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Enter *#0000# on your phone’s keypad. The display shows your phone’s model and product code.
On older phones, these numbers are printed on a white label in the battery compartment, underneath the battery.
Latest software release for Nokia Lumia 800 is SW 1600.2487.8107.12070
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Fix your Nokia phone with a restart, restore or update. These easy fix steps solve more than half of the problems.