The device will only work with GSM carriers and is locked to AT&T until you enter the unlock code that is provided. Here is the simple Netgear Nighthawk M1 (MR1100) - Unlock's Code Instructions. Remove back cover and battery. Remove the pre-installed AT&T SIM and install a non-AT&T SIM into the device.
Insert the battery, replace the back cover and power on the device. Connect a Wi-Fi device to your mobile hotspot (follow the Lets Get Started guide on how to). The default login is "admin" and "attadmin" as the password.
Enter 8 digit unlock code to unlock your device. (It may say invalid code, but try again and reboot your device and it should say your new network carrier). If you have any questions, please let me know! The item "NEW NETGEAR Nighthawk MR1100 LTE Mobile Hotspot Router ATT Unlocked" is in sale since Monday, July 20, 2020.
This item is in the category "Computers/Tablets & Networking\Home Networking & Connectivity\Mobile Broadband Devices". The seller is "exclusive_electronics" and is located in Randolph, New Jersey. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Croatia, Brazil, Chile, Colombia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.