Hi there I'm having a problem with my defy, i'd like to know if some of you ar having the same problem and how to fix ir. I'm unable to call my facebook friends' cellphone. Always when i try, the signal bar disappers as if there were no signal. The call crashes and then it appears again normally. At the begining, i thought that this were some problem with my phone company. But i decided to do a test. I deleted te phone number of some contacts and called then. Suddenly, it called with no problem. And qhen i saved there numbers again, i was unanble to call again. I'm just having this problems with the contact that are syncronazed with facebook. May it be some viruses? Does any one know how to fix it? Sorry if there is another topic with this subject, but i couldn't find it.