Most Helpful Guy
OK. Rule of thumb. If there is a will there is a way. Regardless if his phone got stolen, or he didn't pay the bill, or his dog ate it... There are other methods in today's world. Like using a friends or office or dare I say even a personal visit.
No Contact=No Interest and dis respect. He most likely found another, sorry to put it blunt like this, but I believe most people should communicate how they feel so they do not leave the other in despair.
Best thing, is to move on with your life and show how good you are to another who will appreciate you. Your better than that to wait for him to come back.
Good Luck, Don't beat your self up over it. No one is worth that...
And BTW - If he cared for you at all, he would have considered your feelings and just said he needs a break vs. no contact with that lame excuse..