How to set up i9300 *

APPLE IPHONE 4 BLACK 16GB
HI. I HAVE FOR SALE BLACK APPLE IPHONE 4 16GB. THE PHONE IS IN MINT CONDITION BUT IS BLOCKED IN UK :/ JUST FOR USE ABOARD ONLY.. GOT SIM LOCK ON O2.. COMES WITH CHARGER AND USB CABLE. - NO PAY PAL - CASH ON COLLECITON ONLY IF YOU ARE INTERESTED PLS CALL ME OR TEXT ME ON 0796 000 3795 THANKS