Esim with existing t-mobile number?


    Currently have a simply prepaid plan with T-mobile that I am very happy with.  It uses an old fashioned SIM card.  Looking to buy a new apple phone and use the eSim technology.  It looks like my plan is offered on eSim.  Question is - can I keep my existing number?  I know you can port an existing number but this is essentially porting from T-mobile to t-mobile.  Want to be sure before I drop $700.  Has anyone done this and if so how?

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