1. Our 4G router only support universal ordinary SIM cards. For some locked SIM cards, contract SIM cards which operators don't allow to work on wifi routers , or only allow to work on their authorized devices. This product can not work,you might see it connected to local 4G network , but you are not allowed to use Internet service(IF your SIM card can not access to Internet,pls don't be panic.usually you change another operator's universal SIM card,then it will work) 2. Knowledge about 4G speed . in practical daily use, 4G WiFi router usually would provide 1 - 20 M/s download speed for WiFi users.it's enough for ordinary users to watch video,play games ,etc smoothly. 3. Router's 4G chipset top capacity is 150M, and 4G base station's theoretical top speed is 150M too.however the 4G base station provide service to many 4G users at the same time, instead of giving full 150M bandwidth to one user,and 4G signal strength,SIM card limitation and environment would affect the network speed too.IF some user eager for top theoretical speed,and love to use inaccurate APP or software to test network speed,pls don't buy. no product on market would meet such requirements. 4. High speed LTE Chipset, Support TDD-LTE/FDD-LTE/UMTS/ networks. Up to 8 WiFi users. Big rechargeable lithium battery. small size pocket WiFi Hotspot. USB modem on Windows computer 5. This device provide high speed 4G LTE WiFi access, support 8 WiFi users and able to work as USB modem on Windows computer. This wifi router support both 3G & 4G networks. Tablet, Laptop, computer, Mac books, mobile phones and different types of WI-FI devices can connect to the 4G WiFi routert to access to Internet The router supports below 4G/3G frequency bands: 4G:B1/B3/B5/B7/B8/B20/B38/B39/B40/B41 3G:B1/5/8 It works in Europe, Asia ,Africa ,middle east and Brazil. If your countryis in below list , you can order the router directly. Russia,Spain,Ukraine,France,Belarus,Polan