Can't Transfer xfinity Mobile Device from One xfinity Account to Another

We are in the 21st century and Xfinity does not have the technical capability to transfer an Xfinity mobile phone from one Xfinity account to another?!  I was told that I would have to port the number from Xfinity Mobile to another provider and then port the number back to the desired Xfinity Mobile account from that provider.  LOL, what kind of convoluted method is this?