TL;DR
This phone is amazing. In all reality, the only con is the screen brightness in the sun, but I can deal. I've been using it for a month or so now alongside Tasker and Lightning Launcher Extreme and couldn't be happier.

-This phone is possibly the best phone I've ever had. The fact that it's unlocked gives it much more prestige.
-It is an incredibly snappy phone.
-It fits in my pocket and I can use it comfortably with one hand!
-The android update (Android 10) gives it great support with apps.
-Using it with the AT&T Bring Your Own Phone sim kit with Straight Talk and the service is awesome.
-The smaller screen may seem like a bad thing but you can binge Twitch, YouTube, playing games...anything for hours because the phone has less pixels to push AND it has a decent size battery (4300mAh).
-Speaker is nice and loud if you need it to be (usually I don't and have it at 50-75% even for alarms and such).
-The stock alarms are a great collection of birds chirping, water sounds and noticeable chimes.
-The device handles heat very well. Spent 3 hours driving with it mounted to the windshield while it was hot out and had no AC and the device didn't even slow down or drain extra battery while using the GPS.
-I've dropped the phone by accident a few times now and the phone hasn't seemed to be affected by it.
-The quick charge is another awesome thing with this phone AND it uses USB 3(I know a lot of phones have this, but still a great plus).
-I've already gotten used to the red "intelligent button" on the side and have switched around the actions a little to make using it easier for myself.
-The NFC chip is very quick as well.
-The Intelligent Assistant has a bunch of great things that give the phone greater quality of life changes such as the app blocker, which has 4 options for EVERY app (Boot Locker, Start Blocker, Background Blocker, and Background Cleanup). Definitely look into this part of the assistant if you want to maximize your battery life. (I can use my phone regularly for 3 days without having to charge.)
-I don't have any bluetooth or wifi issues.
-I haven't used the headphone jack or radio yet.

I really can't think of any notable cons. I absolutely love this phone. If this changes in the future, be sure I'll update my review once again.

perfect size fits pocket -Had no problems everyday use

Really impressed with the device overall, the "on board" UHF analogue and DMR radio works really well - particularly for amateur radio and PMR. Only disappointment is the camera, which despite a phenomenal 48mp sensor is let down by poor software.

The ATOM XL I find that it is everything I like about it , not to big its rugged, to me its the perfect phone and does what I need and more.

I wanted a smaller, robust phone and this ticks all the boxes. Mainstream phones have all increased significantly in size as people use them as a one stop media device. I needed to get away from the bulk of current phone offerings but still retain smartphone functionality. This coupled with a high quality, solid build and excellent battery life makes for a perfect day to day phone.