Green Line S21 just happened today.

[Members_ecJqM6Y]

Have a similar issue with most people rite now. 
Green line just pop up without any notice...
I should have not update my phone just now.

I've read somewhere in reddit, the issue might not be because of the update. But it was due to the heat when updating the phone.
Lesson learn. I will be updating my phone in Alaska or in my fridge after this.

P.S. Does Samsung offer any screen replacement promotion same as before currently ?

[小天使]

Try to key in *#0*# and do the Red Green Blue screen test 1st. Sometimes it could be due to an App / Theme interference or the Device display developed fault. If there is no line during the test, meaning something is interfering with the device display. If it is permanent, that means the display developed fault (or as many claimed it happened after the software update, so.could be a corrupted software update file)

[JTPP]

same to my S21 Ultra after updating the greenline come out. Hope Samsung recalls back for screen replacement promotion again.

[MOD_02]

Dear Members_ecJqM6Y,

We understand you're facing issues on S21.

We encourage you to walk in to your nearby service center, our technicians will be more than happy to serve you.

Before you walk in, we encourage you to book appointment first before you attend to our service center.

https://www.samsung.com/my/support/mobile-devices/book-an-appointment/

Warm Regards,

Samsung Community

[tangcmin]

What they can help? Most of us facing the same issue.

[MefyTime]

Please take it to X (twitter) as well.
They wont do anything trust me
This is just them doing the SOP
The management is the one we should put pressure on

[스하위켛크분]

Dun change the screen better, waste money

Last year my s21+ having green line, replaced screen in June, then this year this month of August, green line happen again, just 1 year 1 month+ happen again

I not gonna replace screen again

Waste money and I suspect due to the device is overheat, because of the exynos chipset

Whenever on the phone, it heating.
This heating issue since happening after Android 13 update.