Idiots guide to mobile networks and data settings

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http://androidforums.com – Ok. Being new to Android and all, I am still working on finding the ideal settings on my phone. However: I am seriously held back by my lack of knowledge on all things android, and specifically network settings. Is there a member who can help me with, or point me to, an idiots guide to network and data things? What is the difference between different networks and how do apps use them? What does data transfer do exactly? I am baffled by questions like: does whatsapp work on 2G or not? I think I am not a complete idiot on all things tech, so "Dora the Explorer" explanations are not ne (General)