You are trying to flash a file that is older than your current firmware. You may need a "downgrade" file first.
Disclaimer: Modifying firmware can "brick" your device or void your warranty. Proceed at your own risk. Step 1: Put the Device in "Force Download Mode" e5577s932 unlock file
Avoid expensive roaming charges by using local SIM cards when traveling abroad. You are trying to flash a file that
Switch to a cheaper data provider or a better network in areas with poor coverage. e5577s932 unlock file
Install the "Huawei HiSilicon" or "FC Serial" drivers so your PC recognizes the device in "Download Mode."
Firmware (Major)