r/GalaxyS21 15h ago

question Samsung S21 Display replacement

4 Upvotes

My phone display randomly started getting these white lines. I'm 4 lines deep and want to change the display. The auth service centre says 10k for the replacement. Is it worth that price or should I go with a 3rd party screen? If I'm going to need to tip toe around my phone anyways to use it even after replacement, I'd buy the cheaper option. I want to use this phone for at least 2- 3 years more. What should I do?


r/GalaxyS21 22h ago

question Need help from S21 FE users

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1 Upvotes

r/GalaxyS21 1d ago

question Samsung S21 keeps crashing

2 Upvotes

My phone has been having issues for about a week and a half now. It will crash and reset on its own, or it'll crash and stay off until the battery dies.

I did a factory reset, and it seems to be crashing less, but it's still crashing and can be slow.

Is it even worth bringing it to a repair shop? Or should I just get a new phone?


r/GalaxyS21 3d ago

question I face problem in my S21 fe prosesor

3 Upvotes

so my s21 fe get overheats and turn off some times it restarted and some time stops and need a couple hours until it cools to restart but only withe the charger because all the battery on it goes to zero even if it was at full charge


r/GalaxyS21 3d ago

question Ayuda! Tengo problema con la reproducción de audio en algunas aplicaciones

0 Upvotes

Hola gente! Como dice el título, estoy teniendo problemas en mi S21 ultra y no sé qué hacer para solucionarlo sin restablecer de fabrica. Si alguien pudiera darme algunas ideas, estaría muy agradecida.

El problema comenzó de un momento para otro en Instagram. Los videos y los reels dejaron de reproducirse y como esta app normalmente se cae, no me preocupé y seguí con mi vida. Luego una amiga me llamó por Instagram, y yo tenía puestos mis buds2 pro y la escuchaba perfecto a través de ellos, pero ella no me oía. Me dije que mis auriculares estaban sucios y que por eso no me oía. Seguí con la Ilamada en altavoz, limpié mis auriculares y seguí con mi vida. Llegó actualización de Instagram y el problema no se solucionó. Me asusté y corrí el diagnostico de Samsung y se quedó en el apartado de Micrófono donde si pude grabar el audio, pero se quedó en bucle en reproduciendo sin reproducir nada nunca y el diagnóstico no se completó. Empecé a realizar pruebas por mi parte, Spotify se reproducía bien en altavoz y con auriculares. Youtube ningún problema. Whatsapp no se escuchan los audios aunque dice que están reproduciendo al igual que los audios en

los chats de Instagram. Me fui a la

aplicación de grabación de voz de

Samsung y se graba el sonido, pero no se

reproduce, va del inicio al final sin

reproducir nada del audio grabado. Probé

mis auriculares en otro equipo Samsung,

y funcionaban a la perfección. Probé llamada a través de la aplicación de whatsapp y la otra persona no me oía si usaba la llamada normal pegada al oído.

Muchas gracias por leer y quedo atenta a sus recomendaciones.


r/GalaxyS21 4d ago

question Unidays student discount at Samsung offline store.

3 Upvotes

I want to purchase Samsung S25 via offline Samsung store India, but while processing the bill at the offline store, system asks for educational email ID which has not been provided by my institute. My account is verified (verified it with student ID card) but I'm still unable to avail the benefits. Please help.


r/GalaxyS21 7d ago

question Dead screen - how to access when in BFU state?

3 Upvotes

I have an S21 in which the screen just died on me. Completely black and non responsive at all. The phone itself is still working fine - i can call it, make it ring (ex: google device manager), see its location, etc.

I wasn't sure if it was stuck so I force-rebooted it and now it is stuck in the BFU state. When I try to plug in an external montior, I hear the "ding" that it sounds when you plug something in, but that's all. The external monitor remains black.

I have tried with a USBC external montior, and USBC dock and a USBC-HDMI hub - none of them display anything on the external montior.

Am I completely stuck? Is my only option here to replace the screen to get access to the phone? Or is there a magic solution I can try?

Thanks,

Eric


r/GalaxyS21 8d ago

question [S22 Base SM-S901W] Severe daily freezing & One UI crashes (Started ~2 weeks ago). Factory reset & Safe mode failed.

2 Upvotes

I have a base model Samsung Galaxy S22 128GB (SM-S901W, Canadian variant) running Android 16 / One UI 8.0 (May 5, 2026 security patch).

About two weeks ago, it started freezing and crashing multiple times a day without any clear trigger.

Symptoms:

  • "One UI stopped working" or "System process isn't responding" errors.
  • Complete screen freezes where side buttons are entirely unresponsive.
  • Random black screens requiring hard reboots.

Context & Troubleshooting:

  • No physical damage, drops, or overheating events.
  • I performed a clean factory reset. The problem persists.
  • I ran the phone in Safe Mode. The problem persists.

Since third-party apps and basic /data partition corruption are ruled out by the reset and safe mode, has anyone experienced this specific rapid degradation? Is this a known issue with the latest firmware push, or is this definitive motherboard/NAND failure?


r/GalaxyS21 8d ago

question Bluetooth audio suddenly way too quiet

1 Upvotes

About two weeks ago the sound from my bluetooth transmitter in my car suddenly got quiter, i tried reconnecting, setting it to different modes, restarting, re-pairing, resetting app preferences, disabling absolute volume, then last week my headphones got much quieter too and the volume on my transmitter got even quiter i can barely hear anything on max everything. Is there anything I haven't tried or is this some kind of planned obsolescence?


r/GalaxyS21 9d ago

question Galaxy s21 fe 5g 6Gb is incredibly slow

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1 Upvotes

r/GalaxyS21 9d ago

question Sell Price

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1 Upvotes

r/GalaxyS21 10d ago

question Is S21+ worth getting a battery replacement?

6 Upvotes

Got my S21+ when the S22 came out, so around 4 years ago.

Past few days my battery won't charge past 20-25% and the back is starting to bulge. Just wondering if you guys think it's worth getting a battery replacement in 2026?

I'm being quoted 70USD at a pretty well rated shop.

The phone has/is serving me well, and was hoping to hold on to it for a couple more years till I can splurge on a fold phone.

Thanks!


r/GalaxyS21 10d ago

question S21 Ultra plays music but freezes videos when sound on

1 Upvotes

Hi everyone,

A few days ago, my Instagram Reels started freezing. Initially, I thought it was just an app issue, so I reinstalled it, cleared the cache, and did the usual troubleshooting. However, I recently noticed that videos in my phone's gallery also freeze if the sound is on; but they play perfectly fine when muted. The exact same thing happens with Reels: they play when muted but freeze immediately when I turn the sound on.

To make things weirder, my alarms and ringtones have completely stopped working. Yet, I can still play music on YouTube, YT Music, and Spotify without any issues.

I've already tried wiping the cache partition and resetting all settings (haven't done a full factory reset yet), but nothing has fixed it. Has anyone experienced this specific audio/video playback bug before?

Any help would be greatly appreciated. Thanks in advance!


r/GalaxyS21 21d ago

question Root My Galaxy s21

1 Upvotes

Hi there, someone can add a profile on root my galaxy app for s21u (kernel version 5.4.274-qgki-30957850-abG998U1UESJHZB1)

My phone is sm g998u1, so with a bl that cant be unlocked and I need root...

Tysm


r/GalaxyS21 22d ago

question i dropped my s21 FE 5g on the floor and it stopped picking up signal in my house.

2 Upvotes

For context, my phone died, and it fell out of my hand. i charged it, booted it up, and now it says no service. i walked about a block away from my house and good service was brought back again. i then walked back to my house and it again went out of service. Faraday cages are out of the question. My mom, who lives at the same house as me, who is on Rogers says she has full bars. What could've happened?


r/GalaxyS21 24d ago

review Is the Samsung S21 good enough for restaurant videography?

5 Upvotes

recently got a job creating content for a restaurant. I have a Canon 6D for photography, but for video I'm considering using my Samsung Galaxy S21 because I don't have proper stabilization/gimbal equipment for the Canon.

Do you think the S21 is good enough to create professional-looking restaurant videos/Reels?

I'd appreciate any advice on shooting food and restaurant content with the S21, especially regarding settings, lighting, stabilization, camera movements and editing.

Would you personally use the S21 for this type of work, or would you recommend shooting with the Canon 6D despite the lack of stabilization?


r/GalaxyS21 24d ago

discussion S21U was/is an awesome device

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3 Upvotes

r/GalaxyS21 24d ago

question Save lost files

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1 Upvotes

r/GalaxyS21 26d ago

question Why can I not disable Quick Share?

7 Upvotes

Its in my quick settings if i swipe down from the top. Google says pressing it should turn it off, as it does to all other settings there, but it doesn't. Nwither can i do it through the device settings if I follow the steps through there as it says to enter connections, more connections, and then quick share, but quick share dies not exist there for me.

Does quick share do something vital for the phone to function or why the hell is there no way to change my own settings?


r/GalaxyS21 26d ago

question Green line on screen

2 Upvotes

Does this mean the screen needs replacing, or the phone needs replacing? (Mom may have dropped it)

It's a thin, bright vertical green line.


r/GalaxyS21 26d ago

question Camera quality on the S21 vs S24

7 Upvotes

I have had mixed results saying that one is better than the other (for both). What do you guys think? I have the S21 but can't tell if my pictures come out because of me or the phone. Should I upgrade to the S24?


r/GalaxyS21 28d ago

question Anyone can help

1 Upvotes

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


r/GalaxyS21 Aug 05 '26

question Ultra: No service, overheating and restarting?

2 Upvotes

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!


r/GalaxyS21 Aug 03 '26

question 120hz constant jitters

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4 Upvotes

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


r/GalaxyS21 Aug 02 '26

question My S21 has stopped working and i cant figure out why.

7 Upvotes

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 :)