when trying to make a call says airplane mode is on

I factory reset the phone, I've changed my APN (by going to my service provider and letting it send it to my phone itself), I have gone into safe mode with no luck, and there is no Wi-Fi calling on this phone. sometimes when I'm at work and there's no service it says I have no SIM card. then usually restart the phone and it comes back. when I make a call it says airplane mode is on but it's not at all. and when I shut down my phone sometimes it'll say airplane mode is on. I turn off airplane mode it'll show the outline of the bars for signal but there are no bars in there. and yes I have service I checked my data plan on the website. I have the ZTE Citrine Z716BL