r/S21Ultra

I just bought a S21 ultra 5g and after updating it the memory went from 256GB to 128GB. Is there something, I missed?

For so long, I wanted to keep going with this phone. For years, it had been truly great.

That is, until the past year. Camera blurriness issues, battery draining, wifi and bluetooth randomly dropping, malfunctioning NFC...I thought my phone was going haywire. That, and the lack of future upgrades or security updates was enough to finally make me give up.

I swore I wanted a Pixel, but all the bad reviews made me go back to Samsung, so I finally ordered the S26 Ultra. So after 5 years, I'll finally be leaving this forum. It's been real!

My s21 ultra has been a great device, i love it, but im facing multiple infamous green lines on my screen so im wondering if i should repair it with an original service pack or simply move on to a nothing phone 3a, the repair its around 170 usd and the new phone its 390 usd

Which one would you choose as a secondary phone? Already bought the A52s, it has great battery life and good enough camera and performance, love it. But now thinking about selling and getting the s21ultra instead... kinda worried about the battery on that one.

A52s - 70€ mint condition

S21ultra 256 GB used - 120€

I've had my s21u since its launch and tbf it never disappointed me or made me want to upgrade. The last year or so I had some difficulties with the the wifi/bt turning off automatically and not turning on again but a simple pinch on the upper side made it work so I didnt bother to check/repair it.

It has seen a lot of falls from different heights on different grounds and the screen never even had a scratch. Yesterday it fell from ~30cm on a thin piece of steel and the screen cracked, making the phone impossible to use. The screen is completely white and green with sometimes yellow.

I called around in my city and found the cheapest shop that can fix it. €150 but it is an aftermarket screen (fingerprint would still work apparently). It should extend the daily use of the phone with at least another year.

What bothers me is that I would probably already upgrade within a few months (due to security updates) so the timing is very bad.

I looked around and found an s23u for €250 and some other good options from chinese brands.

I am considering buying a newer model and ordering a cheap screen from aliexpress for the s21u but it has the possibility of not working and would make it more expensive than I can afford, especially with travel plans in a few weeks.

What would u do in this situation?

And do you have recommendations for the screen?

-There is plenty of stuff in my phone I dont want to lose access to so I definitely want to repair it somehow, even doing it myself with a used or lcd screen is an option.

Is there any way to get adaptive clock on s21 ultra on one UI 7

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Bought a used SM-S908N (Korean variant) that was previously opened/repaired before I got it. Using it in Lebanon on Alfa's LTE network (no 5G here).

Symptoms:

- Signal randomly drops to "Emergency calls only" for 2-3 seconds, then auto-recovers

- Happens 5-10+ times a day, no pattern I can find (different locations, doesn't seem tied to movement)

- Sometimes get a popup: "Something went wrong with your network connection. Try restarting your phone, or tap here to set your roaming network"

- Already tried: locking to LTE-only (no change), cleaning/reseating the SIM (no change), reset network settings (haven't tried yet)

- Since it was previously opened, suspecting a loose antenna flex cable connector

Has anyone dealt with this exact pattern on an S22 Ultra? Trying to figure out if this is a known antenna cable issue before I take it to a repair shop — want to know what to ask them to check specifically.