Huawei E5172 detect and unlock guide

Video tutorial
NOTE: If your router version is E5172-22 then skip updating process and continue from steps below that involve DC-Unlocker software
Download Huawei E5172 Updater Tool (Modified by DC-Unlocker)
Further actions requires internet connection and DC-Unlocker/Rocker/Vygis or Infinity dongle
Launch Huawei E5172 Updater tool, wait for your dongle to be recognized, then click "Start updater" button

From Network card line select your computer's one, then click "Open" button

Locate "update" file in directory where Huawei E5172 updater tool is placed, select it and click "Open"

Click "Start" button, then shortly afterwards connect Huawei E5172 to PC and turn it on. Updater will find router automatically and updating process will begin

Wait for procedure to finish

Monitor the signal indicators on the router. When all 5 of them are lighted up, you can close updater. Restart the router

Launch DC-Unlocker client

Open Server tab, enter your username and password that you received after credits purchase. Click "Check login". (you can buy credits here www.dc-unlocker.com/buy).
If DC-Unlocker/Vygis/Rocker/Infinity dongle is connected, only click " Check login "

Detect device by selecting Huawei modems from manufacturers drop down menu list, leave Select model as auto detect (recommended) then click magnifying glass button

Wait for device to be detected

Open "Unlocking" tab and click "Unlock" button

Wait for router to be unlocked

Restart the device, now it is unlocked and will work with other operators