Update: With the upgrade to Android 15 (12/28), the battery consumes more power compared to when it was running the previous version. I'm not entirely sure if it's a software issue or skin (there's a difference between them), but it requires charging at least twice a day. I also apologize for the previous review written in English. It is normally written in Greek, but since I have English as my primary language, the software anglicized the review. Briefly, I will mention what I liked about the phone and what I didn't.
Pros: Ridiculously fast processor, ridiculously fast charging (20-100% in 25-30 minutes), incredible screen in terms of colors and resolution, etc., the camera hardware along with GCam is much more color-accurate than with the stock app, and the phone's OS is not only stable but also very smooth in tasks and multitasking.
Cons: As I mentioned earlier, with the upgrade to Android 15, it needs charging at least twice a day since it drains a lot of battery, and the peak brightness of the device for its category and price is extremely low (it should be noted that the phone was not purchased from a Greek store or chain but from China, and therefore I didn't pay as much as it costs in Greece, but around 500-550 euros)

I have had it for about 1 year and 2 months, which is a sufficient period to evaluate its performance, durability, etc. I will say it in two words: mediocre phone. Within 6 months, the entire back side cracked in very specific areas, just like hundreds of others that I researched (search online and even in the oneplus app, and you will find the corresponding threads) in exactly the same spots below the camera, cracking the entire surface. It should be noted that this happened without any drops, and I always used a Spigen case and a screen protector. Mind you, I take extra care of the things I use non-stop. Many other users had the same experience, and they all say it is a manufacturing issue with many complaints about the company, which does not take responsibility. For the amount of money this phone costs, I think the build quality is poor. Nevertheless, it is fast, takes decent photos without anything extraordinary, and the multitasking is satisfactory. Additionally, the battery life is exceptional with very fast charging! It is not worth its price, and I regret the purchase I made, as with the same amount of money, I could have gone for other well-known companies that ultimately have more satisfactory and powerful products. I will not choose it again.

FAN-TAS-TIC phone (I have the version with 16GB RAM/256GB STORAGE)! Bought on BLACK FRIDAY for €750, it is an excellent phone with very good build quality that does everything it promises... Its highlights are 5...
a) Perfect screen in terms of colors, clarity, responsiveness, and brightness
b) Incredibly smooth experience on oxygen os v.13.1 and v.14... I haven't noticed any glitches or bugs no matter how many apps I have opened.... And the connectivity has been flawless so far
c) Premium appearance and feel... polished dark chrome metal frame is a sight to behold, at least in the titan black version, and the processed black glass back gives a very special feeling... metal buttons on the side are very high quality. No comparison with nord 3 (which is excellent vfm) and cheaper phones... I won't hide that I intended to go for the nord 3 but I spent the extra money because the phone looked and felt much more expensive in hand
d) The battery... lasts comfortably for 1 day and really charges like lightning even with 3rd party chargers of 30-33w, much better than expected... A big note here... don't be alarmed if at first it seems like the battery drains very quickly... it needs 2-3 full charging cycles to work properly. Wireless charging has never bothered me, so I don't consider it a disadvantage
e) Fantastic speakers, I simply have no words for the crystal clear sound and how well the stereo and srs work.... Now I prefer watching movies on my phone rather than on the computer, due to the incredible image and sound it offers.....

It is definitely not cheap, but I believe it is worth it as an investment... If you want a phone only as a tool and don't care about appearance-feel, then the Nord 3 is the only way to go. The oneplus 11, however, is fully loaded with a noticeable difference in performance from phones costing €300-500, but not enough to justify the €850-900 it is usually sold for... it depends on how much one values or needs a more premium feel and how much they price it. If the Nord 3 costs €450-550, the sweet spot for the oneplus 11 should be at €650-700 at most. I'm not even talking about phones costing €1500 and €2000... I consider them just a display of vanity, the difference in hardware/software is very small and the monetary difference is huge.... If you are a professional photographer... you will go get a professional camera... not a phone... The average user does not need such phones and with phones like the oneplus 11, they won't seek them either, unless they have €2000 to spare and want to say they carry the most expensive phone

Update 25/12/2023: what I mentioned above still holds true and no green line or other anomaly has appeared on the screen (thank God). I just want to clarify that a little issue that has been reported with the automatic brightness adjustment, I confirm that it is true but it doesn't happen often and is easily fixed. In cases where it darkens suddenly, e.g., entering a tunnel... the brightness on the slider automatically goes to the lowest possible... if we can't wait a few seconds for it to auto-adjust... then we can do 2 quick taps on the button that activates the automatic brightness adjustment and it recalibrates to the correct level. The other solution is, without disabling the automatic brightness, to play with the slider manually adjusting the brightness to the desired level.
Update 16/1/2024
After the new update, the phone is like butter, it responds just with thought... before you even touch it properly... the battery management has improved even though I have a smartwatch permanently connected with all sensors active... and some apps that I use and were not fully optimized, now run like water... I absolutely love the phone more and more as time goes by!
Update 19/5/2024
Everything is perfect so far, the only slightly concerning thing is that the battery health now reports 99% for a few weeks, but the phone is constantly connected to 2 and 3 devices via Bluetooth and there is heavy usage in Skype calls - Teams, video playback, and several apps running in the background, so it's somewhat logical... especially when we are talking about fast charging of 100w... The above has not affected the performance of the device or the duration of operation... as far as I can perceive at least, nor the duration/performance of the charging.

Update 12/11/2024 ...the battery health percentage has dropped to 96%... it hasn't affected me in my daily life and the charging is very fast so... I will never need to worry... but I must mention it.

I bought it a few days ago for 899€, the phone is unbeatable in terms of speed. There's not much to say, especially when it comes to Snapdragon processors of the latest generation. The screen is amazing, especially when you choose the mode with 120hz for maximum enjoyment. The cameras are quite good, I would even say they outshine flagship devices from other companies.

However, I will give it 4 out of 5 stars because it still needs updates from the company. There are some glitches that need to be fixed, although they are minor. (The always on display glitches every time you lock the device, and you can notice it even more when the 120hz mode is enabled.)

The brightness only acts up when I try to watch HDR videos on YouTube. Every time I play a video, the brightness simply decreases for no reason. It's not because of the automatic brightness setting, and I don't have any settings on the phone that would cause this function on its own. I realized this when I went full screen with the video on YouTube and activated the auto rotate feature, which caused the video to glitch and not provide full brightness. On the other hand, when I played a regular 4K video, there was no issue. The problem seems to be with HDR. I have read on various forums that other owners of this device have experienced the same issue. These are minor issues, but I believe that if the company fixes them in the next updates, it will be a big yes for anyone considering this device.

Very, very good job from OnePlus, especially when you have so many years for updates and Super improvements in front of you. The OnePlus 11 is a beautiful mobile phone with a suitable weight. Its screen resolution is at the top of 2023 as the number one alongside Sony's flagship. The speech is extremely high-quality, as well as the open listening. The signal is incredibly strong and always stable. With the SD/8 Gen 2, commonly known as the best processor in the world, it doesn't lag anywhere at all. If some people without technological knowledge tell you nonsense, just ignore them. If it gets stuck on PC or smartphones, it's a matter of application and NOT the processor, especially when we're talking about Snapdragon. The sound is unparalleled in quality and incredibly powerful in clean files. The performance of the cameras is at a very high level, but I won't say they are the number one in the market. Nevertheless, you will see very strong results. The battery is very good and the charging is lightning-fast. I would also like to emphasize that the device is officially IP 64, in other words, waterproof, I'm telling you this from my personal experience when it fell into water. You could also watch a video on YouTube titled OnePlus 11 Water Test. I bought it with a receipt in the 16/256 version for 657.90 euros, but believe me, even if I didn't have this help, I would still give the 899 euros for this beast because it easily competes with devices that cost 1300+ euros. The rating is not accidental, not only here but also on global sites.

Update 24/10/2023.
Anyone who believes it's worth spending 900€ on the oneplus, go ahead.

Big disappointment.
Bought for 900€ and the back is made of cheap plastic. Even the 200€ and 300€ phones don't have this kind of plastic. It's a joke. I also read someone here saying that the back is made of glass, not plastic, and I thought maybe all models are glass and some people just thought it was plastic that looks like glass. But in the end, it's cheap Chinese plastic that looks 1000% like plastic.
The fingerprint sensor is a complete joke. My Samsung Note 9 (thankfully) is 5 times faster and more responsive.
And it also froze within the first few minutes of use. I wonder why it has 5/5 stars ???

Update 29-09-2023
In this "hyper-mobile" with endless RAM and a super processor, the messenger app crashed a few days after purchase. How logical...
On the back, where the Chinese plastic meets the camera, there is a gap where clothing fibers get stuck and dust enters with unknown destination.
Of course, it's 0% waterproof because with such a gap in the back cover, any hint of moisture will get inside. I will also upload photos.
Such cheap construction for so much money. What a waste of money, really. Only Samsung!!!
Photos of the back of the super mobile that cost me 900€. Look at the photos to see the quality of construction we're talking about.
It does charge extremely fast indeed!

I wanted to wait three to four months to work everything out on the device before giving my evaluation. So, I will honestly say that this time OnePlus has created a beast. Its aesthetics are at a very high level, in other words, it is a beautiful smartphone. The build quality is excellent, made from premium materials, and the measured fake reviews with photos of the phone from Google, etc., are not justified. The screen is in a league of its own and it couldn't be any different when we're talking about a resolution of 3216 x 1440 pixels, with a refresh rate of 120Hz, 551 ppi, and of course, 1300 nits. The scrolling is smooth as velvet and the fingerprint scanner is lightning fast. I'm telling you straight up, anyone who says otherwise is simply fooling you. The call quality is excellent because the signal bars are always at maximum, something I have never seen on a phone before. As for the sound, after an update, it is truly remarkable. I never expected that OnePlus, a company without a background in music like Sony, for example, would have such sound quality. The battery is highly commendable. There is no wireless charging, but the regular charging is really fast. In just 24 minutes, you go from 0% to maximum. The camera capabilities are very strong, especially for close-up photos, but I believe an update for night shots in complete darkness is necessary. The zoom is not the best we've seen on smartphones, but it is decent. The front camera is not the phone's strong point. It's not disappointing, of course, don't expect that, but it's not impressive either. I consider this device to be one of the top three of 2023, and based on its cost, I highly recommend it.

Where to expect it, so many positive comments have not mentioned how many problems it has. Yes, okay, the phone does indeed have a good screen, camera, and speakers, and overall the hardware is very good. But what about the software? Why doesn't anyone comment on it, with so many missing features and problems? Let's start then. You can't select an audio output device when playing sound from an application other than music apps. You can't set notifications to vibrate while the ringtone plays with sound. You can't skip songs with another Bluetooth device, like headphones, while music is playing from a speaker. The battery lasts exactly one day with moderate use (I expected much more). The phone doesn't ask for an unlock code to turn off data or activate airplane mode, so forget about finding it in case of theft. The camera is good, but only up to 4K 30fps, if you go higher it deteriorates a lot. Photos and videos come out well only in AI mode, the pro mode is terrible, with very poor image preview, you don't know how the photo will turn out at night until you take it. The contacts and clock apps are very user-unfriendly with few options. There is no touch sensitivity adjustment in case a screen protector is applied, except for the factory one. There is no setting for smart charging, it only slows it down from a certain point at night and tells you it will be 100% at 6 am without being able to change it, only to turn it off. Coming from the LG G8s (an incredible phone that anyone who hasn't held it in their hands wouldn't know), I was completely disappointed. I'm selling it to get the S23+ even if it has worse charging and RAM, at least the One UI is incredible. That's all I had to say, I hope I didn't miss anything

I am not one of those people who are obsessed with a company, nor do I bother to claim that my smartphone is better than yours and engage in immature nonsense. However, I am completely objective because I want the world to be able to get something very powerful at an affordable price because money is scarce nowadays. OnePlus has achieved this and we must respect it honestly. The OnePlus 11 16/256 is in many ways much stronger than the classic well-known Brand Name devices that cost 1400 euros or 1600 euros and so on. Its size is synonymous with slimness and lightweight. Its screen is something else, with a resolution that, if I'm not mistaken, is the highest on the market right now. The colors are very beautiful without any fake exaggerations. Its fingerprint sensor is incredibly fast without any glitches. As known, it is dual, but it does not offer the possibility of memory expansion. However, its software is so well-designed that with all your applications, it leaves you with a clean 231GB of free space, which I personally find highly satisfactory. Its scrolling is smooth and perfectly stable. Its speed is lightning-fast, thanks to the guarantee of the best processor in the world, the notorious SD 8.2-2Gen. I was extremely impressed by the clarity and quality of the sound during normal use and in speakerphone mode. The sound quality exceeded the limit of perfection, and I was truly amazed by the company's excellent work on music. Its battery life is very good and will last you a day and a half with regular typical use. If you are a gamer or constantly use your phone, of course, it will drain faster, which is logical. Although it does not have wireless charging, something I never used, the device will charge from 0% to 100% in just 23 minutes. In the camera department, after the software update I received three days ago, the improvement was such that it surpassed the competition. The front camera still works at 1080, which I believe the company will undoubtedly change with the appropriate update, as it did with the rear lenses. The OnePlus 11 is a powerful flagship that, believe me, is not only affordable but also very low in price compared to today's prices. You understand that 899 euros, which is the official cost, is different from 1400 euros or 1600 euros for devices that are essentially inferior. I do not like numerical marketing at all, such as 200 megapixels or x100 Zoom, etc., because I know they do not correspond to reality. OnePlus includes Zoom, which is smaller but crystal clear. It did not include x100 Zoom, which completely distorts the photo after x20, resulting in a funny final result. I highly recommend the OnePlus flagship without reservation because it is simply the only way to go due to its incredible capabilities and cost.

OnePlus has truly created a beast that has greatly challenged the brand names of other companies. They tried to rely on their superiority in photography performance, but OnePlus kept them in check with the ready software update 13.1, making the game much more interesting. The OnePlus 11 is made of high-quality aluminum and there is no trace of plastic on it, as some unknowledgeable people falsely claim. In fact, its screen is protected by Gorilla Glass Victus and its back is made entirely of Gorilla Glass 5, which has a specific texture. The screen is amazing and has the highest resolution on the market. The PPI is at a very good level, specifically 525, which is higher than other flagships. Its scrolling is flawless, so you won't lose track of the apps you're searching for. Its speed has the steel stamp of the infamous Snapdragon 8 Gen2 processor, specifically the well-known N1 processor that is on the market. On the back, in the camera module, there is a millimeter of openness for cooling, and some people imagine that dust enters from there, without knowing that there is specific protection for it. They say it and believe it, and that's a good thing. The call quality and the speakerphone are diamonds. The sound is undoubtedly the best on a smartphone, and you will understand it when you hear it. The battery showed its greatness with heavy usage, and the fast charging is lightning fast. To understand exactly what I mean, it is literally three times faster than any device that costs 1400 euros. With this in mind, why would there be 10W or 20W wireless charging to deceive people with marketing? There were some shortcomings in the photographic capabilities in terms of details, but that is now a thing of the past, with absolute superiority in true colors. At this moment, the OnePlus 11 comfortably competes with any other flagship in this field and often surpasses them in the final result. No matter how many apps you open or what you do, the 16GB of RAM respond more than excellently. The issue of waterproofing should not worry you at all. I don't know why the company didn't officially declare anything on paper, but the device withstands accidents with water, rain, etc. It is stated categorically in its software. Only those who don't know what is happening around them claim 0% waterproofing, thus misleading people from the truth. So, congratulations to OnePlus for creating this monster with a normal cost that starts at 900 euros. It is highly recommended for purchase without a second thought.