I want to buy a iPhone 5 but I have a few questions..... I am not a gamer and only use my phone for email, internet, some texting (not heavy texter), watch YouTube videos, and photos (store and take). Verizon, Sprint, AT&T, Walmart, or Best Buy? What carrier should I sign up with? How much data do I need per month just to browse internet, send emails, and watch You Tube vids. 16GB or 32GB? Black or White? 4S or 5? Estimated cost per month to own iphone? Anything else to add?