Upgrading the Firmware for ST-25
To upgrade the firmware for ST-25, go to the terminal. Depending on the configuration, you will have one of the two screens below:
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ST-25 Terminal configurations
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Press the button 
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ST-25 Terminal options
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Go to Settings and write the password (please contact your provider!):
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ST-25 Terminal inserting the admin password
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Press Upgrade and upgrade the terminal:
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ST-25 Terminal admin menu
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This is a message with latest firmware installed.
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ST-25 Terminal firmware install
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Or:
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ST-25 Terminal new firmware available
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Here you can also install the Core Service or Reinstall the whole terminal.