I used to absolutely love this app it was perfect I had a phone and I could call through the Wi-Fi but then I got an option to stop paying my phone bill for just $5 so I did I paid the $5 for the SIM card and it worked I wasn't paying for a phone bill and then all of a sudden I just stopped and it won't let me do that won't let me call it says network is unavailable for some reason but I've never made a call anywhere else but us in Canada it's really confusing.