Considering switching over to an android phone. I have a few questions on customization. How customizable are notification sounds? I have 4 different email accounts, 2 work, 2 personal and I want to have a different notification sound for each account. Would it depend on the phone, or the version of Android installed, for me to be able to do that? Is there a preferred audio file format for custom ringtones and sounds, or is mp3 suitable? How easy is it to manage storage, customize whether apps, data, pictures etc. are stored on the phone's memory or sd card? I use Nokia's Here Drive mapping app and am able to download specific state maps of the states I frequently drive in so I don't have to use data when traveling. Does the google maps app have a similar feature, or do you recommend a different mapping app that would serve that purpose?