Issue - IMEI - HTC Flyer Tab [Telephony Manager]

I have HTC Flyer tab with version Android 2.3.4. I am not able to retrieve the IMEI number through TelephonyManager.getDeviceId(). It always return null.

Can somebody try to read out the IMEI on another device. I would like to know whether it is a Google or HTC problem.

This is a 'GSM' device. And it is brand new, didn't have any OS update.

FYI, Included Manifest:

My programs on sumsung galaxy, Motorola xoom, and all smartphones working well.


Some of the tab devices do not have IMEI number. You can get WI-FI MAC address of the device.

WifiManager wifiMan = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInf = wifiMan.getConnectionInfo();
String ID = wifiInf.getMacAddress();

Class SystemProperties = null;
SystemProperties = Class.forName("android.os.SystemProperties");

//Parameters Types
Class[] paramTypes = new Class[1];
paramTypes[0] = String.class;

Method get=null;
get = SystemProperties.getMethod("get", paramTypes);

Object[] params = new Object[1];
params[0] = new String("ro.gsm.imei");

IMEI = (String) get.invoke(SystemProperties, params);

if you are getting null with TelephonyManager.getDeviceId(), use

Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID);

for example:

final TelephonyManager mTelephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
if (mTelephony.getDeviceId() != null){
AndroidDeviceId = mTelephony.getDeviceId();
AndroidDeviceId = Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID);

even ANDROID_ID is not secure to use:

More specifically, Settings.Secure.ANDROID_ID. This is a 64-bit quantity that is generated and stored when the device first boots. It is reset when the device is wiped.

ANDROID_ID seems a good choice for a unique device identifier. There are downsides: First, it is not 100% reliable on releases of Android prior to 2.2 (“Froyo”). Also, there has been at least one widely-observed bug in a popular handset from a major manufacturer, where every instance has the same ANDROID_ID.

but i recommed use this method suggested in Android Developer´s Blog: Identifying App Installations:

public class Installation {
private static String sID = null;
private static final String INSTALLATION = "INSTALLATION";

public synchronized static String id(Context context) {
if (sID == null) {
File installation = new File(context.getFilesDir(), INSTALLATION);
try {
if (!installation.exists())
sID = readInstallationFile(installation);
} catch (Exception e) {
throw new RuntimeException(e);
return sID;

private static String readInstallationFile(File installation) throws IOException {
RandomAccessFile f = new RandomAccessFile(installation, "r");
byte[] bytes = new byte[(int) f.length()];
return new String(bytes);

private static void writeInstallationFile(File installation) throws IOException {
FileOutputStream out = new FileOutputStream(installation);
String id = UUID.randomUUID().toString();

Category:android Time:2011-10-24 Views:0

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