Do you plan to make changes to the app
1) Does not read phone contacts, makes it hard and difficult to make calls. You have to go check and write down the number and then go back to the app to dial out. This is a very basic feature on all VOIP dialers
2) When the app is open you can't click back to exit the app
3) When you receive a voicemail no beep or notification on the app to let you know that you have messages
4) No conference call feature
5) No video calls
issues 1 to 3 should be easier to add.