SUPPORTED FREQUENCIES： FDD-LTE: B2/B/B/B/B2/B3/B17/B66 TDD-LTE: B38/B40/B41 UMTS: B2/B4/B5 Do Not Support:CDMA/GSM Sim Card! SUPPORTED NETWORKS: LTE/HSUPA/HSDPA/UMTS/EDGE/GPPRS SUPPORTED NETWORKS: LTE/HSUPA/HSDPA/UMTS/EDGE/GPRS/GSM Our router mainly supports three carriers, AT&T, T-Mobile, and Verizon. If you can not access the Internet, please try according to the subordinate operation (please make sure that your sim card is activated): 1.Insert the sim card, connect the power and turn on the router. 2.Wait for 2~3 minutes, wait for the router to respond, and observe the indicator light (for details, please refer to the user manual) 3.Use your computer to connect WiFi according to the information on the label on the back of the router. 4.Use the browser to open the webpage "192.168.1.1" and login. (Default username: admin Password: FIRSTNUM) 5.Click Mobile→Click APN (enter the information according to the sim card of the different carriers you are using). If you still can't solve your problem, please scan the QR code on the user manual