Weird knurling lines

[Arcam Storm]

I have had my S25 Ultra since launch day but have only just noticed the weird knurling marks on the sides, top and bottom edges. There at two on the charging port edge, two on the button edge, one of the top edge and one on the opposite side to the button edge.

I won't see them once the case it fitted, but does anyone have a definitive answer as to their purpose please?

[ChristinaMG2604]

You mean the phone antenna?

[Caswallawn]

If you mean the little plastic strips in the frame they are the various antenna.

[HarryBlox]

Are they stripes on the bottom going from front to back equal distance apart and the same on the top but different distances apart width ways? It's either a design concept or could be the antenna or alike.

[BandOfBrothers]

Hello 👋 @Arcam Storm and Welcome to the Samsung Community Forum. 

Could you possibly take some photo's of this and upload them here in your thread please. 

[lminvti]

Hi @Arcam Storm and warm welcome 👋

The frame of the phone is used for various antennas. The bands between them keep them separated.

[Arcam Storm]

Yes, those are they <g>, on my black phone they are dimpled and you can feel them under your nail, I will upload some pics shortly but your pic does show the two on the bottom but yours look smooth.

[Arcam Storm]

I have no why of knowing if that is what they are, that is why I am asking here, pics will be uploaded shortly.

[Arcam Storm]

They don't feel like plastic to me but I may be wrong, they are dimpled and feel like those dimples are punched directly into the frame.

[Arcam Storm]