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Step-by-step guide

Here's a brief instruction to set the audio configuration automatically
1. Click the three dots on right bottom corner(May be on difference position on your phone model)
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2. Select settings
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Access the Menu - Tap the button as three dots or when this is absent, check for another icon to access the menu, or from the image, try instead pressing and holding either the back arrow, two rectangles icon, or the square shape, where these sometimes serve as menu shortcuts when the button is not available in view.

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2. Select Settings

3. Start AutoConfig

4. Then the application will try to send commands to the reader with different audio baud raterates. You will see the percentage of progress going up.

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5. Once the proper baud rate is found and the reader receives the handshaking message, it will return acknowledge an acknowledged response to the application. Then the reader will be able to communicate with your phone. For some phones when it shows success after auto-config, you need to re-plugin the reader to send commands and receive responseresponses.
Or if the phone hardware does not meet the required audio jack spec, it will fail when reaches 100% trial.

ps. Make sure to maximize the volume. 

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