Simple sip phone or mobile dialer like galaxy sip settings to be installed on phone and being used for doing long distance calls.
sure it has to be native and designed to company's desire.
45 freelancers are bidding on average $20/hour for this job
Dear Client, Our expertise can make you feel the difference between 99% and 100% work satisfaction. Our work portfolio shows quality & delivery time as a perfect solution. Warm Regards, Om Infowave