I have been on a family plan (contract is expired, it's month to month) with two devices and recently upgraded one of them to a smartphone. Of course I had to agree to a new contract to get the phone, which arrived today. I'm wondering within what time frame do I have to activate the new phone? I'd like to wait until the 14th of next month because that's when my billing period ends and I don't want to be paying for two plans at once. Do they still give you 30 days from the ship date to activate? Any help would be appreciated. Thank you!