Huawei E3372h sub-model E3372H-510 is available in Guatemala with Tigo carrier. It is a hilink dongle and comes with firmware version 22.180.09.00.288 and WebUI 17.100.07.00.288.
Some info of E3372H-510 dongle:
Found modem : E3372
Model : Huawei E3372h-510
IMEI : 866658*****
Serial NR. : K2UDU1***********
Firmware : 22.180.09.00.288
Compile date / time : Oct 22 2015 21:17:35
Hardware ver. : CL2E3372HM
Dashboard version : WEBUI_17.100.07.00.288
SIM Lock status : Locked (Card Lock)
Wrong codes entered : 0 (unlock attempts left : 10)
As you can see that, it comes locked to Tigo Guatemala, but 10 attempts are left to enter the code. When you will change the SIM card from any another carrier and plug the modem to PC, it will prompt you for 8-digit unlock code. Means, once correct code is entered, it will be unlocked forever.
This data-card can be unlocked without changing the firmware as it can un-customized firmware. There is no need to change the firmware and there will no loss of warranty.
How to Unlock Huawei E3372h-510 (Firmware 22.180.09.00.288)?
1. Change the default SIM card with any another network provider.
2. Connect to Windows USB PC port.
3. Open My Computer >> Virtual CD-ROM and install in PC.
4. It will automatically open the default page of the dongle and will ask you for 8-digit unlock code.
5. Close the browser.
6. Run DC unlocker as administrator.
7. Click on Search button of DC unlocker.
8. You will notice that CD-ROM is again available in My Computer.
9. Now install FC drivers.
10. Again click on Search button.
11. You will see the details of your modem into DC unlocker app.
12. At the end of the result, in a new line, paste the following:
AT^NVRDEX=50503,0,128
13. Press Enter from the keyboard.
14. Copy the whole encrypted data and keep in a notepad file (I will ask this details after getting amount of unlocking).
15. Now pay 6USD (If unable to process by yourself, then charge is 10USD, I will unlock it remotely) and mention model with IMEI in the transaction.
16. I will ask about encrypted data in email.
Once encrypted data will be received, it will be converted into Unlock Code and will be emailed back to you.
17. Again put another SIM card in dongle and connect to PC.
18. When it will ask for Unlock Code, then enter the code and your E3372H Tigo will be unlocked permanently.