Rumia gave each of the hired high-levels their own [Peelphone 2.0], from the latest model line that was just released to the public. And, a huge upgrade over the prototype version Akira had originally been given: boasting an advanced HUD menu that enabled communication with multiple users through added number dialing, and low-res rudimentary video conferencing options. Also, rather than just heating up as the prototype did, this one would play a whole audio clip of a macaque hooting and howling whenever a call was being received, which could be heard from inside one's inventory.
Akira was also given one by Rumia, when meeting with the high-level hirelings that evening, just before they were to set out for the trial cave. Thereby, she could manage their progress from the surface.