I have a Nokia 5800. I have trouble using GPS. How to activate the GPS in this phone? Do I need any additional programs? Even the GPS signal is giving me trouble. Whenever I check satellite status it will always show that the phone is getting very strong signals, but when I go back to the map it will be searching for GPS signals or satellites. How to activate and use the integrated GPS in Nokia 5800? I would really appreciate your useful information regarding this. Thanks.