Why I did upgrade?
My 2 years old daughter was around me and was looking for some nice toy, she does not want to play with any existing toys now. Ok, I gave her my very old Google Nexus 5, she liked it and she used it to pretend to make phone calls and taking pictures. The world is calm and I can back to write some code now.
After supper, I checked that Nexus 5, need more power charge and maybe the system is too old, as a programmer who sometimes considers too much about security, the first step is upgrading it, so I did the upgrade.
It is 2021 now, and the phone quickly taught your lesson you should not do the upgrade instead you should just throw it away since it is too old! But my little girl still want to play it and now I just made it totally un-function.
How about reset
Reset back to factory image is the first step I tried, follow some link like Factory Data Reset. Still failed since the factory image was corrupted, now I am in real trouble.
Solution
Some old Android programming knowledge told me that I should just take a look maybe I can get some help from Android website, so yes, I found the Factory Image from Android webpage. I quickly downloaded the Android Studio to start re-program the phone, and failed again with ADB Fastboot error.
Thanks to Stackoverflow found the solution that I need older version of Android platform-tools. After installed the older version of platform tool, Finally, I got the factory image loaded back to phone and it is working again.
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