This is a simple application for sending SMS over GPRS/3G/wifi. It is useful for people(like cabin crew etc) who goes overseas often. RoamingSMS is useful because normal SMS cost is quite expensive when you are roaming. But this application only charge you less than U$0.03 to US0.05/SMS. It is much cheaper. Remember to switch off your data roaming service because there are many other applications on your android phone and they may use your roaming data service if you do not switch off roaming data service.