1. Get the Flash Code for your device and save in notepad here Huawei Flash Code
2. Install This For only model Huawei_E5573s-606_Firmware_21.110. Download Click Here
Do not Use Both Firmware For one Device You should First Choose Your model and then download both models downgrade firmwares are available
4. Restart ur PC
6. Run as a Admin Huawei 2015 Code Reader
7. Select PC UI port
8. Click on Detect
9. Click on Connect
10. Click on Last Press Process Button And Wait
11. After Process Take a Screen Shot like this
12. Download Screenshot Software Click Here
13. Now Send me (loyalsaadkhan@gmail.com) on your device screenshot data
14. Now Insert Your other Network Sim In Your Modem. Now It Will Ask Unlock Code I Will Provide You Unlock Code Only Rs.450 Via Easypaisa
WARNING NOTE: You should be aware that you use this instruction at your own risk (bricked device, wasted afternoon, etc). Nobody except you is responsible for any damage that is possibly done to your device. If you are not sure: don't know how to install drivers, haven't experience with flashing huawei devices, etc - don't use it.