iPhone 11

I bought a iPhone 11 from my friend it was unlocked when I got it now I am locked out of it and I can’t Remember the code to get back into i lt nor my friend can remember what the code was I got it 3 months ago just now trying to use it for cricket service how do I get into phone now or am I out of luck I was hoping iTunes route does anyone know thank you I just really want to use the phone