To finalize your setup and ensure maximum wireless speeds throughout your space, use the following deployment steps: Huawei B311-221 Firmware Release Notes | PDF - Scribd

If you meant a specific tutorial title:

on the back of the device with a needle for about 10 seconds. or a specific carrier's APN settings for your Huawei B311-221? Unlock Huawei Modems - 3Community - Three Ireland