Check Coverage at our websiteSTKMapA GPS tracker needs a SIM card for tracking services to work. Remotely communicate with the tracker via the phone number associated with the sim card. Some use text messaging to locate the tracker, other devices use data connection. Either way, our SIM cards offer Voice call, text and nationwide 4G LTE Data. Choose from a variety of Monthly Plans starting at just $5, see plans at SpeedTalkMobile. Use your own device - Ready to use. Activation Code included. To activate visit ActivateSpeedTalk.After SIM activation, it may take up to 24 hrs for the GPRS and data settings to sync and update with your device (phone/Alarm system/smart watch/gps tracking device). Make sure to turn on your device in an area with strong reception.Our SIM cards can be used with any unlock GSM device such as but not limited to: GPS Tracker Kid GPS Trackers Trackers for Seniors Car Alarm Systems Smart Watches GSM Home Alarm SystemPlease Note: 2G & 3G services might not be available in all areas due to carrier decommissioning/shutdown of these frequencies, SpeedTalk Mobile recommends using 4G or newer devices for better service. Existing SpeedTalk customers who are using the service on their 2G or 3G devices, can continue to purchase SpeedTalk products to refill/reup their existing accounts.SpeedTalk Mobile offers its services through subscription plans which auto-renew every 30 days. Plan begins as soon as you activate your service. You?ll be charged the rate stated at the time of purchase, every month, until you cancel. There is no contract, cancellations can be made any time by contacting customer support. A valid credit card is required to cover overages in case you exceed the applicable Voice, SMS and Data limits. To avoid overage charges, you should purchase the appropriate plan for your anticipated needs.