I bought my Z flip 4 from the Telstra shop in Canelands shopping complex in Mackay in August, 2022. It had a 2-year warranty. By March, 2023, I noticed a grey smudge creeping across the crease from right to left. This completely involved the crease by April. I could see that the screen protector had come off the screen along the crease.
I took it to the Telstra shop, where i found that the boundless enthusiasm to sell me the phone had been replaced by complete indifference. This is what happened...
• The arrogant prick of a manager told me that it was a screen fault, and that there was NO screen protector, even though you could see where it lifted. You can also see it at the screen camera cut-out.
Now get this.
• Arrogant disinterested manager said I had 3 options:-
1. Buy a new phone at a discounted price of $900.
2. Have the screen repaired repaired for $900.
3. Leave the store!
I think i said something uncomplementary about both him and his service, and, after being admonished for using "profanity" in his store, I left.
I sent the z flip 4 to Samsung, for a free screen protector replacement (anything else, I was told, would void the warranty).
A week later, I had it back as good as new. Samsung give 2 free screen protectors in first 2 years.
December, 2023. Screen protector lifting off crease again, with a grey smudge across the crease.
This time, I pulled the screen protector off, very easily done, and have been using the phone without s screen protector ever since.
So, after 3 weeks, there are no marks at all on the screen, and it works perfectly.
I told a phone dept manager at Harvey Norman about the Telstra debacle and he told me that, had I bought it at HN store, they would have sent it to Samsung for me, and provided a replacement phone until I got mine back.
Lesson learned...
1.Do NOT buy anything from the Telstra store at Canelands in Mackay.
2. The phone is fine without a screen protector. I'll do another report after 6 months, and advise progress.
I hope this helps.