Green Line on Phone: Causes, Fixes, and My Personal Experience

If you’ve suddenly noticed a green line (or multiple green/blue lines) appearing on your phone’s display, you’re not alone. Many users, especially those with flagship or flagship-killer phones, have reported this issue. I personally faced this problem with my Samsung S21+, and in this article, I’ll share my experience, the possible causes, and the steps you should take before replacing the display.

What Causes the Green Line Issue?

There are two main reasons why a green line may appear on your phone screen:

1. Physical Damage (Display Hardware Issue)

• If you dropped your phone or it experienced a strong impact, the display might be physically damaged.

• Unfortunately, in this case, the only solution is to replace the display.

2. Software or UI Glitch (Common in Flagship Phones)

• The problem I faced was different—I never dropped my phone, but a green line suddenly appeared.

• This issue mostly affects flagship models, including Samsung, OnePlus, and iPhones.

• It is often a software or UI glitch caused by a firmware update or display driver issue.

• Many users have found this problem appearing after a software update.

Solutions: What to Try Before Replacing the Display?

If your phone has not been dropped, try these steps before opting for a display replacement:

1. Reboot Your Phone

Sometimes, a simple restart can fix the issue if it’s a temporary glitch.

2. Update Your Phone Software

• Go to Settings > Software Update and check if an update is available.

• If your phone is new, manufacturers might release a fix in an upcoming update.

• If your phone is old and no longer receiving updates, you may need to visit a service center.

3. Check in Safe Mode

• Boot your phone into Safe Mode (press and hold the power button, then long-press “Power Off” and tap Safe Mode).

• If the green line disappears, the issue may be due to a third-party app or software bug.

4. Contact the Authorized Service Center

If none of the above solutions work, take your phone to an authorized showroom or service center.

Important Tip: If your phone is under warranty and the green line appeared due to a software bug (not physical damage), you should be eligible for a free display replacement.

Do not pay for a display replacement if the issue is caused by a software glitch—fight for a free repair under warranty!

Final Thoughts

The green line issue can be frustrating, but before replacing the display, try the above solutions to see if it’s a software-related problem. If your phone is new and under warranty, don’t let the service center charge you for something that isn’t your fault.

Have you experienced this issue? Let us know in the comments below!