What is the best mobile phone ?

The one you have,
as opposed to none at all.

iPhone 6s obviously!!!

iPhone 6s or iPhone SE. Both are fast but have terrible battery. The Samsung edge has great battery. The blackberry priv has amazing security systems but no good apps. It depends what you want to get. I reccomend samsung because its less expensive, fast and battery efficient. DON'T GET THE BLACKBERRY. the iPhones are quite popular but are they really worth buying? The world is all about branding these days.