How to move Xfinity mobile account to new Xfinity address/account

Hi,

I have established new Xfinity service at different address and wish to move my Xfinity mobile account to the new address/account. There will be a period (unceratin exact length, but at least a month) when both Xfinity accounts are active. I have linked the 2 Zfinity accounts, but do not see a way to associate the Xfinity mobile account with the newly created account. How to I get my Xfinity mobile account assoiated with my new Xfinity account/address?

Thanks.

Ron