TaG Timers need data to set. Once set, ‘cloud’ based messaging ensures TaG Alerts are sent when the set time expires.
SOS needs data to activate but will continue to activate in the event temporary connectivity is found.
If you expect to lose data connectivity: You can set your programs ahead of time and plan to TaG-in when you are back in data coverage area. Make sure your Program name contains useful information to help locate you, such as a route or destination. This Alert detail will help contacts to find you sooner.
If you are travelling to really remote locations use in conjunction with compatible satellite device.