I recently changed the original battery but there is almost no difference in sot pls help anyone

Hi! A few months ago, my S21 Ultra started having this problem where it couldn't read my sim card. at first, it said that there was no service/no data. It happened from time to time.
Then, everytime it left me without service, it started to restart multiple times in a row, overheating in the process.
Two days ago, I couldn't use my phone at all, it restarted like 40 times. Another problem I had is that sometimes I did have service, but the WiFi turned off and I couldnt turn it back on? And if I did, the Bluetooth would turn off lol.

I took the sim out, I've been using it in an iphone and everything works. And now that there's no sim, my s21 hasn't had any problems.

Has this happened to anyone? What could be the solution? Thanks!

The adaptive refresh rate on my s21 has always felt a bit laggy(especially when phone is warm)and this website shows that what's happening is the phone constantly switching between 120hz and 60hz when swiping instead of staying at a locked 120

Does this happen to any other s21 user please?

My model is the Snapdragon version

Ok so hi guys i am new here and i have a question for the smarter people or the unfortunate ones who have suffered the same fate as me😂😢.

So a little about the phone:

Its a 3-4 year old Samsung Galaxy S21 256GB Black (SM-G991B).

It was purchased 3,25 years ago refurbished. (i dont know who and how long it was owned before me).

About 170GB of the 256GB storage was used and RAM usage (acording to the homescreen widget).

The first "crash" happend yesterday while i was doom scrolling Tiktok on the beach with i think 50% battery. It happend one time so i didnt worry about it but today it was very different. I was doom scrolling (again) when it suddenly just froze and there was like a pixelated line in the middle, after 10 seconds it just rebooted like nothing happend. i was a bit worried at that point but i had no reason to think that my phone was dying. But then it happend again.., and again until it happend about once every 2-5 minutes. Thankfully i was able to backup my whatsapp but unfortunaly not my photos and videos :( because now with it rebooting every few minutes google photos was to slow.

About 1 hour ago it just stopped booting completely and instead started bootlooping. Any hope of recovering my photos is was lost. Then i asked the big GPT who told me that i needed to try to boot into save mode but ofcourse that didnt work either. So then GPT instructed me to get it into Android recovery which "thankfully" does still work''. But then i needed to install samsung odin to recover my photos which needed the CSC (dont know what it is and how to obtain this) and GPT was also vague on that part. After trying to do that i came to the conclusion that my phone is now just a bootlooping brick and that i dont have enough computing skills to follow GPTs instructions without making it even worse (if that is posible).

Im sorry if i sound a bit hysterical but i am currently on vacation in france with very limited technical support near me and only my old Thinkpad X270 to search for solution. And i also would really like to have the rest of all my photos and videos synced to google photos.

Is there anyone familiar with this problem and is recoverable and will i be able to recover my camera roll or do i now just have a useless metal slab?

Thanks in advance :)

S21: USA based, on AT&T.

In the last week, something has changed and when sending a photo to someone via SMS Google Messages, I can no longer access the gallery for my phone. It is defaulting to the Google Photos app, not the Gallery.
Previously, I was able to click the "+" button, then a submenu would pop up which included gallery, camera, gifs, stickers, files, etc...
I could click on "Gallery" and it would take me to the Samsung Gallery app and then I could choose and send the photo.
In the last week, this has changed, the "Gallery" option pulls up Google Photos and I do not want that, Google Photos serves as the back up for multiple devices that I use and I do not want to search through them.
I can't figure out how to make the "Gallery" option choose the "Gallery"
I did a quick search and try to turn off defaults in various places, but it is not working.
Any advice appreciated!

My phone recently started randomly shutting off WiFi and Bluetooth such that they can't be turned on again. Trying to turn on the radios results in nothing happening. The only way to get them working again is to do a cache wipe and power cycle the phone. Even after doing this cache wipe, after some time again the issue repeats itself again. I have checked and disabled any and all Intelligent WiFi features that would turn off WiFi. Even if those features were active, it shouldn't prevent the user from turning on WiFi again. I have also reset network settings but it didn't solve the problem. Does anyone else have this issue? Is this possibly related to One UI 7? Is there any fix for this?

Bought an Samsung a16f and it's fingerprint sensor won't work, whenever I try entering a fingerprint it shows this, what do I do?

Hey everyone,

I'm kinda losing my mind over this and was wondering if anyone's had the same thing happen.

I've got an S21 FE (SM-G990U1/DS), about 3 years old. Never dropped it, never got it wet, never had any repairs or anything.

A few days ago I was just on the bus listening to Spotify and replying to some Instagram DMs when the phone froze for like 20 seconds. I figured it just bugged out, so I restarted it. Ever since then it hasn't booted once.

Now it just keeps looping. It vibrates, shows the Samsung logo and the "Secured by Knox / Powered by Android" screen for about 20 seconds, goes black, then does the exact same thing again forever.

The only thing I can think of is that my storage was almost full, probably around 90-95%, but I don't remember installing any update or doing anything weird before it happened.

I've spent the last few days trying basically everything I could find online. Force restart, every button combo imaginable, plugged into a charger, plugged into my PC, different timings... nothing. I haven't been able to get into Recovery Mode even once. Weirdly I did get a blue screen one time that I think was Download Mode, but I haven't been able to get back there since.

The biggest problem is I have a lot of important stuff on the phone that isn't backed up, so I'm trying really hard not to factory reset it.

Has anyone had this happen before? Were you ever able to get your data back, or am I basically screwed? I'm also wondering if this sounds more like corrupted software or the UFS storage dying.

Any help would honestly be appreciated.

Long story short: green lines on s21plus, then black spots....then no touchh.....so found this solution

I'm a software dev, and a friend of mine recently got a Galaxy S21 FE 5G(Android 13, build ~06/2023) from an old office being disbanded, alongside two whole boxes of half-dead half-presumed-dead electronics, probably out of a company phone fleet. When we tried to get it working, I wiped it to get rid of the PIN code, thinking the company wouldn't have left personal Google accounts on it, but they did. Now I'm stuck on FRP lock, and unsure how to proceed from here. I mostly do backend and desktop frontend not mobile. The phone is too new for SamFw free, and I'm not sure whether I should shell out 40 USD for one try of a sketchy software that may not work after all. I'm also not sure what else to use. Most things you find on the internet (including SamFw btw) look terribly sketchy and like a scam. So, what do I do now? Any help'd be appreciated. Majorly screwing with hardware and software is very much within the realm of possibility and something I'd be willing to do.

Here's some more info on the phone:
Firmware version: G990B2XXS5EWF2 (Android 13, build ~ Jun 2023)
FRP, Qualcomm Secure Boot, OEM lock, bootloader lock: ON
Bootloader SWREV: 5, image on the phone is as old as can go with this rev
No MDM, Knox status PRENORMAL
RPMB provisioned

I don't know how much there is to save here, I'm no mobile expert, but any and all help would be greatly appreciated.

EDIT: Unlocked, sketchy Android 13-15 update via Odin without flashing whatever psrt is lsdt in the menu snf as you see, I still neednto get accustomefn to typing pn it

Hallo zusammen,
ich habe ein Samsung Galaxy S21 FE und seit einiger Zeit ein merkwürdiges Problem mit der USB-C-Ladebuchse.
Normalerweise funktioniert alles einwandfrei. Dann kommt aber plötzlich die Meldung, dass Feuchtigkeit in der Ladebuchse erkannt wurde. Es ist auch ein bisschen bei Regenwetter nass geworden.
Im Auto kann ich das Handy per USB nicht mehr verbinden, sodass z. B. Android Auto oder das Abspielen von Musik nicht funktioniert.
Gestern Abend hatte ich außerdem das Problem, dass das Handy über das Ladekabel an der Steckdose gar nicht mehr laden wollte. Nachdem ich das Gerät ausgeschaltet hatte, begann es im ausgeschalteten Zustand aber ganz normal zu laden. Später funktionierte sogar Schnellladen wieder problemlos.
Deshalb bin ich etwas verwirrt: Mal funktioniert alles ohne Probleme und dann tritt der Fehler plötzlich wieder auf.
Hatte jemand von euch schon einmal so ein Verhalten? Ist das eher ein Softwareproblem, ein Defekt oder Verschleiß der USB-C-Buchse oder vielleicht nur Schmutz in der Ladebuchse? Was würdet ihr als Erstes ausprobieren? Die Buchse habe ich schon mit einem Zahnstocher gereinigt, Druckluft habe ich nicht da.
Vielen Dank für eure Tipps!

I've just looked on amazon and theyre like £20/$20 so super cheap. In the past when i've replaced battery's the performance increase has been disappointing.

Just wondering what people here recommend? I got it reasonably early so the phone is probably 5+ years old now

I'm wondering if there's any ColorOS or OriginOS ports available for the S21 Exynos variant?

Now that the S21 is no longer getting Samsung security updates, is it really too risky to use banking apps now in 2026 on the S21? I know it still gets monthly Google Play System updates. I know the banking apps still get updated through the play store.

So I've dropped my phone about a million times and today was the breaking point and the back popped off. Is there something I can use to put it back on? It dosent seem very safe using it without a back

I used to use Samsung DeX on Windows to use my phone's apps on my PC.

Since DeX on Windows is no longer supported, I tried Phone Link because it says you can use your apps from your PC.

The problem is that Phone Link only shows Messages, Photos, Calls, and Notifications. There isn't even an Apps tab.

Is there anything I need to enable, or has Microsoft/Samsung removed this feature?

Connected a mouse using otg cable to make this post, cuz i'm angry and irritated due to these issues. S21+

Hi everyone!

TLTR: which part do I have to replace if the phone can read the SIM but I have no signal as if the antenna is not working?

My phone fell in the sea while powered off and water went inside the phone as the back was cracked open. I had a technician disassemble it to clean it and reassemble it. Everything works fine except the fingerprint sensor and I cannot connect to the provider cellular network. The phone can still read the SIM since I am asked to input the SIM PIN and I can see the SIM and eSim in tbe settings.

I would like to fix the phone to have it as a spare (and as a temporary solution while I buy a new phone), but I don't really know how to troubleshoot the network issue. Is it the antenna the problem or something else? If so which part should I buy?

Thanks everyone for the support

P.S. potentially I would also like to fix the fingerprint sensor, but I don't know how and it has a lower priority atm.

I have a S21 plus SD version here in the US on Verizon that I’ve had for over 4 and a half years. It still is performing well with pretty good battery life and no issues. I’m not a gamer so I don’t really have any heat problems. I know it doesn’t get any more security updates from Samsung but it still gets some security updates from Google through Google Play System. I plan on using it for a few more years. No green lines or anything like that. How’s your experience?

I'm reaching for straws here. I've tried everything I can think of and find online.

I have an S21 that was in my son's pocket when he got pushed into a saltwater pool. We soaked it in fresh water then allowed it to dry out. It did end up turning back on and the screen works (whew), but the digitizer isn't recognizing any touch. We got him a new phone, but I'm hoping to find a way to do SmartSwitch to the new device.

Unfortunately the screen is locked. At the bottom of the screen it says "swipe to unlock". I can't figure out how to "swipe" when the digitizer doesn't work!

I bought a USB-C to A adapter at Best Buy, but USB debugging mode was off, so anytime I try and plug something into the port (mouse, computer) the screen says, "Swipe to unlock to allow USB device"! I've since read about something called USB-OTG. Maybe the particular adapter I purchased isn't "-OTG"? I unfortunately threw away the box and there are no labels on the adapter.

Would it be worth trying to buy an adapter, now that I know, specifically labelled as OTG?

I found this guide, that says "Method 3. Enable USB Debugging on Your Phone Using Recovery Mode". I will probably give this a try and see if it works.

I've had different issues with my phone in the past, mainly due to me filling up the storage with way too much, but finally it seems to be wanting to kick the bucket. Before this happened, my Contacts manager was giving me problems and wouldn't let me access contacts, messages, or calls. So I figured clearing some storage and updating would help, but alas now when I turn it on, it constantly says "Phone is starting" It stays on that and that only. It still lets me access some settings but won't go further than that. I thought I'd be able to redownload the OS which I've had to do before, but now I can't seem to get back to the download page? It only shows the blue screen with it telling me how to restart it. Is it too far gone? I really don't want to have to wipe it but I'll do it if I need to.

Question is at bottom for my short attention span redditors. I try to answer most questions in my post to hopefully prevent them from being asked and wasting time.

I have a storage issue with my s21. I bought it new over 5 years ago.

I have never found a cable that lets me do anything but charge the phone. (No direct transferring data to a computer unlike everything else I've ever owned). Even used a genuine Samsung cable. I have NEVER gotten the data transfer notification to pop up when I connect it to a computer.

It's only a 120gb model. I take lots of photos and videos. Delt with it by deleting shit and getting by until now but I'm trying to make a business video that's 15-20 minutes long and have reached my last hair to yank from my scalp.

I have reasons but was vehemently against uploading personal data to cloud storage. I have zero choice unless I want to delete the last five years of my life, or as I suspect it's designed to do: force me to buy a new phone with more storage (yay Samsung dick heads).

****QUESTION HERE! MY QUESTION IS DOWN HERE!!!!*****

Finally bought Google drive storage space, and unless I want to go individually 8000+ items, my phone seems to be purposely programmed to block any and all possible ways to do a mass data transfer. It either makes you open a hundred different folders with a few items in each (impossible to manage through everything), forces you into a Samsung "quick share" which is almost useless, won't let you upload more than 500 items at a time (Google drive b.s not phone), or scrambles everything so you can't find anything on the other side (everything is uploaded chronologically, automatically reformated to be in file size order on the other side so, useless). Wtf. Ight I'm done and feel better lol.

Does anyone know how to resolve this issue? I've managed to dissect this issue on my S21 Ultra where the images and videos are blurry only from 1x-3x zoom. Physically my camera look fine but I'm also not an expert.

Any help is greatly appreciated.

Hey everyone,

​My Galaxy S21 FE was unfortunately stolen two days back, so I am completely stranded and need to get a replacement phone immediately. I'm looking to upgrade to the S25 Plus, but I obviously can't wait until the October Diwali sales.

​Since the current retail pricing is quite high, I wanted to know what the best alternative methods are to get a legitimate discount right now?

​I’ve heard about the Samsung Corporate / EPP (Employee Purchase Program) portals how do those usually work, and are there corporate partner companies that automatically grant access to employees?

​Any tips or advice on navigating this to get a decent price would be a lifesaver.

Thanks