Have I been blocked?

I'm calling a friend and she has an iPhone. When I dial the number there's one ring and then there's the automated "i'm sorry but the person you've called doesn't have a voice mail box set up yet goodbye".

Why does my iphone 8 keep locking me out?

I'm the only one who knows the knows the passcode, and i'm not dumb when it comes to downloading apps

i can restart the phone twice so it fixes and i can get back in, but after that i'm locked out until my phone gets disabled

like really apple i'm not buying your 1200 dollar phone