What kind of phone do you use?
I have a Samsung J3 Luna.
iPhone 6s. Still works perfectly.
Although Apple has been trying to push iOS 13 on me for months now and I refuse to upgrade. It’s my understanding it’s still full of bugs even at 13.3, and most of the new features are only for newer devices anyways.
Moto X4.
This, except I have the 6s Plus.
Samsung Galaxy A10
Unlocked
GSM -Android 10
iPhone 7+
I love it. It does everything I want. The screen is large, the battery lasts long and charges quickly, and the camera is great. I’m occasionally asked when I’m going to “upgrade”, as if I’m stuck with some clunker. I reply that I’m just fine the way I am.
I actually had a J3 for a while. Not a bad small phone (eventually the USB port died, and the external battery charger I bought took a couple of days to charge a battery.) Now, I use two–a Galaxy J7 Crown for a Wi-Fi only media viewer and a Moto G6 for actual phone calls and texts. (I really want one of the upcoming Galaxy S11s–will probably get it in the year 2525.)
Nothing fancy - some old Samsung flip phone.
(Also, waiting for the first poster to yell at clouds about not having or needing a cell phone at all.)
Retro! I love it! “Scottie, beam me up!” 
Me too. It cost $20. However it doesn’t make toast or feed the cat like them fancy smart phones do.
Just bought an iPhone Xs, to replace my old Android.
iPhone SE. I hate the larger sized phones, so that’s the perfect form factor for me. I had a 6 for awhile, and then I accidentally destroyed it, and when it came to replacing it, I downsized to the SE. The phone is kind of on its last legs, though. There’s rumors Apple may release an iPhone SE2 or similar small-form-factor successor to the SE in the spring, so we’ll see.
iPhone 11 Pro Max that I got as a gift. I loved my iPhone 6s-plus and would have kept it awhile longer, but the 11 has really impressed me. Battery life is amazing and wireless charging is really convenient. Oh, and the camera? Wow.
iPhone XS. CarPlay has me locked in.
This was on my Xmas list this year. Nobody bought it for me, so I guess I’ll have to buy it for myself. 
Pixel 4 XL that is 2 weeks old
Samsung S10e. Wife broke her phone and went to T-Mobile for a replacement. The Samsung was buy one, get one free if we added a line. We added her brother, he got my old phone and we got the new S10e’s. The best improvement over my old is the wireless charging. The phone to phone charging is pretty slick too.
My Verizon flip phone was 75 cents.
iPhone 11 Pro. I’m a sucker for camera upgrades. I would have bought it for the low light mode alone, but the addition of wide angle lens and deep fusion made it a no brainer for me.