evidence: - Content of this chapter, contact the issuing office listed above. [...] - NIH Staff are prohibited from using unapproved Internet Protocol based mobile messaging (e.g., Apple iMessage, WhatsApp, Messenger for Android, and other instant and direct messaging communication services) for official NIH Business on NIH Managed Mobile Devices. [...] Answer: Yes, voice calls are permitted on NIH-Managed Mobile Devices. Video chat/calls are allowed utilizing NIH approved platforms, such as MS Teams, Skype and/or ZoomGov. Unapproved native voice/video or third-party video applications such as Facetime, WhatsApp, Google Meet, etc. are not authorized or permitted. If Mobile video calls are initiated via an unauthorized platform, NIH Staff are allowed to respond and redirect these calls to an authorized platform.