Temp (The Grand Multiverse Hotel)
From Jenny Everywhere Wiki
One minor Temp infected Wendy Severn's mobile phone, attempting to get her to agree to letting it take root in her mind by posing as Squire Psykha (whom it misidentified as the Embodiment of Information rather than the Embodiment of Thought). The Queen of the Black Market informed Wendy of the deception and used a virtual curse toadstool to convert the Temp into a virtual wraith. Remaining inside the phone, the now-enslaved Temp allowed it to continue to function, including from one universe to another, and respond to voice commands. (PROSE: The Grand Multiverse Hotel)