Android 2.3.4 TelephonyManager

I updated my HTC Flyer to Android 2.3.4. Now I am not ab开发者_如何转开发le 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.

Sorry for the bad english.

I have five HTC flyer, three of them have been updated. Unfortunately, only the updated flyers can't get the IMEI code via the function TelephonyManager.getDeviceId(). My programs on sumsung galaxy, viewpad, and these un-updated flyers work well.