What are y’all using, brand wise? I know little to nothing about this subject.
I am particularly interested in some that can transmit to my phone across LTE or some mobile service.

I’ve been using Spartan Cams for several years now with zero complaints. I have 8 of my own and 24 total that are shared among friends. Pics and video can be sent directly to your phone and computer.

Stay away from Spypoint.
I have a Bushnell that has been doing well.

I like Browning, you get what you paid for with the more expensive models vs the cheaper. Last couple of years I've been using cellular Stealth Cam ones I pick up at Sam's Club on clearance. They still work if the cell plan goes inactive, I don't think you can change them from your last settings though.