A:AnswerYour plan may change depending on your current plan. As for your number should stay the same they'll just port your number over to the new phone
A:AnswerOnly if you have the dual sim card unlocked factory edition nkt assigned to and by a carrier. You may however download an app that ports a number into the app and works independently of the phone it self you can download a variety of apps that give you free numbers in and area code and prefix
A:AnswerI bought this as a carrier phone but it will unlock after purchase terms are complete as far as carrier imei list but it is unlocked on all bands out of the box so technically yes