iFixit - Answers With Device "Samsung Galaxy A21"

Samsung Galaxy A21: I plug c power into the a21, I get a logo for a second then nothing.

Tue, 10 Mar 2026 04:08:20 -0700

Flashed logo then nothing. Repeatedly.

Samsung Galaxy A21: How to disable the sim of this phone when it is PUK locked

Thu, 08 Jan 2026 06:05:38 -0700

I accidentally activated Sim lock but although I have my Sim card holder the PUK code isn't working

⟐ Answered January 08, 2026 at 6:05 MST

Samsung Galaxy A21: How much cost of samsung galaxy A21 display cost

Sat, 11 Oct 2025 06:54:35 -0700

My mobile display black out so change my display

⟐ Answered October 11, 2025 at 6:54 MST

Samsung Galaxy A21: Black screen but phone is working

Wed, 12 Feb 2025 16:54:32 -0700

My screen went black and I can hear it turn on so I think it functions fine just can't see anything and the screens adhesive seems to have came out so the screen will kind of fall off

⟐ Answer edited February 12, 2025 at 16:54 MST

Samsung Galaxy A21: Why is there a padlock showing on my screen?

Wed, 20 Nov 2024 02:51:15 -0700

there is padlock sign showing on my screen, how do i get rid of it?

Samsung Galaxy A21: How do you replace a battery on a Galaxy A21

Sun, 04 Aug 2024 09:01:38 -0700

My Galaxy A21 needs to be charged twice a day.

⟐ Edited August 04, 2024 at 9:01 MST

Samsung Galaxy A21: My phone speaker is not working

Mon, 15 Jul 2024 11:10:40 -0700

My phone speaker is not working

⟐ Commented July 15, 2024 at 11:10 MST

Samsung Galaxy A21: front glass lens change

Mon, 17 Jun 2024 21:08:05 -0700

How do I change the front glass lens on my mobile?

⟐ Commented June 17, 2024 at 21:08 MST

Samsung Galaxy A21: Why my network work

Tue, 23 Apr 2024 06:16:53 -0700

My phone is asking for boost

⟐ Answer accepted April 23, 2024 at 6:16 MST

Samsung Galaxy A21: Why does my old phone not work when I charge it?(I had it since 2021)

Sat, 20 Jan 2024 14:55:42 -0700

I had my samung galaxy A21 since around 2021 and it stopped working for little until december 31st 2022 and it stopped working in May of 2023 and I couldnt charge it

⟐ Answer edited January 20, 2024 at 14:55 MST

Samsung Galaxy A21: Aux cable trapped in the aux cable hole

Wed, 17 Jan 2024 08:33:12 -0700

What will we do when aux cable trapped in the aux cable hole

⟐ Commented January 17, 2024 at 8:33 MST

Samsung Galaxy A21: Headphones connected but there's still sound coming out my speakers.

Fri, 01 Dec 2023 09:54:14 -0700

My A21s just started losing the sound from headphones completely, they are recognised as connected but audio is still playing through the speakers, Any help?

⟐ Commented December 01, 2023 at 9:54 MST

Samsung Galaxy A21: Why is my network not working

Wed, 27 Sep 2023 09:56:53 -0700

why is my network not working? and how to fix it

⟐ Answered September 27, 2023 at 9:56 MST

Samsung Galaxy A21: Samsung Galaxy A21 Smartphone. Trying to find new battery

Fri, 15 Sep 2023 08:09:41 -0700

I use a Samsung Galaxy A21 Smartphone. Trying to find new battery but the model that I enter does not come up. So can I use a SM-S21** number. I need SM-S215DL and the only number that comes up is SM-S215U** Can use the S215U apparently.

⟐ Answer edited September 15, 2023 at 8:09 MST

Samsung Galaxy A21: My phone went swimming, how can I power it up to back it up?

Thu, 15 Jun 2023 04:47:01 -0700

How can I bypass the battery long enough to do a back up?

⟐ Answer edited June 15, 2023 at 4:47 MST

Samsung Galaxy A21: Won't charge when I plug it in

Wed, 03 May 2023 16:16:44 -0700

What do I have to do to get my phone to charge? I've used brand new type C cords and it still will not charge.

⟐ Answer edited May 03, 2023 at 16:16 MST

Samsung Galaxy A21: Unresponsive touchscreen after LCD screen replacement

Mon, 03 Apr 2023 14:11:21 -0700

I recently replaced the LCD screen of my daughter's Samsung Galaxy A21 after she dropped it. Although the screen was shattered, after putting packing tape on it so she wouldn't cut herself she was still able to use it and the touchscreen was operable. After replacing the LCD screen (without frame), however, the phone boots up but the touchscreen no longer works. I've restarted it many times, checked the cables and battery connections, soft rebooted, hard rebooted and factory reset it...still no touch capability. So, I thought I maybe had a defective screen. I ordered a new screen, but before installing this second screen I decided to try plugging it into the back of the phone to test it and see if it worked. Again, this second screen boots up but the touch doesn't work.

Does anybody have a clue what is going on?

Thanks!

⟐ Commented April 03, 2023 at 14:11 MST

Samsung Galaxy A21: Volume Works in my speaker not in my handset

Fri, 17 Feb 2023 00:30:42 -0700

Volume on handset not working

⟐ Answered February 17, 2023 at 0:30 MST

Samsung Galaxy A21: Digitizer no longer works after screen replacement

Fri, 18 Nov 2022 12:53:31 -0700

Replaced the screen with two screens (with frame) and neither's digitizer work. I have been trying to find a schematic for it but all I can find shows only one side of the board, not both.

⟐ Commented November 18, 2022 at 12:53 MST

Samsung Galaxy A21: Fingerprint recognition stopped working?

Wed, 07 Sep 2022 20:29:27 -0700

Fingerprint recognition stopped working. Doesn't allow another to be added

⟐ Commented September 07, 2022 at 20:29 MST