The HTC Aria at least could also cold boot from USB power. The first method developed for bootloader unlocking on it required an SD card with the unlocking software be inserted at a particular time during the boot process. And the SD card slot was under the battery!
Edit: now I have to double check myself; signing back into some old posts maybe I’m not remembering the process correctly. It was maybe 16 years ago, and I’m getting old! :-)
The HTC Aria at least could also cold boot from USB power. The first method developed for bootloader unlocking on it required an SD card with the unlocking software be inserted at a particular time during the boot process. And the SD card slot was under the battery!
Edit: now I have to double check myself; signing back into some old posts maybe I’m not remembering the process correctly. It was maybe 16 years ago, and I’m getting old! :-)