Is he ignoring me or did his phone really break?

I just have been dating a guy for a month everything has been great. On Saturday he called me and as I answered the phone disconnected. He then text me and said he will call me right back his phone is messed up. He never called back. I text him and called him but no response. I called on Sunday got his voicemail. Same on Monday. But when I tried on Tuesday I got an different voicemail " the caller is unavailable at this time try again later". I then waited a few hours and sent him an iMessage. The message immediately said Not Delivery. Then I sent it as a text message. I haven't contacted or heard from him since. I'm just confused because we both seemed very excited to start our new relationship and things just felt right between us. So I'm shocked that he hasn't respond. Please help me make sense of this. Should I give up or try and call him again? Thank you in advance.. Ps.. if it matters he has an iPhone 5 and his provider is Sprint.
Is he ignoring me or did his phone really break?
Add Opinion