Apps like NimbusPhone

Here are some great alternatives to NimbusPhone by UC Apps :
voipoffice
voipoffice
★4.0
iPlum: 2nd Phone Number App
iPlum: 2nd Phone Number App
★3.7
VirtualPBX Softphone
VirtualPBX Softphone
★3.8
Telzio
Telzio
★3.7
TeleConsole
TeleConsole
★4.1
Corporate Phone
Corporate Phone
★3.8
Voiply Mobile: Calls & Text
Voiply Mobile: Calls & Text
★3.9
RemiPBX
RemiPBX
★4.8
Grasshopper
Grasshopper
★3.7
MobiCalls VOIP Calls
MobiCalls VOIP Calls
★4.3
iTel Mobile Dialer Express
iTel Mobile Dialer Express
★4.0
MightyCall Mobile
MightyCall Mobile
★3.3
OneCloud
OneCloud
★4.1
Zoiper IAX SIP VOIP Softphone
Zoiper IAX SIP VOIP Softphone
★4.3
HelloSpoke Mobile
HelloSpoke Mobile
★4.0
Linked Phone Business Number
Linked Phone Business Number
★4.2