How do I dial directly to a voicemail without ringing someone's cell phone aka "voicemail backdoor"?

I know with Sprint/Nextel you just go into your own personal voicemail like you are checking your mail and there is an option ( like press 1 to.. press 2 to...) to record a message. Well you go into that record the voicemail that you want to leave the other person. When you are done it will have you enter the phone number that you want the message to be sent to. It will replay the message and ask if you are sure you want to send. THen you just have to press 1 or # to send message. Then it will send the message to person without their phone ever ringing. Hope this helps!

i can backdoor v-mail on Verizon by checking my own voice mail, then letting the main menu come up. choose option 2 from the main menu - send a message... then record and it will ask for the destination mail box... it will dump directly in to their voice mail.

On a Verizon phone when you check in to your own voicemail there's an option that says to send a voicemail press such and such number then you dial in the number (area code first) and your directed to their voicemail. Yes it's usually *86 or if you have a picture of a mail on your Key pad on #1 you press and hold it and it sends you directly to your voicemail but otherwise it's *86.