Quick question for you android folks. Is there a difference between the Nexus 5 sold by Google vs the Nexus 5 that T-Mobile sells? I found a guy on craigslist that is selling his T-Mobile Nexus 5 for $300 and I'm interested. However, I'm hoping its identical to the one sold by Google. I'm an AT&T customer and I would want it to work on their network and get the updates from Google easily. I'm brand new to android (been an iOS user since 2007). I would appreciate your help, thanks in advance.