If you succeed, you will join an elite group of power users who squeeze every last megabit from their 4G network. If you are not ready for the risk, consider a paid unlocking service. Either way, do not settle for a locked, crippled router.
If an unlock attempt causes connectivity issues, you can perform a factory reset: Open the web browser and go to 192.168.8.1 . huawei b311221 unlock firmware top
To understand the demand for unlock firmware, one must understand the business model of the ISP. When a provider sells or gives away a router like the B311-221, they subsidize the hardware cost. To ensure they recoup this investment, they implement a "SIM lock." This is a software restriction that prevents the router from accepting a SIM card from a competing network. If you succeed, you will join an elite