Zem Ultra is an application to make GSM calling over the world.It's only design for iPhone. International VOIP calls can be made using this application. If anybody has SIP server then can contact with us with his details we will configure an Operator code for him so that he or his customers can make VOIP calls. Its free to download and anybody can use this. Application has Logs to check Call History.
Loudspeaker enable ,disable
Recent call logs show all call history
Call hold support
Internal data changes