Click download

This is a fast way to boot your android device into download mode or recovery mode without using any buttons or computer
To use this method your device must be rooted

Steps :
1. Download and install "Terminal Emulator" App
2. Open "Terminal Emulator" and type
Then enter
It will ask for root permission
3.A. To boot into download mode type
Then enter
3.B. To boot into recovery mode type
Then enter
Done!
Downloads :
Android Terminal Emulator App HERE