How to track down no caller id?

I have an iphone 5 and I just got a call from no caller id I didn't answer and I received a voice message from them. They were saying rude things making fun of my name in a horrid way and I can't figure out the voices. Just wondering I can't call them back and it doesn't show information about the caller so I really wanna know who this person is if there's any apps or trackers can you please tell if possible thanks.

Can a school district monitor your internet use on a private network off school campus?

I live in Long Island, New York, and my school district has put in place a Wi-Fi network for student use, which would have the expected Iprism firewall. The only thing with this is that in orer to use this service, you must first be redrected to another company's page where you have to "register" your device. Registering your device entails downloading something that will configure and alter your phone (I have an iPhone) , tablet, iPod, and computer's (MacBook Pro) settings, in order to use the network. I'm extremely uncomfortable with this because it involves installing something to use a service which alters my settings, and by law monitors my use on the network, as well as IP and other stuff. But the thing that really bothers me is what if the thing i need to install not only monitors me on the district network, but also on my home network or other network and keeps tabs and sends the information to school officials and/or authorities. If this actually happens, would this violate my right to privacy, and can the district as well as company that the district hired to engineer this program be accountable and prosecutable under the law? (Also, keep in mind, I'm 17 at the time of writing, but in november (2 months from now) i will be 18 (also a senior in high school.

Added (1). Let me just add a bit of clarification. As I stated before, I'm well aware that by law they have to monitor my use of their internet network. I have that down, I don't have a problem with that. What i'm asking is what if the software they are asking us to download monitors our use of the internet on networks off campus, public like starbucks, or private like at home. Is it in fact an invasion of my privacy rights, or are they allowed to do so?

Music randomly playing on iphone 5c?

Ok so I've had this phone for like a week and I put my phone on silent with earphones in it at school today and in the middle of class I hear music coming out my earphones even though I made sure all volume was off and I wasn't listening to any music that day anyway so I asked to go to the toilet and I turned it off then but can someone tell me why it's doing that?

Why are my relatives in Afghanistan so greedy and demanding?

I have lived in America for 15 years now. I'm 35 years old, marries and have kids now. My siblings and other relatives still live in Afghanistan where I'm planning on finally visiting after 15 years. But today when I called them to let them know I will visit them I expected them to be happy and ask me how I'm doing but instead they said don't bring us any clothes just bring us money we will shop ourselves. Another relative said bring me an iPhone. And I can't even afford one myself lol. They didn't ask me about my kids my wife or how I'm feeling or anything.

Do you think this is normal? I'm just very shocked and disappointed