Why not just buy an iPhone? Compared to a 2006 laptop, a 2015 smartphone features superior hardware specs, all-day battery life, and will fit in your pocket.
But if you really want to install Linux on your Intel Macbook, I think it can be done. Here is some good information from the Ubuntu help page, for example: https://wiki.ubuntu.com/MactelSuppor...unityHelpPages
If you use a different distro other than Ubuntu, then try googling "fedora wiki intel mac" or "arch wiki intel mac" for example.