How to get the device's IMEI/ESN programmatically in android?

Question

To identify each devices uniquely I would like to use the IMEI (or ESN number for CDMA devices). How to access this programmatically?

Answer 1

You can use this TelephonyManager TELEPHONY_SERVICE function to get unique device ID, Requires Permission: READ_PHONE_STATE

Example, the IMEI for GSM and the MEID or ESN for CDMA phones.

/**
 * Gets the device unique id called IMEI. Sometimes, this returns 00000000000000000 for the
 * rooted devices.
 **/
public static String getDeviceImei(Context ctx) {
    TelephonyManager telephonyManager = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
    return telephonyManager.getDeviceId();
}

Return null if device ID is not available.