iFixit - Answers With Device "Samsung Galaxy Note 20 Ultra"

Samsung Galaxy Note 20 Ultra: Nothing changed after a battery change

Thu, 05 Mar 2026 09:05:22 -0700

The old battery was very weak, over 4 years old at this point, and the Samsung Members app was saying that the battery health is low. So I bought the battery here on iFixit about 2-3 weeks ago, and successfully changed it. First of all did the battery calibration method as prescribed on the box, charged it to 100%, and let it drain, did it a few times. Still nothing changed, the phone kept saying it has 10 hours of battery life at 100% and rapidly going down from there. Samsung Members still said low health, and AccuBattery reports about 82% of battery life remaining. Next I tried resetting the BatteryStats in *#9900# menu, nothing changed. Today a system message appeared saying that the battery is degrading. Seeing that still nothing changed, I wiped the cache from the recovery menu, but it still seems to have done nothing. Has anyone else encountered this and found a solution? I read on XDA that a solution might be in rooting the phone, changing some files and flashing back to stock, so it resets the battery life to 100%, but this seems like a stupid solution to such a simple problem, if it were some other phone i would perhaps do it, but considering it's a Samsung, rooting will make me lose a ton of features I wouldn't want to lose.

⟐ Commented March 05, 2026 at 9:05 MST

Samsung Galaxy Note 20 Ultra: New battery is not recognized as new, same voltage and capacity

Wed, 04 Mar 2026 19:37:52 -0700

Hi!

Problem: Got my new battery for Note 20 Ultra from IFixIt, phone does not seems to notice it have new battery and still charges it to exactly same capacity\voltage point as old one (~4.35v and about 3750mAh, instead of 4.45v+ and 4200-4300+mAh)

What I have tried already:

Recalibration method written on package (discharge to 0, charge to 100 + 2hrs, discharge),
Tried resetting battery stats (*#9900#),
Wipe cache partition and all that. Code *#0228# does not work after some android update...
Tried all tips and tricks from local AI assistant.
Tried to disconnect the battery, boot up using cable, reset battery stats and boot in recovery to wipe cache, then disconnect the cable and wait for a few hours with no power connected to phone circuit.

What I am left with: Nothing works. It just continue to behave like it's an old battery. The only solution seems like - going to Samsung service, but their price for using their software to reset calibration data could be as high as my new battery or even more (that's what local IFixIt AI assistant told me).

There is still factory data reset, but Ai assistant told me that calibration data is probably held in NVM cell that is not accessible by normal user means, (I had same experience with my old Note 4 - data reset didn't help there either)

I don't mind trying service and pay some amount for their help, since that is probably the only way left, just wanted to ask IFixIt for help first...

In the end I put back my old battery, it holds very well still so there is no problems in that regard. Just want to find a way to use my new battery at it's full capacity.

What I am looking for if you have any idea: Any other ideas apart from what I have described already.

May be you had similar experience and you can confirm that going to Samsung or any other phone service working with Samsung phones can help.

Anyways, will be glad to hear any ideas or potential solutions, especially if they are based on your actual experience with similar situation.

Thank you!

⟐ Commented March 04, 2026 at 19:37 MST

Samsung Galaxy Note 20 Ultra: Wont show logo after (strangely short) 100% charge/Black SCREEN

Sat, 07 Feb 2026 18:48:55 -0700

Hello

I have a Samsung Galaxy Note 20 Ultra.

I went to use it last night and it was flat, that's not abnormal for the phone, not a regular daily situation but not abnormal.

I started it charging. AFTER a bit of online browsing I went to check how far through it was, expecting to see maybe 20-25% and it said 100%.

I unplugged it from charger, attempted to switch it on but it wouldn't switch on (relatively short press on power button did nothing).

Any combination of(no i didn't try them all together) lengthy over 7 seconds, power and down volume OR power and up volume OR very very long power only gets a tactile feedback vibrate but the screen doesn't bring up a logo, it just seems to remain dark.

EDIT: I am not sure if I should be seeing any lights on it elsewhere, if there should be, it doesn't show any. Oh and plugging it back into charger doesn't show anything any more as regards battery.

Can someone please assist, I quite liked the phone and don't want to have to bin it, its also got quite a bit on and its what I use for online spending.

⟐ Commented February 07, 2026 at 18:48 MST

Samsung Galaxy Note 20 Ultra: What is this square thing?

Tue, 27 Jan 2026 08:40:14 -0700

What is this black square inside phone?

⟐ Answer accepted January 27, 2026 at 8:40 MST

Samsung Galaxy Note 20 Ultra: Screen only responsive to S-pen on Samsung Note 20 Ultra

Tue, 18 Nov 2025 02:06:03 -0700

The top half will not respond to touch except its just fine when I use the S-pen. Unfortunately cant find the S-pen. (arggh!) Whats wrong, what can be done?

⟐ Commented November 18, 2025 at 2:06 MST

Samsung Galaxy Note 20 Ultra: Replaced battery, worked fine over night, in the morning screen dead

Tue, 11 Nov 2025 01:04:14 -0700

Hello, bought an IFIXIT replacement battery for my Galaxy Note 20 Ultra and replaced it yesterday. Everything worked fine in the evening and today in the morning, but then my screen started to flicker. I used it for a couple of minutes and then locked the phone. A couple of minutes later I picked it up again, and the screen was all white, tried to unlock, pushed some buttons and then it went black and thats it.

Screen is dead. What could it be? Could this be the batteries fault, maybe overvoltage caused this?

Now I can't access my phone, not even over a hub with an external monitor because it's locked and I can't unlock it.

⟐ Commented November 11, 2025 at 1:04 MST

Samsung Galaxy Note 20 Ultra: How to change phone color in about phone?

Thu, 02 Oct 2025 11:56:00 -0700

I changed my back to an other color, looks wonderful but I wonder if there is any way to change the phone color in about > phone, maybe some kind of system patch or something that can allow me to change the color.

Samsung Galaxy Note 20 Ultra: I cant chart with voice not what is a reason behind?

Tue, 04 Mar 2025 21:05:21 -0700

I cant chart with voice not what is a reason behind?

Samsung Galaxy Note 20 Ultra: Why won't my Note 20 Ultra get service?

Sun, 26 Jan 2025 13:04:20 -0700

My phone(N20U Exynos) isn't receiving a signal, so no calls/SMS/Data or even Emergency. According to *#0011#, it's telling me that 2 parts have gotten bad.⏎ but I have no idea what these 2 parts are, and idk where they are(remember, I am on Exynos and my motherboard parts are different than the iFixit teardown of the N20U)

⟐ Answer accepted January 26, 2025 at 13:04 MST

Samsung Galaxy Note 20 Ultra: لماذا تظهر خطوط على الشاشة

Sun, 12 Jan 2025 12:41:14 -0700

سقط هاتفي من مسافه ليست كبيره ومن بعدها ظهر خط وردي في الشاشه كيف اعمل للأخفاء هذا الخط من الشاشه

⟐ Answer accepted January 12, 2025 at 12:41 MST

Samsung Galaxy Note 20 Ultra: S Pen Detected Disconnects when Removed

Fri, 20 Dec 2024 02:37:09 -0700

The S Pen connects normally with the phone when it is inserted but after 2-5 seconds of being removed it disconnects and has to be reinserted. Battery shows 100%.

Samsung Galaxy Note 20 Ultra: My mobile data (4glte / 5g) has quit working

Tue, 29 Oct 2024 07:27:47 -0700

I've reset the network w/o success. I removed the rear cover and the moisture indicator is blue & the lower moisture indicator on the speaker module is red. I don't see any signs of water damage and the phone has never been submerged in water.

Any thoughts on what the issue might be. I plan to replace the battery while the phone is open. Which pcb contains the 4g /lte / 5g chips? I would replace them if I can find them online for a reasonable price.

Great site, thanks in advance!

-Jim

Samsung Galaxy Note 20 Ultra: I change the Battery, the USB port and it still doesn't charge

Tue, 13 Aug 2024 02:23:32 -0700

What else do I have to do for it to be charged fully I already put in a new battery and changed the USB port.

⟐ Answered August 13, 2024 at 2:23 MST

Samsung Galaxy Note 20 Ultra: app that can't be deleted

Sun, 04 Aug 2024 09:00:27 -0700

I have an app that can't be deleted. The option does not exist. It is not a system app.

How do I delete it?

⟐ Commented August 04, 2024 at 9:00 MST

Samsung Galaxy Note 20 Ultra: Just bought phone but it's locked

Thu, 15 Feb 2024 21:27:23 -0700

Just bought just bought the phone from a garage sale but it is locked how do I get into it

⟐ Commented February 15, 2024 at 21:27 MST

Samsung Galaxy Note 20 Ultra: Network problem how can I fix

Fri, 02 Feb 2024 01:48:38 -0700

I have network problem sometimes work and sometimes not i have change my sim card

⟐ Answered February 02, 2024 at 1:48 MST

Samsung Galaxy Note 20 Ultra: تحديث بيانات جهازي sm-n985f/ds Update my device data

Thu, 28 Dec 2023 06:06:34 -0700

تحديث بيانات جهازي

Update my device data

⟐ Answered December 28, 2023 at 6:06 MST

Samsung Galaxy Note 20 Ultra: USB port not working.

Fri, 22 Dec 2023 16:27:38 -0700

If I connect it to its (original) charger, it won’t charge unless I push it to a point where it stays connected.

What’s more, the original cable doesn’t seem to work at all, while the third-party cord I bought on Amazon has to be connected on specific side on both extremes, so despite being USB type-C to USB type-C, it’s no longer reversible.

⟐ Commented December 22, 2023 at 16:27 MST

Samsung Galaxy Note 20 Ultra: Part identification on Samsung phone

Fri, 22 Dec 2023 06:18:08 -0700

Does anyone know what the part circled in blue in picture below is called?

⟐ Answer accepted December 22, 2023 at 6:18 MST

Samsung Galaxy Note 20 Ultra: Why is my phone screen suddenly blacked and sometime

Fri, 20 Oct 2023 11:07:40 -0700

my phone is all fine for till it shows green line. but thats not the big of a deal. but suddenly my phone starts to black out. luckily i can access it with samsung dex and the touch screen seems fine. for sometime. and very rarely. the screen would come back to normal but only a few second. and starts blacking out. the phone black out only shows 1 green. thats how i knew its turned on or not. would like to hear your answer. [the screen was never cracked but only for 1 time it was dropped. it had no damage.

⟐ Commented October 20, 2023 at 11:07 MST