You want best smartphone, right? The definition of best smartphone is not certain because "best smartphone", a smartphone is absolutely dependent upon the users activity.
Each user prefers different specifications when thinks of buying smartphone, although smartphone maker companies taking care of your requirements, but they can't put all specifications equally in a mobile.
So, here are some ways to decide, which smartphone to buy that suits user's activity best, whether it's about battery or camera or something else.
Which Smartphone to Buy
1. If you want a Yacht, Nexus 6. Slightly smaller yacht, Note 4.
2. Battery: Droid Turbo
3. Camera: LG G3
4. Utilitarian value (Removable battery, expandable memory, etc): Galaxy S5
5. If you're a diver: Xperia Z3
6. If everything you own has a fruit on it, you wear yoga pants, fake glasses, and look forward to "sweater weather," : iPhone 6
7. If the above option appeals to you, and you have large pockets, and a large bank account: iPhone 6+
8. If you want superb build quality and unparalleled sound: HTC one m8
9. If you want a flagship phone in a non-gigantic size: Xperia Z3 Compact
10. If you're on a budget: Motorola Moto G
11. If you like customization: Motorola Moto X 2014
12. If you like customizable software: OnePlus One
Note: No. 6 & 7 points are for Die hard fan of Apple(iPhone)
That's about all I have off the top of my head. In case, I missed some user requirements, or you have better option than above-mentioned smartphone then let me know in comments.
