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Availability of update depends on Product Code / Region. Also, for Network locked device, update is possible only after an approval from the Operator. As per this, even if there is an update released for the model in general, it need not be necessarily for YOUR phone. Keep on checking thru' phone as well as Nokia Suite...
Try setting up Homescreen shortcuts.. Do you see MAPs in the list that appears. On my Nokia X3-00 also I could not find MAPs in the Menu..but accidentally came across it while setting the Shortcuts...