You would need to purchase a PM sim and port (transfer) your current phone# over. You would need to keep your current account open with your provider during the porting process.
you absolutely can.
And its very easy to do. Just Order a public mobile SIM from the site or any store that would sel them (walmart) and when you receive it, you can go online and activate. During that process it will ask if you want to transfer your number. Select Yes to this and follow the directions. i did it and the whole activation took 7 minutes
This thread is only 4 1/2 years old and asks somewhat of a redundant question.
If new customers find a thread and repeat the same question that the thread has then so be it. We're here to help. We can certainly inform the customer that um... read much??.. but still...