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Unlocking my Huawei E5573s-320

June 23rd, 2019

The story is such that I was given a locked Huawei E5573s-320. I used for while with original network. However, that worked only in another country than my permanent residence country. Unfortunately, the battery got faulty and I ordered another one (via eBay).

I replaced the battery and it worked quite well but the modem remained locked. There is very little value from a locked modem… After some googling, I learnt that v4 code generation algorithm is used on my modem. All online/offline Huawei calculators, which I checked, do not support this version. cul de sac 🙁

I came across this thread on 4pda.ru about a workaround for unlocking Huawei E5573 and I decided to take the risk either brick it or unlock it myself.

Disclaimer: I am not responsible for any damage during unlocking your modem. That worked in my case but there is no 100% warranty that it will work for you. Whatever you do, you do at own risk.

The files which you will need during unlocking

  • Huawei Unlock code calculator (we will use only to calculate the flash code)
  • P711s-E5_Update_21.110.99.02.00.exe
  • dc-unlocker_client-1.00.1220
  • E5573_Update_21.180.17.00.00.exe
  • E5573s-320_Update_21.329.01.00.00_M_AT_04.10_nv.exe

I just collected info about FW, HW, etc. before doing any changes:

  • Device name:     E5573s-320
  • IMEI:
  • IMSI:     Unknown
  • My number:       Unknown
  • Hardware version:           CL1E5573SM01
  • Software version:            21.180.17.00.983
  • Web UI version: 17.100.08.01.983
  • LAN MAC address:           AC:CF:85:34:36:AC
  • WAN IP Address:              Unknown

The last number of 21.180.17.00.983 indicate, that the modem is locked.

The unlocking process itself was quite straightforward:
1. You just switch on the modem without any SIM card
2. The modem can be switched on and before by pressing the button
3. Connect your modem to PC by USB cable 4. After starting the re-flashing with P711s-E5_Update_21.110.99.02.00.exe, you will be asked for a reflash code. This code needs to be generated with Huawei Unlock code calculator based on the IMEI code.

Here, you calculate the flash code with Huawei unlock code calculator and enter in the firmware update popup and press OK. You should see the following screen.

Unlocking Huawei E5573s-320

At the end of the update, you will see:

Unlocking Huawei E5573s-320

After re-plugging you modem, your Windows Device Manager should show few unrecognized devices:

Unlocking Huawei E5573s-320

To install the drivers for them, you need run Mobile Partner:

Unlocking Huawei E5573s-320

After this, you should see:

Unlocking Huawei E5573s-320

If you open Mobile Partner and check the properties, it should look like this:

Unlocking Huawei E5573s-320

The next step is marked as strikethrough. I do not know either this would happen in all cases, but it was not really needed in my case.

6. You need to install DC unlocker, after detecting your modem, it should let you to enter unlock command. On XDA developers forum, I found the commands should be “U can try command AT^NVWREX=8268,0,12,1,0,0,0,2,0,0,0,a,0,0,0 in dc unlocker for general unlocking or AT^NVRDEX=50503,0,128 for custom unlocking – then use calc v4.”

DC unlocker showed like this:

Unlocking Huawei E5573s-320

SIM Lock status unlocked. Nothing else was left as only return back to a normal (unlocked) firmware.

Unlocking Huawei E5573s-320

The update process ended with:

Unlocking Huawei E5573s-320

Here, I got back regular WEB interface of the modem and it accepted a “foreign” SIM card. Just keep in mind, that if you use a virtual GSM/4G provider, you will need to correct the connection settings. That will need manually entered and they vary from provider to provider.