So I've finally realized that when I'm at work, I have really bad cell reception and that is killing my battery. Ideally, I would like to leave my cell connection on, but change it from LTE preferred to 2G/3G. Seems like it should be easy to trigger as my phone automatically connects to my work WIFI. I've downloaded a couple of automating apps and see options to turn mobile data off, but that isn't what I think I want. Any suggestions on how to do what I'm trying to do? Or perhaps what I'm trying to do isn't even worth doing?