Why won't my iphone activate?

Okay so a few weeks ago my iPhone lost service so I had to put it in recovery mode and restore and update it to get service again and a few days later I lost service and had to repeat the process and my phone was fine and had service again. It was okay for like a week and then I let my battery run out so it died and then when I charged it again it lost service. So I went to restore my phone again but it kept saying that it couldn't activate right now on my iPhone screen while trying to set it up "your iPhone could not be activated because the activation server is temporarily unavailable. Try connecting to iTunes to activate it or try again in a couple of minutes" appears. So I connect to iTunes but it tells me to go to apple support because it won't activate. So now here I am can someone help?