I guess the question would come up if whether or not crime is more ample in project areas than other areas, corresponding to different low-income areaS?
Generally Dog collar GPS Positioning supports GSM 2G network, but in some areas 2G connectivity is very weak they'd upgraded to fashionable networks. The tracker must be supported to the GPS mode and work by the GSM 2G Network, but these days many of the trackers are supporting a number of positioning Modes: GPS/LBS/WIFI Positioning Modes.

Henceforth the first thing that you should test, is the min and max positioning range. Also, it is advisable pay a 2G SIM card's calling and data payment (That is the monthly cost), and it additionally wants GPRS visitors package of min. Note: Now out there many 3G/4G sim playing cards aren't suitable with 2G network(GSM 850,900,1800,1900MHZ),so if you buy the sim card,please ask for 2G or 3G/4G that can help 2G community.