Sony Xperia Z3 & Z3 Compact. I use one for work and one for personal use. Both are on T-Mobile, in the U.S. (Although T-Mobile briefly offered a branded Z3, mine are both phones I bought from Sony dealers.) Although three years old, they both still do all that I need a phone to do.
Are you still getting security fixes?
They stopped a little over a year ago
Used to have Samsung Galaxy S7, it had no problem and stable enough. Just had problem with 3rd party app's (instagram) freezing sometimes.
Just got an iphone7, so far so good!
Camera-wise, I would like to say S7 was better.
Nexus 5X. I'm probably going to get a new phone before the end of the year because this one just isn't working very well anymore.
I think I'm going to buy my first iPhone.
iPhone 7 Jet Black base. I was originally going to skip the iPhone X but I think I might order soon / whenever stock catches up to demand and I can just make an impulse purchase walking by T-Mobile in the mall, lol...
Nokia 3310. I don't change phones until they die on me.