Everyone was using it! If it had the popularity that say, Facebook messenger had, it would probably be my primary source for communications on my mobile phone, tablet, and iPod. Unfortunately it has the least amount of friends within my contacts list so its not totally free. The second phone number is crucial as well but with the same flaw.. Suggestion: make all incomming messages, calls, etc. (within the same country...international would be asking too much lol) free, same idea as some contenders but with the features they lack. We all want an All-in-1 "communication" app [voice/video calls (carrier/VoIP option), audio/video/voice messaging (sms/wifi option), PTT/walkie-talkie/2-way comm. feature, ability to add extra "burner" numbers (with same features mentioned), (visual) voicemail, notifications and ringtones. International features are nice but not as essential as the specifics listed. Fingers crossed...