Apps like OpenScape Mobile Pro

Here are some great alternatives to OpenScape Mobile Pro by Unify Software and Solutions GmbH & Co. KG :
Anywhere Connect
Anywhere Connect
★3.4
Sipnetic
Sipnetic
★3.9
Groundwire: VoIP SIP Softphone
Groundwire: VoIP SIP Softphone
★3.5
REDCOM Sigma Client
REDCOM Sigma Client
★4.4
Yeastar Linkus Mobile Client
Yeastar Linkus Mobile Client
★3.9
Zoiper IAX SIP VOIP Softphone
Zoiper IAX SIP VOIP Softphone
★4.4
Wildix Collaboration Mobile
Wildix Collaboration Mobile
★4.3
Acrobits: VoIP SIP Softphone
Acrobits: VoIP SIP Softphone
★3.5
Bria Mobile: VoIP Softphone
Bria Mobile: VoIP Softphone
★4.1
HelloSpoke Mobile
HelloSpoke Mobile
★4.0
Vodia Phone
Vodia Phone
★3.7
Silver Dialer
Silver Dialer
★4.3
AGEphone
AGEphone
★5.0
Mabrook Plazma
Mabrook Plazma
★3.5
Zeo Dialer
Zeo Dialer
★4.0
jiPBX - SIP VOIP Softphone
jiPBX - SIP VOIP Softphone
★4.2