I have a question about porting (newb)

Two weeks ago I had a Admire and upgraded to a Nexus 5. Bought the phone online and activated in store. That same day my old 3G Admire was still active. The next day around morning I got a text message that said "A change was made to your acccount. The new amount due is.." I also got another text " Account upgrade complete." I checked my old 3G admire to make a call; it was dead air Disconnected.

 

Its to late Now. But for future If you wanted to keep your old number you can port that number to google voice You'll have to pay $40. (porting fee, account your number added to Gmail.) Then diactivate your old phone. And get a new account.( This qualify s you for all promotions) Make sure to add call forwarding ur new account. Once home. download google voice app. So now Your old number is yours, and you have a new phone number.