I tried calling my own number using a 1 in the front and without a 1, and both times a busy signal.

I am using Samsung Galaxy 7.

I've been told that there are no Verizon towers in St. Croix US Virgin Islands, and this might be why I'm having trouble. I can say that there are no Verizon stores in which I could go get help.

However, I do receive texts and phone calls. I just am unable to access my voicemail now, which I never had an issue on the mainland.