Apps like Connect.US

Here are some great alternatives to Connect.US by MMDSmart :
Mabrook Plazma
Mabrook Plazma
★3.5
Marrygold itel
Marrygold itel
★3.9
Groundwire: VoIP SIP Softphone
Groundwire: VoIP SIP Softphone
★3.4
AGEphone
AGEphone
★5.0
SessionTalk Pro Softphone
SessionTalk Pro Softphone
★3.2
Acrobits: VoIP SIP Softphone
Acrobits: VoIP SIP Softphone
★3.8
Sipnetic
Sipnetic
★4.0
jiPBX - SIP VOIP Softphone
jiPBX - SIP VOIP Softphone
★4.0
SessionTalk Softphone
SessionTalk Softphone
★3.5
Vibervoiz MoSIP
Vibervoiz MoSIP
★4.3
VibePlus
VibePlus
★4.0
REDCOM Sigma Client
REDCOM Sigma Client
★4.4
SessionCloud SIP Softphone
SessionCloud SIP Softphone
★3.6
Voip By Antisip (+Video)
Voip By Antisip (+Video)
★3.7
Linphone
Linphone
★3.5
HelloByte Dialer
HelloByte Dialer
★3.7