Today, I will talk about two Huawei Modem Code Writer tool which I have already introduced in my article. Both, Huawei Modem Code Writer tool is great but I want to highlight something with you. Yesterday I was unlocking one Stubborn Huawei E173bu-1 modem. I flash it properly and there was no error. After flashing the Huawei Airtel my modem firmware was 11.126.15.0.00. After changing the sim, Huawei Airtel E173BU-1 modem was not asking for unlocking password. 
 

Then I tried to write the unlock code using Huawei Modem Code Writer V1.0b by segmaster and I have got failed error. 

Huawei Modem Code Writer V1.0b by Segamaster

Huawei Modem Code Writer V1.0b by Segmaster

Previous I have got success in various modem, so I have tried to write the unlock code in Airtel Huawei E173BU-1 modem many time but i have not success.

Download Huawei Modem Code Writer V1.0b by sagmaster
Download Huawei Modem Code Writer V1.0b by sagmaster
HUAWEI MODEM Code Writer.rar
327.3 KiB
19880 Downloads
Details

After the various fail unlock attempts, I decided to try CardLock_Unlock Tool to write the unlock code in my Airtel Huawei E173BU-1 modem. And I was surprise, in only first attempt I have to got success to write the unlock code.
CardLock Unlock Tool
Download CardLock Unlock Tool for Huawei Modem
23.0 KiB
41066 Downloads
Details
 
Now you device which one is best Huawei NCK sender and which one you should use.
 
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Update : You can download cardlock unlock tool for MAC from this link.