MizuDroid SIP VOIP Softphone

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.