Verizon 2TB shared cloud on Home/FIOS account. Can I use it to backup iphone?

I have the 2 TB shared cloud service associated with my Home/FIOS verizon account.  Can I use this account to backup my Verizon Wireless iPhone?   I can set it up on my computer with no problem, but when I download the app on my iPhone it defaults to my wireless account.  It keeps telling me I need to add the service for an additional fee.  The app doesn't allow me to logout and log back in with my home account.   How do I set up my wireless device to use my cloud?