My Iphone is no longer working?

I'm not sure if any of y'all will be able to help me. But this past Friday I restarted my phone and now it no longer works. It said "Searching…" in the top left corner. I restored the phone twice and now it's saying I have service but it will not let me make or receive calls, I can text but only every 30 minutes or so and now my imessage isn't working. I'm not really sure what's wrong with it or what I should do. I called my service provider and they couldn't help me.along with Apple. It's hard for a 16 year old to go without her phone. /: Thank you so much if you're able to help.

Try pressing the home button and lock button for some time, it may work, it may not, I had the same problem, it worked for me when I held down those two buttons but I dunno, and the imessage problem I also had once I updated it and it stopped working but if you go into settings and go to imessage reset it and stuff it should work

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