Thanks for reaching out to us in order to find out what you should do to download the available software updates for your Samsung Galaxy A03, which has failed to download and after several attempts to troubleshoot on your own but to no avail. We really understand what you are feeling right now—uncertain about what's next. But don't you worry; we are here to assist, provide a quick fix, and offer resolution to your device's problem.
You can try software update via Smart Switch as follows:
Step 1. Connect your device to your computer using the USB cable provided with your device, and then open Smart Switch.
Step 2. If a software update is available, Smart Switch might automatically prompt you to update the software or will display an option to update.
Step 3. Click Update and use the on-screen prompts to download the necessary files.
Step 4. Click OK to proceed. Your device may turn off and on a few times during the update process. When the update is complete, the device returns to the Home screen.
How to update software using Smart Switch
If the problem persists, immediately bring your device to the nearest Samsung Authorized Service Center. Rest assured that our Samsung Engineers/Technicians are competent to assess your device with suggestions, and offer to provide prompt solutions to restore it up to optimum performance.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.
Can you please provide information here on how the download succeeded?
Thanks in advance.