CERNphone mobile is a softphone app for the CERN community: - Telephony within CERN - Support for Wifi and mobile networks - App wakeup via Push Notifications CERNphone mobile usage is restricted to the CERN community and is subject to usage authorization. Find more information under https://cernphone.docs.cern.ch (CERN login required). CERNphone mobile is based on the popular Linphone open source client. If you are not associated with CERN, please install Linphone instead (available on Google