This is the safest method. It uses a code generated from the device's unique identifier (IMEI) to remove the carrier restriction.
The router will say "Unlock successful." You can now safely upgrade back to the latest firmware via the "Check for Updates" button—the unlock is permanent. unlock huawei b311221 updated
Connect your computer to the router via Wi-Fi or Ethernet and go to http://192.168.8.1 in your browser. This is the safest method
This is the safest method as it does not void your warranty or risk "bricking" the device with third-party software. ExpressUnlockshttps://expressunlocks.com Unlock HUAWEI B311-221 - ExpressUnlocks unlock huawei b311221 updated