1.This tracker will work with any card that support 2G/4G network in Canada. 2. this tracker does NOT involve any subscription charges or hidden fees. app and website free lifetime . How does it work? Any time you want to locate the tracker all you have to do is call the SIM phone number or send it a text message. Once connected the unit will send you a SMS Text message with a Google Maps link. When this is opened it will give you a location of the unit to within 5 meters anywhere in the world. Why is the app offline or not enabled? 1.If the application says that the device is not enabled or offline, you must set APN. The operation is simple. eg: For the Royers SIM card in Canada, send the following text messages one by one to set the apn below (there is a space after 123456 ) gprs123456 apn123456 internet.com apnuser123456 wapuser1 apnpasswd123456 wap 2.if you have problem with it ,pls kindly contact us by email,we will help you to resolve this issue. Specifications: Size: 3.5 x 2.8 x 0.8 inches Net Weight: 168g Color: Black Network: WCDMA/ GSM / GPRS Band : GSM: 850/900/1800/1900MHz WCDMA: 1900/850/2100/900MHz GPS Sensitivity: -159dBm GPS accuracy: 5m Input: 5V-1A Output: 110-220V Battery: Rechargeable 3.7V 5000mAh Lithium battery Standby Time: 60 days Package Includes: 1 x GPS Tracker 1 x USB Cable 1 x Storage Bag 1 x User Manual