CellNet Solutions provides public cellular payphones that allow those unable to afford handsets to access cellular networks. Their SimPhony system converts random payphone users into subscribers by giving them individual phone numbers and SIM cards, allowing two-way communication. This provides value to cellular operators by broadening their customer base, to shop owners by increasing revenue, and to users by enabling services like SMS and data access at a lower cost. CellNet has tested their model successfully in multiple countries.