Can you unlock an iPhone if you don't know the password?

I have the iPhone 4s and my mom took it away and I'm afraid she'll go looking through my texts/pictures. I have a passcode but can she like find that out and access my phone?

Out of what i have tried, no.
i have a cousine that has an iphone and i tried to unlock it but it never worked for me.unless somebody else knows the pass code and tells the person with it, then no out of what i have tried.

No as long as you dont have it like written somewhere, or she tries it enough times til it says check with itunes to unlock itt and she actually plugs it in and goes to itunes she cant

If she takes it to the apple store they will unlock it.

There's a thing on Instagram and you can unlock ur phone