Why Iphones have White lines on its Backside.

Today i am going to tell that, why iphone has white lines on its back side. Everyone thoughts that it is a design but
exactly it is not a design.
The screens of the new Iphones were bigger than previous Iphones and also lighter than previous Iphones.

  But not notably, unlike earlier Iphones, which had pannels on the back made of ceramic and glass, the case of the new Iphone
   was madely entire aluminium, save from some thin, plastic-like lines that run across the phone at the
   top and bottom of the Iphone.

 These lines always white while the Iphone has the another color like- gold, grey, silver etc.

 Apple wouldn't tell tech inside the purpose of these white lines, finally these lines are
 antena for recive the signal.

This is the line.


      Old Iphone                 New Iphone

To learn more, we reached out to Jeff Snyder, the director of marketing at iFixit, a company that sells tools and parts and provides repair guides for people for how to fix their gadgets. iFixit is also known for doing teardowns — taking apart and posting the pictures — of new gadgets. 

Here's what Snyder said about those lines on the iPhone:

We believe that the lines/bars on the outer case provide a clean escape route for the signal to get through the case.

The iPhone 5 and 5s had glass sections on the back, both top and bottom, for the same reason—and the iPhone 4 and 4s had glass backs. 

Apple is likely looking into ways to eliminate this design feature from future iPhone models. The company filed a patent earlier this year for a composite material that will allow radio signals to escape.