I figured this would be the best place to post my dilema - I hope someone here can help. Here is my problem: I have recently (2 days ago) bought a new car - A dodge Magnum RT with every option available: Navigation, Sirius satellite, Blue tooth...etc. I am a realtor in Los Angeles and I use my laptop almost everyday out of my car. I have a VERIZON Anywhere PC card, a PCMCIA card with a magnetic antenna if I need to locate a WIFI spot in order to send property pictures...and of course the built in WIFI from the laptop. For the past 2 days I cannot connect to anything - it sees the networks it connects, but I cannot upload or download anything. I went crazy - I bought a new laptop - same thing, I bought a new network card - NOTHING! However, today, out of desperation - I tried logging on from the car while it was turned off (completely off) Guess what? I can connect, download upload etc just like before! As soon as I turn the key in the ACC position/ignition I lose the connection! What is causing the interference? Is it the SIRIUS antenna(on top of the car) the NAV system??? On my last car I had a aftermarket XM radio and it worked, it had NAV and it worked...What can it be? Please help....
Wow. That doesn't seem likely but if you have it working with the car off and now when its on - it would stand to reason that that was what is killing your signal.
I would try and call Dodge and Verizon. It will be a long process getting to someone who can help but it may be worth it. Go back to the dealership maybe?
Verizon air cards are the greatest thing ever so I feel your pain. Be sure to post back if you find a solution. But you are in a tough spot.
I need some help really bad!!! 
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