How do I unlock this iPhone 8?

At the airport during security, this old woman's iphone was going through and I have a bad flip phone so before the woman saw, I grabbed the iPhone and ran away and she didn't see me so now I'm trying to unlock it so I can have it. How do you unlock a iPhone with a passcode? I'm trying to factory reset it so she can't track it

Will re-syncing my iPhone to iTunes affect my playlists?

I've just cleaned my laptop for space, which included wiping all the music from my iTunes library to create more space. Afterwards, I connected my iPhone to the laptop to add some new songs, but the iTunes wouldn't allow me to do so unless I turned the manual library management option on. As I proceeded, I received a warning that because the library on my phone was different from that of the iTunes, it needed to replace my phones library with songs from my iTunes. So then I re-added all the music that I've previously wiped onto the iTunes, so I think I don't need to worry about any songs being truly removed from my phone due to both devices having the same songs. However, what does concern me is whether or not all of my preset playlists will be emptied in the re-syncing process or not.

My stepmom won't buy me a new phone even though she KNOWS the one i have now is horrible and outdated?

So i have a samsung j3 and I've had it for 2 years. This November will be my 3rd year and i don't think it will last till then. As of now, i can barely answer calls from my parents in time, the companion app my stepmom has for me (to restrict access on my phone) keeps uninstalling itself and disabling itself, apps keep crashing, chrome can barely open, the phone is just VERY slow in general. She said once my two years was up i could upgrade to an iPhone but i got grounded two times last year in March and a couple months before Christmas. My dad and her both have nice phones even though she is the only one with an iPhone. I asked for my birthday and Christmas last year for an iPhone. How do i convince her for a new one? I do all my chores, i get straight A's every semester. There's nothing i can do!

Added (1). by the way, i'm 13 in 8th grade. People always make fun of me to the point where it is very aggrivating just because i have a Samsung and they all have the new iPhone x. I do have money but i can't get a job.