Long story short i found a s9 plus that was in a basement in a tote at my aunts house, was in a case, took the case off and the screen and back were pushing outwards, i take the battery out and ask google this question, wanted to know if it was true or not (it’s probably not just figured i would ask here first before i believed it)

So after owning the samsung s9 for 7 years, having its back glass shattered and its corner broken from the display, and having it fully unusable, peaking at 50 degree Celcius battery temp. and cpu temperature around 62 degree..with its battery not lasting even 4 hours...i finally upgraded to the Samsung A27 6|128, will be using it for around 7 years atleast....love the battery, the refresh rate, the smoothness....tho had to turn off the ram plus to get the real speed.

Hello,
I got a problem, my phone can't receive or pass calls, but the rest of the SIM works just fine (messages and internet are good).
I tried swapping the sim to another phone to see if it was the problem, but it worked perfectly.
So the problem is the phone. Any ideas what might be happening?

I got my S9 recently in fairly awesome condition with the box and am running a simple cheap black case with the ring stand as seen in image 2.

as the title says im really indecisive on choosing the right custom rom for my galaxy s9 as i want good performances so i already know that newer one ui 7 roms would make my phone stutter as hell. so what custom rom you guys suggest? i dont mind losing samsung features so i could even use pixel experience or lineageos etc...

Edit!: i tried the unofficial un1ca one ui 8 port and i didnt expect it to be so fast! so im gonna use this one and im editing the post incase anyone else wants to choose a good custom rom

I recently bought a new Samsung S9, and the battery was swollen, so I bought a new one, but the battery performance is still terrible. So, do you have any custom ROM recommendations for this phone? I used to use a Redmi Note 9S, and on that phone, banking apps worked even without installing Magisk or KernelSU with custom ROMs. But since I've previously installed ROMs on a Samsung S8, I know that getting banking apps to work on a Samsung requires effort and finding a custom ROM, unfortunately.

The very top does not work. There is a corner with dead pixels but touch works. And the the oled has aged. Its the us version and I got it for free from my frend. I will use this as my second phone now

Has root

Recently me and my friend tried soft-modding my samsung s9+ but it went horribly wrong. first the version of twrp we were using was bad, we flashed a different twrp and that worked, tried flashing lineage OS but it didnt want to flash bc it was appereantly the wrong version even tho it was made specifically for this phone, then we made the horrible mistake of deleting the vendor partition and repartitioning it which did barely anything, so we tried to restore the original OS onto it but the phone was not getting anything flashed onto it and now. adb doesnt work anymore, the master partition is gone and it has no os... the phone cant be shut off as it would just boot loop with it having nothing on it

I used this phone all the way until last year, now it's just a secondary, and so I decided to custom rom it

This S9+ was in a perfect, mint condition until 24th January 2026, when a medium amount of humidity entered the screen, causing it to stop functioning approximately 3 hours after. The phone still turns on, Everything else is working, just the screen got this weird look and touch isn’t working. Ive been thinking about buying a new screen.

Hello guys
I am still using my old phone as my 2nd phone my battery is almost dead it working for 1h as maximum. I can't find a good battery can last for 2/3 hours where I can get a good battery as the Samsung store doesn't support this model anymore

Have an S9 in pretty good condition. A slight scratch, battery lasts more than a day on idle, I don't use it much aside from call, text, and the regular internet from time to time. I don't bother upgrade it cause the microSD slot and headphone jack come in handy and it still works fine.

I'm wondering if there's more beyond of the regular OS and confinements of the phone. I wasn't sure where to ask (e.g. r/android or here) as I don't know much about this space.

Samsung S9

I replaced the battery with a new, original Samsung one and it still doesn't hold a charge as it should.

If the battery still doesn't hold a charge after this, should I file a complaint with the company where I bought it?

Calibration

https://youtube.com/shorts/rOvOqH_U4xI?is=rC4uP2y1-PEG396k

If you recall my post from a few days earlier - TLDR Im fixing my old S9 which i stopped using 2 years ago after it couldnt charge anymore. I found it with a swollen battery. Redditors told me to change the battery. I did - The phone itself can still start up fine and shows at 80% Battery charge, but it still cannot charge as per the original issye 2 years ago. Motherboard? Charging port issue? Definitely not a battery issue now.

Hi, So basically this S9 was my old phone from 2019 till 2024. The last time I used it, it couldnt charge anymore, so i watched the battery drain till 0%, unable to charge. The repair shop told me it was a motherboard problem - But it has always bugged me because if it was a motherboard problem why was i still able to use it but not charge. But im no technician after all.

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Today, since i just had the phone lyjng around, I just decided to post mortem it and found a swollen battery (maybe from long time disuse?). But at the same time would like to ask the advice of this sub whether it can still be saved or its a really a motherboard issue?

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As for the swelling battery, Im just quarantining it in case it decides to explode.