The SubPersonalV 12 month subscription includes 10mins/month Voice data/calls, 50 SMS credits, and almost* unlimited, from every 60sec (location) reporting.
* A reasonableness usage limit of 2,000 position reports per week, & a minimum 1 min reporting interval applies. This is far more than even a very heavy user typically uses.

This subscription is for a normal number of alerts or commands by SMS to a mobile phone number in a year. 
It also covers the monthly cost of: TrackServer platform; SIM rental; Data; GoogleMaps license and Support.
The TrackServer apps shows the subscription expiry date and the remaining SMS credit balance.
Customers should set up a reminder of when subscription renewal will be required.
Additional SMS credits can be purchased, if needed, by adding them to a basket, etc. See Extra SMS Credits.