After a bit of time to feed and recover from the situation in the Bypass, Arnold - still one handed - calls the Prince by setting his phone down on his desk and poking at the buttons with his good hand until the call is sent and he can pick it up and put it to his ear.
He wonders briefly which one of Asa's beautiful ghouls would likely answer the call. While he waited for the line to pick up he could feel the missing hand clenching, despite the impossibility of the act, and marveled at the strange feeling.