run google maps on the phone data connection.
it should work.
then check wi-fi, wait for icon to go white, uncheck mobile network.
now open google maps.
it should use wi-fi, it does with me.
If it doesnt, it might not have permission to use wi-fi
options - advnaced- applications
menu - edit permissions
under connection ALLOW all.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."