Your device will loose its waranty and it cannot be restored easily. However, please be informed, this post is t share the knowledge, and all responsibility of performing these steps is on you. Hence Using this method, will also delete all these other Data as well. In the post I will Also show how to restore this data. This DataLock Code is stored on a space called the NVRAM (Non -Volatile RAM), along with other data like your Device Serial Number, Device IMEI number, Wi-Fi default SSID, Wi-Fi Default Password. Hence, to change the firmware, we need to Remove this code entirely.

Also Airtel does not provide this Code at all. This code cannot be calculated using IMEI number easily. However the latest model, E5573Cs, uses the Algo V4, which requires a code, called DataLock Code. This flash code was easy to calculate for the Old models based on the IMEI number as the algorithm used was either Algo V1,Algo V2 or Algo V3. In the earlier models (E5573s), when you need to change the firmware, there was a need to enter a code known as a device Flash code. Also If you wish to donate to me, if you found this post usefull, you can using paytm and scan the QR code at the end of the post.

I am providing the eitire solution below, for every one and I don’t want money, however, if you need me to do this for you, then I will Charge 🙂. If you wish to share this on any of your own blogs please do add a link to this page. If you feel this post has helped you, please like it and re-blog it so that others can benefit.

I Maganed to find this solution with a little help of those blogs and research on my own. Now there are may many blogs out there where they will guide you to do the same, but they will not provide entire solution untill you pay them a small amount of Rs500/. This is because we need to Change the internal firmware to a generic Huawei Firmware instead of the Custome one which Airtel ships with. At the end of the post I mentioned that this device can only be Unlocked using a shot boot method. Hey !! So I previousy wrote a review on the AIRTEL 4G HOTSPOT E5573CS-609 MODEL, you can check it here. If you firmware version is 21.318.09.00.284 or lower, it will work. The above method does not work with the New Firmware models like 21.333.64.01.284.

How unlock modem 609 for universal