Remember the checklist:
Once the loader is successfully "pushed" to the device (usually via a tool like Balong USB Downloader), the modem enters a stable state where it can accept firmware files via fastboot or specialized flashing tools. e5573s320 usbloaderbin work
Modifying firmware carries risks. Always ensure you have a backup of your NVRAM/IMEI data if possible before proceeding. Remember the checklist: Once the loader is successfully