I'm still in my first quarter in the RN program, I have five kids, I'm a single mom, and when I'm in clinical, I keep my phone on me, but it's on silent. The ONLY time I look at my phone is on bathroom breaks, lunch break, or when we're in the conference room where it was explicitly said we could use them.
Yesterday, we were at clinicals all of 30 minutes before I got a message from my 13 year old freaking out because my 8 year old fell out of bed and they thought her arm might be dislocated or broken. I happened to get the message quickly because I was still in the conference room, but they were going to call me at the location if I hadn't answered anyway, as this was an emergency. I legit have zero reason to have a phone out on the floor, whether it's directly on the floor or in a side vestibule or whatever. None. And that's with all of my spawn at home. (Kid is fine btw, after a fun trip to the ER, we figured out she angered some muscles and tendons and has a lovely bruise) I can't see any possible reason for you to have your phone out, ever.
I also have several issues medically, and I have not yet formally filed paperwork (though I am going to), but my instructors also know that I have those medical issues. It's not favoritism, it's being real and knowing your limitations and risks for having trouble within the program. The same goes with my kids. They know I have way too many crotch goblins, I'm not looking for special treatment, I'm being realistic. Plus, no offense, but I thought it was common knowledge that nurses are on their feet all day long, it would seem prudent to take care of that issue ahead of time knowing this.
As for the other stuff, it sounds like some of it was justified and some was just dislike from the instructor. We all have issues with people here and there, the difference is how we handle it, as others pointed out.