MizuDroid is a free, unlocked, professional SIP softphone from Mizutech. The app doesn't include any VoIP service. You are free to configure it to be used with any SIP server or service provider. Note1: You will need to have a SIP account to be able to use this softphone and calls to mobile/landline phones might cost you money.
This application has been scanned for viruses and it has been found totally safe. The app is designed by Mizutech and its category is Communication. MizuDroid SIP VOIP Softphone was rated 3.7 on Google Play.