i9001 has 4 physical buttons:
- Power
- Volume Up
- Volume Down
- Home
and two touch-based buttons:
- Back
- Menu
Entering into Download Mode
- Download mode is used to flash new ROM or custom ROM firmware.
- To enter download mode, turn off the phone and then hold down Volume Down + Home + Power.
- If done properly within 1-2 seconds you should see a screen with the green Android robot and the writing "Downloading... Do not turn off target!"
- Pressing Power for at least 8 seconds will reboot the phone.
- If you can't enter the download mode your phone might be Soft-Bricked.
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