Review on GSM SIM Card for GPS Trackers - Pet Kid Senior Vehicle Tracking Devices - 30 Day Service with Roaming in US, Canada & Mexico by Sfl Richardson

It works like a charm. The best way to track it for $5 and the easiest way to see it. I have it on iPhones. You insert a SIM card after creating a Speedtalk account and paying for the service I got a $5 plan to try then I send a message using my account phone with LOCATION infinity. I receive them on my regular phone then I removed the sim card put it in my gps tracker device and it worked fine now hidden another device in the car can now use an old phone and the sim card keep in car when you park your car in bad or shady area where there is high rate of theft and tracking with your iphone or android one-time gps tracking service only pays $5 per month. I'm sure each car or kid is $5 a month. Speed Talk uses the T-Mobile network so it will work with any unlocked phone or any subway or sprint or any version of T-mobile or at&t unless your photo is for all networks unlocked