HTC One Remix Calls Dropping, texts Failing

I just got this phone about a month ago. Everything worked fine except my calls. Ever since i got it, id be on the phone & it randomly hangs up and says " Call dropped" Its frustrating. Id say in an hour phone call, the call would drop about 5 times or more. And recently my text messages arent sending. They fail, and i have to turn the phone off & back on to resend. What the hell is with this phone?