My GF has a Samsung G5 and I have a z10, but recently calls initiated by either of us randomly goes to VM. The caller will hear the phone ringing maybe twice and then voice mail, the recipient will hear nothing. Usually callbacks within a few minutes get the same result..i.e voice mail. I am able the get through by calling her land line, or with some measure if persistence (but mounting frustration) the call eventually goes through...thoughts..comments welcomed??.. i read in a previous Verizon forum that this issue sometimes occur with recently downloaded apps or if one or both phones are on WiFI, or maybe issues with Blue tooth pairing???