network lock for Galaxy Gio GT-S5660 and phone does not detect any external SD card topic

Hello Guys Can any one help me

My phone is Samsung Galaxy Gio GT-S5660

Android V2.3.3

My phone ask a network unlock key When I insert a sim card

How can I cancel the network lock

and my phone does not detect any external SD card after flashing by odin with android v 2.3.3


Please help me