Notes: This router is unlcoked. But different operators have different frequency bands in different countries. This version can work in most of Europe Asia Africa countries. 4G/LTE-FDD: B1/B3/B5/B7/B8/ B20 B28 (700 800 850/900/1800/2100Mhz 2600 ) 4G/LTE-TDD: B38/B39/B40/B41 (1900/2300/2500/2600MHz) 3G/WCDMA: B1/B5/B8 (2100/850/900MHz) Asian Version:Frequency bands:4G FDD(B1/B3/B5/B8), TDD(B38/B39/B40/B41), 3G WCDMA(B1/B5/B8)Applicable to most countries in Asia, such as Israel, South Korea, India, Kazakhstan, Sri Lanka, Thailand, Japan, Singapore, Indonesia, etc. Europe Version:Frequency bands:4G FDD(B1/B3/B5/B7/B8/B20 B28), TDD(B38/B39/B40/B41),3G WCDMA(B1/B5/B8)Applicable to Europe, Africa, Asia, all countries and regions, such as Ruia, Israel, South Korea, Spain, Brazil, Ukraine, France, Italy, Netherlands, India, Nigeria, Switzerland, Kazakhstan, Poland, Ghana, etc. Note:the lan speed is only 4g 100mbps,in life can get 10-20mbps Please notice:1.As we all know that have so many operator and frequncy in the world ,so please check the frequancy of the sim card Compared with our goods,if you do not know the frequncy ,please ask your operator first.2.If the frequncy is right ,but can not connnect automaticly,for this can enter the ip addre ,thensetting the APNof the sim(the info can consult operator)3.If signal is unstable, you can also manage the settings page,lock 4G or 3Gnetwork, can effectively improve the stability of the network. Our factory and certificate,you can trust us,thanks.