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Today, you can buy 5 quad-core smartphones. 7 months ago, there was just one, and only if you bought the international version, which lacked a 4G LTE radio.

But don't feel bad if you have a dual-core device. Not all quad-core is created equally.
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I just wanted to compliment you, Jessica, on being a great tech reporter and one of the very best in the world of smartphones. I always enjoy your reviews and articles, insightful as this one is. Keep up the good work! 
That was a really nice piece of writing. I feel informed and entertained.
Why, thank you! I'm glad you enjoyed it. I really love writing columns like that. And I take topic suggestions!
Well, +Jessica Dolcourt , since you're taking suggestions, the obvious favorite would be batteries. What is the science/chemist behind modern batteries and why isn't there the same degree of improvements as there is in processors or screens? What companies are investing R/D dollars on battery improvements? What are those improvements likely to be? 
Reminiscent of CNET's dual core article from last year. Wonder what 2013 will bring us with cores.
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