GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.
NanoReview - Most advanced CPU and SoC comparison
Productz.com - Crowdsourced products database
Versus - Find popular alternatives to anything in a jiffy
phonearena - PhoneArena is a premium site for new wireless data, for example, full determinations, top to bottom surveys and the most recent news.
Will my phone work - The site answers the question, will my mobile phone work with a certain mobile carrier?