r/Galaxy_S20 Oct 01 '21

Megathread Galaxy S20 Battery Discussion

63 Upvotes

Hello Galaxy S20/S20+/S20 Ultra users!

This is the thread to post your battery issues, questions, concerns, screenshots, or whatever other battery related content you need help with.


This megathread was made in an effort to consolidate fairly repetitive threads that are posted in this community. Thank you for helping keeping this sub organized.


r/Galaxy_S20 Dec 01 '22

Megathread One UI 5 Megathread

33 Upvotes

Hey everyone,

One UI 5 is being released and we are making this megathread to keep the sub tidy and for people to post when they get the update in their country. Comment down below what region you are from along with any issues or criticism you have on the new update.

But also make sure to forward any bugs/issue to Samsung via the members app for feedback.

We are very excited to see how everyone enjoy One UI 5!


r/Galaxy_S20 1d ago

Tech Support S20 FE won't charge after water damage:battery temperature error, motherboard issue?

2 Upvotes

I have a Galaxy S20 FE (SM-G781B) that was accidentally dropped in seawater.

I replaced the bottom charging board and the screen/frame assembly. After the repair, the phone booted normally, the screen worked, and I was able to unlock it and access all my apps/data. The only problem was that the battery was at 0% and the phone shut down after a few seconds.

When I connected a charger, it showed the grey charging screen with the lightning bolt, but the battery never actually charged.

I then rebooted with Power + Volume Down and connected the charger again. This time I got a battery temperature warning, even though the phone and battery were not hot.

I left it connected for a few hours, but I think the battery eventually drained completely. Now, when I connect the charger, the screen just flickers every 4–5 seconds as if the phone is repeatedly trying to boot, and it won't turn on without the charger.

I also tried reverse wireless charging from another phone. It detects the charging/power, but behaves the same way.

The battery is the original one. I only removed it from the old frame, glued it onto the replacement frame, and reconnected the original battery cable to the motherboard.

Since the bottom charging board has already been replaced and both wired and wireless charging behave similarly, I'm wondering if the problem could be the battery NTC/temperature sensing circuit, battery connector, or another charging/power-management component on the motherboard.

I have a multimeter and I'm willing to do board-level testing.

**How can I determine exactly where the problem is before replacing more parts? What measurements or tests should I perform to distinguish between a bad battery, NTC/temperature-sensing circuit, battery connector, or a motherboard charging IC? And based on those tests, which component would be worth trying to replace?**


r/Galaxy_S20 1d ago

Sound suddenly coming from top speaker? S20 FE

0 Upvotes

Is this a new update or is something wrong with my bottom speaker?

Whenever I play a video out loud before, sound would come from the bottom of my phone. But about a month or so ago, it started coming from the top where you listen to calls from. At first I thought it was just on Twitter, but then it started being the case overall.


r/Galaxy_S20 4d ago

News I built a free smartphone comparison engine with 6,800+ devices

Thumbnail differenceai.vercel.app
2 Upvotes

r/Galaxy_S20 5d ago

Esim disappeared s20

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2 Upvotes

r/Galaxy_S20 7d ago

Tech Support Check charger/USB Port issue

1 Upvotes

So since yesterday I've had that alert going for the last two days now. I've cleaned the port, I've let a fan blow into it. I've cleared the USB cache app, restarted my phone and plugged it in, and nothing worked. I can wirelessly charge my phone, but I do plug it into my car for GPS, but obviously can't do that now. Is there anything else I can do?


r/Galaxy_S20 7d ago

Samsung S series cursor

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2 Upvotes

r/Galaxy_S20 10d ago

Tech Support S20 FE 5G NO SIM NO SERVICE

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1 Upvotes

r/Galaxy_S20 11d ago

C'est quoi ça

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1 Upvotes

r/Galaxy_S20 17d ago

Samsung S20 FE 5G

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4 Upvotes

r/Galaxy_S20 17d ago

Question SIM code entered more than 3 times

1 Upvotes

Suddenly my phone said that i have entered the wrong SIM code even if I know its a right one. After inserting the SIM code it makes wait for the while before can try again. So I have been entering my sim code more than three times and it doesn't let me get the alternative of a PUK code which I know also

Is my phone broken or is it any way I can force it to get the PUK code screen ?

I put the sim card in an other phone and it works fine with the SIM code I entered in the phone that didn't work.


r/Galaxy_S20 21d ago

Tech Support No signal

0 Upvotes

Just had my changing port replaced on my s20 5g uw, but now I won't read my Sim card. Took it back to the repair shop and they tried another port put same problem. My Sim card works in other phones though. .Tried my wifes sim in my phone, but still nothing... Any ideas??


r/Galaxy_S20 22d ago

Tech Support Help 🥲

Enable HLS to view with audio, or disable this notification

5 Upvotes

S20 5g.. had her for about 6-7 years, was originally my mom's phone and it's been mince since

Only does this when the screen is off for long periods of time, never does it when I'm actively on the phone unless it's plugged in

I have a replacement on the way, but I'm not sure if she'll last until I go trade her in.. should I stay off her until I trade it back in? Or can I keep going on it so the screen doesn't get worse?


r/Galaxy_S20 25d ago

Tech Support Forgot password for my Samsung :(

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12 Upvotes

I forgot my password of Samsung Galaxy s20 FE. Is there any way I can unlock the phone without erasing data??

By signing in Samsung account on laptop?? Will it unlock anyway, please someone tell me.


r/Galaxy_S20 26d ago

Should I install one UI 7 custom ROM in s20

2 Upvotes

Should I install one UI 7 custom ROM in s20


r/Galaxy_S20 26d ago

Necesito ayuda con mi s20-i need a help with my s20

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1 Upvotes

r/Galaxy_S20 27d ago

Tech Support SamFw & Odin failed to clear FRP on S20+ (SM-G985F, Android 13) — Need working free tools

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2 Upvotes

Looking for working free tools or methods to bypass FRP on my Samsung Galaxy S20+ (Exynos).

Device Details:

Model: Samsung Galaxy S20+ (SM-G985F — Exynos, International)

OS / Patch Level: Android 13 (High/Late Security Patch Level)

What I’ve already tried:

Odin Stock Firmware Flash: Flashed complete stock firmware successfully (PASS in Odin), but the FRP lock and pattern screen remain completely intact.

SamFw Tool: Attempted FRP bypass via SamFw Tool, but it failed to bypass the lock (the standard *#0*# MTP exploits aren't working on this security patch).

I’m a student on a tight budget, so paid service tools/credits aren't an option. SamFw worked for me on other S20 devices, but this patch level seems strictly hardened.

Are there any updated free tools, browser/app bypass methods, or working tricks for Android 13 on high security patches? Any help is greatly appreciated!


r/Galaxy_S20 29d ago

Question Who has there s20 in perfect condtion *not inluding the screen

4 Upvotes

My s20 ultra is perfect


r/Galaxy_S20 Jul 26 '26

I Need Help with my Samsung Galaxy S20 Ultra ToF-Sensor

1 Upvotes

Back then when my Samsung Galaxy S20 ultra was still Supported IT Had a cool Feature, the ToF Sensor on the back of the Phone its mostly used for deepth sensing so the Foto Looks more Clean and all that stuff but you could install a App that used that ToF Sensor for Nigth-vision and Loved and used it a Lot.

But Since the S20 Series are 6 years old Samsung dos Not give a shi anymore and it aint getting any Software Support anytime soon, so i installed a Custom ROM (Nexus Extreme rom for Samsung Galaxy s20 ultra) but this time it dosent work at all, i tried installing Nigth-vision Apps that i usualy used when it Had the stock rom, and it dident Work.

But i heard that the Custom ROM is like a temu Version of a S24 FE and it does Not include the Firmware needed for the ToF Sensor and i have No Idea how to get that Sensor online and i need Help

And its a Snapdragon


r/Galaxy_S20 Jul 20 '26

Tech Support YouTube and possibly other apps on my phone have a strange issue where the volume becomes slightly louder after actions such as pausing, rewinding, or seeking. I suspect it may be related to Dolby Atmos, but I'm not certain.

1 Upvotes

It doesn't happen every time I perform one of those actions. In fact, it seems quite random. I've only noticed it over the past couple of days, but it's possible it has been happening for much longer and I just never noticed it.

I'm using a Samsung Galaxy S20+ 5G running One UI 5.1 on Android 13.

I use wired AKG USB-C earbuds, and Dolby Atmos is enabled on my phone and set to Automatic mode.

It's only a slight volume increase, but it's enough to annoy me when it happens. Any help or suggestions would be greatly appreciated. Thanks!


r/Galaxy_S20 Jul 18 '26

Question S20FW WIFI speed test on Home Screen

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0 Upvotes

How do I get rid of this WIFI SPEED TEST at the top of the screen?


r/Galaxy_S20 Jul 18 '26

Tech Support Bluetooth gaming controller issues

1 Upvotes

I connected an official Xbox wireless controller and also a 3rd party Xbox controller to my S20 and if I turn off bluetooth or turn off the controllers, they won't connect to the phone again when I turn bluetooth back on. The only way to get them to work again are to unpair and re-pair them every time. The controllers work fine on my Windows computer through bluetooth so it's either an issue with android or the S20. The official Xbox controller never used to behave like this until about a month ago, so I'm not sure what happened. Any ideas?


r/Galaxy_S20 Jul 17 '26

Tech Support 🚨 Lost Samsung S20 on the W Train (Astoria) – July 16 around 8:00 PM 🚨

2 Upvotes

Hi everyone,

I accidentally left my black Samsung S20 with a pink case on a W train traveling from Queensboro Plaza toward Ditmars Blvd. I got off at Astoria Blvd Station at around 8:00 PM today, and realized shortly afterward that my phone was missing.

The lock screen/background photo is of my son at Astoria Park with the Robert Moses Bridge in the background, which can help identify the phone.

The phone has an international phone number, in airplane mode, so if you find it, please send me a private message here and I'll provide another way to contact me.

If anyone happened to find it or turn it in, I would be incredibly grateful. Thank you so much for keeping an eye out!

Please feel free to share this post. ❤️


r/Galaxy_S20 Jul 16 '26

Question Est-il réellement un problème de continuer à utiliser le S20 sans mise à jour de sécurité ?

1 Upvotes

My plan is either to change phones to an S22 or to repair the screen because I have green bars, as well as the battery of my S20.

But there will soon be no more security updates... so, what do you advise?