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  1. January 18, 2017 at 7:06 pm

    To use MS HyperTerminal to send AT commands to your mobile phone or GSM/GPRS modem, you can follow the procedure below:

    Put a valid SIM card into the mobile phone or GSM/GPRS modem. You can obtain a SIM card by subscribing to the GSM service of a wireless network operator.

    Connect your mobile phone or GSM/GPRS modem to a computer and set up the corresponding wireless modem driver. You should find the wireless modem driver in the CD or disk that was provided by the manufacturer. If the manufacturer does not provide such CD or disk with your mobile phone or GSM/GPRS modem, you can go to the manufacturer’s web site and see whether the wireless modem driver can be downloaded there. If the wireless modem driver cannot be found on the web site, you can still use Windows’ standard modem driver.

    Run MS HyperTerminal by selecting Start -> Programs -> Accessories -> Communications -> HyperTerminal.

    In the Connection Description dialog box, enter a name and choose an icon you like for the connection. Then click the OK button.

    ype “AT” in the main window. A response “OK” should be returned from the mobile phone or GSM/GPRS modem.
    Type “AT+CPIN?” in the main window. The AT command “AT+CPIN?” is used to query whether the mobile phone or GSM/GPRS modem is waiting for a PIN (personal identification number, i.e. password). If the response is “+CPIN: READY”, it means the SIM card does not require a PIN and it is ready for use. If your SIM card requires a PIN, you need to set the PIN with the AT command “AT+CPIN=”

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