A vertical green line on your phone's screen can be frustrating, especially when your display was working fine before a software update. If you're facing the Galaxy S21 FE green line issue, you might be wondering whether restarting your phone will fix it, whether you need a screen replacement, if Samsung will repair it for free or you need to sell it.
The problem can sometimes appear after a software update, but that doesn't necessarily mean the update caused it. A persistent green line often points to a display hardware issue. Before spending money on repairs or deciding what to do with your phone, there are a few checks you can try.
Also Read: OnePlus Phone Green Line Issue? Here’s How To Sell It Without A Big Loss
What Causes The Galaxy S21 FE Green Line?
The Samsung Galaxy S21 FE uses an AMOLED display. If something goes wrong with the screen panel or its display, you may notice a thin green line running vertically across the screen. It can remain visible while you're using different apps, watching videos, or browsing the internet.
There are a few possible reasons for the Galaxy S21 FE green line issue.
Display hardware problems: A green line can indicate a fault in the display panel or the circuitry responsible for displaying images. Your phone may otherwise work normally, with calls, apps, and touch controls functioning as usual.
Heat during heavy use: Your phone can heat up while charging, gaming, or installing updates. Heat can put stress on electronic components, potentially making an existing weakness more noticeable. However, normal heating doesn't automatically mean your screen will develop a green line.
Problems noticed after an update: Some users notice the line after installing a software update or security patch. The timing can make it seem like the update caused the problem, but it doesn't prove that software is responsible. A persistent line is often a sign that the display needs to be checked.
How To Fix The Galaxy S21 FE Green Line Issue
Before taking your phone for repair, try a few basic checks to fix your Galaxy S21 FE green line issue. These can help you understand whether you're dealing with a temporary glitch or a problem that needs professional attention.
Restart your phone. Turn your Galaxy S21 FE off and restart it. Once it boots up, check whether the line is still visible. A restart can clear temporary software glitches, but it won't repair a damaged display.
Check different screens. Open different apps and switch between light and dark backgrounds. If the line stays in the same position across the screen, a hardware issue becomes more likely.
Try a display test. On supported Samsung devices, dial *#0*# in the Phone app to access the hardware test menu. If it works on your phone, select the red, green, and blue screen tests and check whether the line remains visible. The code may not work on every device or software version.
Try Safe Mode. Safe Mode temporarily disables downloaded apps. If the line disappears, a software or app issue may be worth investigating. If it remains, the display may have a hardware fault.
A factory reset should be your last troubleshooting step. Back up your data first, and remember that resetting your phone is unlikely to fix a faulty display panel.
Does Samsung Offer Free Screen Replacement For The Galaxy S21 FE?
If the green line appeared suddenly on your Galaxy S21 FE, you may be wondering whether Samsung will replace your screen for free. Samsung has offered free or goodwill screen replacement programmes for certain Galaxy models in some markets, but eligibility can depend on the device, region, warranty status, and current service policy.
Don't assume that your Galaxy S21 FE automatically qualifies for a free replacement.
Contact Samsung support or visit an authorised service centre to have the phone inspected. Carry your purchase invoice if available, and ask whether any replacement offer applies to your device.
The service centre may check the phone for physical damage, cracks, or other signs of impact before deciding whether the repair is covered. If the replacement isn't free, request a repair estimate before agreeing to the work.
Also, compare the repair cost with the phone's current value. If the screen replacement is expensive and your phone has other issues, spending more on repairs may not be the best option.
Should You Repair Or Sell Your Galaxy S21 FE With A Green Line?
If the Galaxy S21 FE green line issue doesn't go away, you have two main options: repair your phone or sell it and put the money towards another device.
Repairing the phone may make sense if everything else works well and the screen replacement is reasonably priced. However, if the repair costs a significant amount, you may prefer to put that money towards a replacement phone instead.
Before deciding, consider the battery condition, overall performance, storage, and any other problems your Galaxy S21 FE has. A repair quote alone won't tell you whether keeping the phone is worth it.
Also Read: Moto Edge Vs Moto G Series Resale Value: Which Pays More?
Can You Sell A Galaxy S21 FE With A Green Line on Cashify?
Yes, you can check the selling options for your Galaxy S21 FE on Cashify, even if the screen has a green line. The final offer will depend on the phone's condition, the damage reported, and the inspection.
Here's how you can check its value:
- Visit the Cashify website or open the Cashify app.
- Go to the Sell Old Samsung Phone section and select the Galaxy S21 FE.
- Enter the requested details about the device's condition.
- Make sure you disclose the green line or display problem when describing the phone.
- Check the estimated price and follow the steps provided to complete the process.
The amount you receive may be lower than what you'd get for a phone with a fully working screen. The final price can also depend on other factors, such as physical damage and battery condition.
You don't need to replace the screen just to explore your selling options. Compare the estimated selling value with the repair quote first. That way, you can decide whether repairing the phone or selling it in its current condition makes more financial sense.
Before handing over your device, back up your data, sign out of your accounts, remove your SIM card and memory card if present, and perform a factory reset after confirming that your important files are safely backed up.
Final Thoughts
The Galaxy S21 FE green line issue can be worrying, especially when it appears after a software update. Start with a restart and a few basic display checks. If the line stays in place, get your phone inspected instead of repeatedly resetting it or trying unverified fixes.
Ask Samsung about warranty coverage and any current screen replacement offers before paying for repairs. If the cost is too high, compare it with your phone's current resale value and check what you could receive for selling it on Cashify.
Once you know the repair cost and selling value, you can decide whether to keep your Galaxy S21 FE, repair its screen, or move to another phone.
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