Apps like CERNphone

Here are some great alternatives to CERNphone by CERN :
AGEphone
AGEphone
★5.0
Bria Enterprise
Bria Enterprise
★4.4
Bria Mobile: VoIP Softphone
Bria Mobile: VoIP Softphone
★4.1
CWB Communicator
CWB Communicator
★3.4
PortSIP Softphone
PortSIP Softphone
★3.7
Softphone
Softphone
★3.8
101VOICE Mobile SoftPhone
101VOICE Mobile SoftPhone
★4.6
GreenLink Softphone
GreenLink Softphone
★4.6
HelloSpoke Mobile
HelloSpoke Mobile
★4.0
Accent Connect
Accent Connect
★4.4
Audifone iTel
Audifone iTel
★3.9
BeOn® Push-To-Talk
BeOn® Push-To-Talk
★3.5
CEC Connect
CEC Connect
★4.3
Community by C Space (Old)
Community by C Space (Old)
★4.6
Linphone
Linphone
★3.6
Knox Meeting 녹스 미팅
Knox Meeting 녹스 미팅
★3.5