tkstar tk909 pet gps gsm gprs tracker locator lk909 gps tracking device with collar for dog cat web app tracking

1. our this tk909 gps tracker can only work with 2g gsm network,it does not support 3g 4g or 5g network.if your 3g 4g sim card can also support 2g network, then it is ok to use.but if your country have closed 2g network,we suggest you choose our 3g 4g gps gsm tracker. 2. our this gps tracker need to use a sim card, the package has no include any sim card,please buy the sim card from your local market.