To find the IMEI of any GSM phone, dial *#06# (yes, these 5 characters exactly: star, pound, zero, six, pound) on the keyboard. The IMEI is a number with 15 digits in the format xxxxxx-yy-zzzzzz-u or xxxxxxyy-zzzzzz-u. On some Sony Ericsson devices, 2 more digits can be added. They are not really part of the phone's IMEI, and are not taken into account for Kylom software registration purposes.

Here is the menu command from the main screen of your Epoc ER5 machine (Psion Series 5, 5mx, revo,...):





The Unique Id of this machine is 1000-118A-EDD7-FEF3

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... and the Serial Number of this Nokia Communicator 92xx is 2af9b: