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Samsung Galaxy S21 Ultra Repair Forum

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Samsung Galaxy S21 Ultra questions

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3 Answers

Dropped phone in salt water pool - melted this bit, what is it?

accepted Samsung Galaxy S21 Ultra 3 Answers

Dan P 23

Commented

Mar 28, 2026

commented Mar 28, 2026 by Dan P

2 Answers

Replaced the battery with an iFixit one and Battey life is worse

accepted Samsung Galaxy S21 Ultra 2 Answers

Jerry Wheeler 92.2k

Commented

Mar 25, 2026

commented Mar 25, 2026 by Jerry Wheeler

0 Answers

Wi-Fi and Bluetooth Randomly Turning Off on Samsung Galaxy S21 Ultra

unanswered Samsung Galaxy S21 Ultra 0 Answers

Anh Bùi Hữu

Asked

Mar 21, 2026

asked Mar 21, 2026 by Anh Bùi Hữu

4 Answers

Loses Cell Signal After Screen replacement

accepted Samsung Galaxy S21 Ultra 4 Answers

Tarik

Commented

Jan 29, 2026

commented Jan 29, 2026 by Tarik

1 Answer

Can internal storage be upgraded within?

Samsung Galaxy S21 Ultra 1 Answer

teardown-er 1.2k

Answered

Jan 13, 2026

answered Jan 13, 2026 by teardown-er

1 Answer

Why Green line came on the screen?

Samsung Galaxy S21 Ultra 1 Answer

DanJ 499k

Answered

Oct 26, 2025

answered Oct 26, 2025 by DanJ

0 Answers

Screen working inconsistently after battery replacement

unanswered Samsung Galaxy S21 Ultra 0 Answers

Richard M

Asked

Sep 24, 2025

asked Sep 24, 2025 by Richard M

0 Answers

Always writing no sim card

unanswered Samsung Galaxy S21 Ultra 0 Answers

pikudo 1.1k

Commented

Sep 19, 2025

commented Sep 19, 2025 by pikudo

1 Answer

phone keeps turning off and on, getting fairly hot.

accepted Samsung Galaxy S21 Ultra 1 Answer

Justin Bass 11

Commented

Sep 17, 2025

commented Sep 17, 2025 by Justin Bass

2 Answers

3U Tools but for Samsung

Samsung Galaxy S21 Ultra 2 Answers

Burhan

Answered

Sep 9, 2025

answered Sep 9, 2025 by Burhan

1 Answer

My phone gets hot while charging, is it normal or a battery problem?

accepted Samsung Galaxy S21 Ultra 1 Answer

Richard Schofield

Commented

Sep 3, 2025

commented Sep 3, 2025 by Richard Schofield

0 Answers

Main ribbon cables installed upsidedown

unanswered Samsung Galaxy S21 Ultra 0 Answers

Corey Gough

Commented

Aug 1, 2025

commented Aug 1, 2025 by Corey Gough

2 Answers

Screen failure after battery replacement

Samsung Galaxy S21 Ultra 2 Answers

Rich

Answered

May 27, 2025

answered May 27, 2025 by Rich

0 Answers

All cameras failed after rebuild

unanswered Samsung Galaxy S21 Ultra 0 Answers

Thomas Hayes

Edited by author

Apr 26, 2025

edited by author Apr 26, 2025 by Thomas Hayes

5 Answers

I have a camera failure on an S21 ultra after screen replacement?

accepted Samsung Galaxy S21 Ultra 5 Answers

Thomas Hayes

Commented

Apr 23, 2025

commented Apr 23, 2025 by Thomas Hayes

0 Answers

Screen turned on once and never again

unanswered Samsung Galaxy S21 Ultra 0 Answers

Francisco Fonseca

Asked

Apr 19, 2025

asked Apr 19, 2025 by Francisco Fonseca

0 Answers

Why is my phone isn't answering to wired earphones

unanswered Samsung Galaxy S21 Ultra 0 Answers

Mohamed Bashiir 13

Asked

Mar 13, 2025

asked Mar 13, 2025 by Mohamed Bashiir

0 Answers

How unlock PIN code on safe mode

unanswered Samsung Galaxy S21 Ultra 0 Answers

Anas omer

Asked

Feb 21, 2025

asked Feb 21, 2025 by Anas omer

0 Answers

Shattered Back, Reboot Loops, and SIM Issues. Can My Phone Be Saved?

unanswered Samsung Galaxy S21 Ultra 0 Answers

jayeff 535.1k

Commented

Jan 23, 2025

commented Jan 23, 2025 by jayeff

1 Answer

Size of screws for Samsung Galaxy S21 Ultra 5G, SM-G998B?

Samsung Galaxy S21 Ultra 1 Answer

Danny

Commented

Jan 1, 2025

commented Jan 1, 2025 by Danny