It's possible, but event then you can get the skin on more than one account on the same device. I know there is a limit, but I think it's like 4 or 5 different accounts to one device. You can always reach out to Epic to see what the exact limit is.
The problem is that I tried to get the promotional skin by doing all the steps properly, and It's one per device (I checked with Epic Games already [and they by far have the worst customer support I've ever had the displeasure of using]) waited for well over 48 hours and received not a glance of it nor an approval email.
Odd, you should be able to get it. When did you get the phone?
I'm in the same boat. Got my phone Thursday, followed all the steps to a T. I finished my 3 matches 4 days ago now. Still no gaxy skin.
No one else I know had this issue. They all got their skin within the first 18 hours after playing their 3 matches.
The only difference between what I've done and what they've done is that Season 6 went live in Fortnite.
Whether it's just coincidence or the root of the problem as to why none of us are receiving our skins since Season 6 launched, someone somewhere needs to figure it out and get it fixed.
I'm in the same boat, it's been 4 days and still nothen on my end. I reached out to customer support and they said 24 to 48 business hours so more than likely the weekend doesn't count torwards the time.