For my iPhone should I do this?

Glow up back (apple logo)

Like this v
http://www.redmondpie.com/make-apple-logo-on-iphone-4s-iphone-4-glow-with-this-kit-can-be-installed-under-5-minutes-video/

Why would you ask us? It's YOUR phone.

If you think you have the mechanical skills, and you want to, go for it.

There's not need to do the mod on your iPhone. You can get flashing cases so you don't have to open the phone up and fiddle around