Apple iPhone 4 32GB currently on 3 P&G *

Apple iPhone 4, 32GB currently on 3 with a P&G sim. Phone was an insurance replacement in March and is in excellent condition, has a screen protector so screen is unmarked and comes with free gameboy cover. Phone was unlocked when I bought it but have no idea what will happen with another network sim so am selling as blocked to the 3 network... Thanks for looking