1. a blocked call means someone is hiding something. 2. a blocked call could be a practical joke. 3. a blocked call could mean the person on the other end is dangerous. 4. a blocked call could be one of your friends wife's trying to find out who you are.and why your number is on the husbands cell phone. 5. a blocked call could be one of your friends trying to hide his voice so that he can talk you into phone sex at 5 am .. 6. a blocked call could be someone who's black listed and don't want you to know they are black listed. 7. a blocked call could be someone who insist you come work for them. and don't want you calling back when they threaten you. 8. a blocked call could mean that the person on the other end is at work and afraid you will call them back there. 9. a blocked call could be someone you refused to see in past. 10. a blocked call never actually gives any indication of who they are. so its best not to answer them .. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I may how ever enjoy the ones who call at 4 am wanting to whisper into my ear before they fall off to sleep that's fine but you don't have to block your number to do so. YOU WILL JUST GET MY VOICE MAIL