on, plus ones owners are split on.
- Software & AI3 owners report thisView on Hacker News
“If my server crashes (or manually killed by a root to test things on staging VM) and Alpine’s supervise-daemon restarts it, the startpre() function from the OpenRC service script won’t be called again.”
- Price & value2 owners report this
- Battery & chargingOwners split: 3 complain, 2 happyView on Bluesky
“Weird, my the product only fast charges when connected to the original charger and not my laptop charger.”