MT600 is the 4G LTE GPS Tracker was release in 2015, the device works very stable after upgrade the firmware again and again in the past 4 years. REAL 4G unit can works on 4G/3G network.It pass the CE, NTC, NBTC and Vodafone certificate, pass the test in USA, Australia, Asia and Europe etc.
Most of countries have shut down their 2G and 3G network.
4G unit can save your time and money, do not need upgrade 3G GPS Tracker again if 3G closed.
4G Full network coverage and Fast Speed than 3G/2G.