Bitkey is currently built to be used with a single cloud account. We’re working on features that better enable mobility across cloud accounts and across mobile phone OS.
Note: If for some reason you must change the cloud account associated with your Bitkey Mobile Key backup, you can initiate a Delay + Notify recovery process. At the end of that process, you will be able to create a new Mobile Key to be saved in an alternate cloud account. More information can be found in How do I access my Bitkey wallet on my new phone?