I am giving two stars because most of the time, the app has failed registration error. Sometimes the app show no error of registration but yet do not either make calls. I mean on dailing, it doesn't dail the number and end the call right away. Moreover, Once I made a call to one of my friend in Pakistan via TelioTalk, the call disconnected after 14 mins but still I could see the call running (it might be app bug) Though my minutes were not deducted under this condition so I became relaxed. Moreover, whenever I make calls with TelioTalk, the call quality is reasonably good and doesn't feel like if I am calling via an app but feel like calling via a telicom operator. So it's good for me at least.