droid user here haven't upgraded in a long time because verizon wants to take away my unlimited data (assholes) but the phone i have been looking at is the s4. the new soon available s5 also looks interesting but i will have to wait and see. verizon has recently had to offer new packages/plans lower prices (or so they say) might be worth a look. usually family plans offer the most bang for the buck. the best coverage depends on where you live but it seems that verizon does have the best overall coverage, at least here in SoCal. your best bet is to check costumer reviews and family/friends take on their service to see which carrier works well in your area. costumer service is huge and sprint always comes in dead last in that area. google is a good research tool.