After switching to Verizon from AT&T, my friends are reporting that when I send a text message, they will receive the same message two to four times in a row.  Sometimes a message will continue to repeat itself after x minutes.

I know it is not the phone because I first had a Droid Razr and then switched to the HTC Trophy.  The problem occurs on both phone.

I just got the Trophy today and straight out of the box, after activation my friends reported receiving multiple messages again. 

I'm using the native text messaging app and have powered the phone off several times.  But again, since it happened with the Droid, it doesn't seem like it would be a phone issue. 

Any thoughts of this would be great.