changing colour of iPhone glass

I have cracked both the front and the back of my iPhone badly and I'm looking at buying replacement glass for it. I currently have black glass on my iphone and would like to replace it with white.

As a result of dropping my phone then cracking the screens, I think I may have damaged the arial, I don't get or have less signal then what I used to, also my phone struggles to pick up wifi even if I am close to the router.

I spoke to my network and they said to get anything internal repair I must get the screens fixed but that is not covered in my warrenty. So I have found replacement glass in white and I am wondering if I change the colour of my iPhone, will I still be able to get my arial fixed in an apple store or by my network?

My other option is to claim on my insurance and get a replacement phone that way, however I am unsure if they will due to the cracked screens.

Am I better of replacing the screens with new black glass or am I able to change the colour?

Thanks