hi. I have a droid(main line) and 2 more lines under my account. other 2 are all elgible for an upgrade. If I order a droidX for one of eligible upgrade line from VZW online and when I get droidX, can I just activate it to my number without any trouble? If I order a droidX for one of other eligible lines, I have to put the data plan, and after I activate droidX to my number, will data plan charge be removed automatically from one eligible line which I took the upgrade to droidX? Thanks.