What are those white lines along the edge of the s10?

[ujjc001]

I happened to notice these whiteish lines along the edge of the phone. Two along the bottom, symmetrically positioned, one also the right side above power button, one on top near the sim/SD slot, one along the left side above volume button which seems thicker than the other side one...I've never noticed these in any other galaxy, though, I've never checked either. What are they? Why would the case not be solid and unbroken? Are they some sort of sensors?
Trying to include pictures, not sure it's working...

 

[ujjc001]

Here we go

 

[mustang7757]

I happened to notice these whiteish lines along the edge of the phone. Two along the bottom, symmetrically positioned, one also the right side above power button, one on top near the sim/SD slot, one along the left side above volume button which seems thicker than the other side one...I've never noticed these in any other galaxy, though, I've never checked either. What are they? Why would the case not be solid and unbroken? Are they some sort of sensors?
Trying to include pictures, not sure it's working...

Those are antennas for reception

 

[ujjc001]

Well, that was easy! Thank you!

 

[mustang7757]

Well, that was easy! Thank you!

Your welcome!