TeamWin “No OS Installed” Android Nexus 5

Question

I lost my phone in Peru and had to downgrade to my old Nexus 5. It was rooted so I couldn't update the OS. In trying to unroot it, I [somehow] deleted the OS, and now the phone won't boot. I get to the TeamWin recovery options and it will say "No OS Installed, are you sure you want to..." How can I fix this?



Note: nexus 5 does not allow for external SDs to transfer files, etc.


— physlexic | Sources

Answer

You need to reflash the stock Google Factory Firmware image for your device with fastboot.



Instructions and images are available here. Make sure to use a quality USB cable... we have had several bricking issues flashing firmware on Nexus 5 devices because of defective or poor quality USB cables.


— acejavelin | Sources

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