Generally no, although this depends on the state.
It is illegal to record any conversation, be it land-line, cell phone or in person without the person's consent. Recording without their permission is a punishable crime. http://www.telephonecallrecorder.com/legality_of_phone_call_recording.php
It is only legal IF the person is on the passenger's seat.
No, it isn't legal to bug cell phones or jam them.
No
no
Yes it is! Many people now have a second cell phone that you pay as you go and use that phone to verbally harass a person. My friend was told to kill her self, that she was worthless and so on. The police got involved because all the proof was on her phone so in the end the whole problem was solved.
If the person's number is private or restricted, it is not legal for anyone to post it here or anywhere else.
It is legal to use on your kid or employee or on a phone you own
A cell phone search service can provide you with the name, number and location of a person by doing a reverse lookup. They are able to get landline and cell numbers that are not listed in the phone book by using a huge database of information. It is completely legal, but comes with a charge.
There is really only one legal way to find someone's new cell phone number. You must ask this person for their new number.
Yes, that is perfectly legal.
The cell phone number of Yael Zabala is not known. The cell phone of Yael Zabala is not public information. Cell phone numbers are not listed and a person needs to ask the person if they want their cell phone number.