Steps to Lock Your E5577 Router To 3G/4G only.
Your router supports four network modes (Auto, 4G only, 3G only, 2G only) and two network search modes (Auto and Manual). By setting a network mode, you lock your router to only search for signals that you have selected for example if you select 4G only then it will only search for 4G signals or if you select auto then it will search for the strongest signals available.
Step 1: Connect your computer to the routers WiFi network (or connect the computer to the router's LAN port using an Ethernet cable). Open your internet browser. Log into your routers web-based management page (check the nameplate on the router for the default IP address).
Step 2: Go to Network Settings then select Mobile Network and then select Mobile Network Searching.
Steps to lock your E5577 mifi router to 4G onlyStep 3: Set the preferred network mode and network search mode and select save.
How to set the mobile network router settings for the Huawei E5577