not mommy related

This post isn't mommy related or anything like that; 
The phone I'm currently using right now is iPhone 6s Plus I've had it for almost 2 years, I bought it off of someone of the internet. It's not unlocked at all, sadly and I'm transferring phone companies to AT&T I'm just wondering what's a good phone? I just can't seem to choose as there is so many. 
I hope you all don't mind this post, I just need some help from you ladies. ☺️