Review on 🚗 SinoTrack ST-902W 3G Real-Time OBD GPS Tracker: Small Device Locator with Alarm System for Cars, Trucks, Taxis - Supports Tracking Platform by Adam Jackson

I have two SinoTrack devices with SpeedTalk (T-Mobile MVNO) SIM cards working in the US since Jan 2019. In July 2021, one of them (ST-902) stopped working in SD and never picked it up again (WY, MT). The SIM card in the phone worked. Customer support from both companies was weak and they blamed each other. I came to the conclusion that it was either a 2G failure (LTE phone was working) or a defective device, so I replaced the device and SIM card. Another device (ST-901) used to be stable in AZ but is now working erratically. This unit (ST-902W) was turned on but never received cell blocking (both rural and urban PA). I swapped the sim and got the same result. Both SIMs work in phones. According to SpeedTalk, the device must be WCDMA compatible for 3G. SinoTrack does not report whether your device is working. These were difficult devices to set up, even when they worked. If you want to try it now, get a $5 trial SIM card and work on it until the device return window closes. Even if you get it working on 2G, it won't work everywhere for a while. Look for "Disable 2G".