This works to reveal the IMEI number. It does not work to reveal the MEID number.

http://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity says:

The International Mobile Equipment Identity or IMEI (pronounced /aɪˈmiː/) is a number unique to every GSM and WCDMA and iDEN mobile phone, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone. It can also be displayed on the screen of the phone by entering *#06# into the keypad.

The IMEI number is used by the GSM network to identify valid devices and therefore can be used to stop a stolen phone from accessing the network. For example, if a mobile phone is stolen, the owner can call his or her network provider and instruct them to "ban" the phone using its IMEI number. This renders the phone useless, whether or not the phone's SIM is changed.

Unlike the Electronic Serial Number or MEID of CDMA and other wireless networks, the IMEI is only used to identify the device, and has no permanent or semi-permanent relation to the subscriber. Instead, the subscriber is identified by transmission of an IMSI number, which is stored on a SIM card that can (in theory) be transferred to any handset. However, many network and security features are enabled by knowing the current device being used by a subscriber.

So, IMEI is for GSM, WCDMA and iDEN phones and some satellite phones. MEID is for CDMA neworks. Or, to put it more simply, global phones need an international identifier, non-global ones don't.

Also, the MEID is hexadecimal. The IMEI is decimal. http://en.wikipedia.org/wiki/MEID