I can't sleep at night because of my college roommate?

She became my roommate since this last September and she often talks on the phone which is fine until I go to bed. We share the same room.

She picks up her phone literally anytime even when she had been sleeping. Someone calls her after 2 am and she woke up to talk to someone which it lasted for 2 hours. I was up all night and couldn't go back to sleep. She likes to turn the TV on even when she has her earphones on and focused on her iPhone.
Today, she picked up her phone at 4 am and I couldn't go back to sleep since then. This is happening many times. Right now, we're in winter break, so she goes back to her home sometimes so I don't have to deal with the problem.

I asked her once to lower her voice when I'm sleeping and she just says "I understand." I wish I could say to her not to talk on the phone but leave the room when I'm sleeping. Since then, her voice got a little lower but I'm not sleeping well.

I know I should address my concerns to her but,
1. I'm not close enough to her that I can say what not to do.
2. I don't want to risk my relationship with her. She is nice other than that. I want to make it peaceful.
3. She is addicted to her iPhone that I never seen her not holding her phone.

I only talked on the phone once at 4 am and went to bathroom and tried speaking in a lower tone. She was talking on the phone before that time but went to bed. I feel now that I should have went to the hallway if I want her to leave the room.

I want to switch my room but if this is a cultural thing, I feel discouraged to do that.
I wanted to hear your advice before telling to the management office. I'm an international student from Japan and she is an African American. Obviously, we probably have a different value…

I'd like to hear your advice that help me make a decision about this matter.

Even if you guys aren't that close, you are still roommates, which means if you have a problem with her habit then you need to talk to her about it.

Perhaps one day you can just ask her to talk, and let her know about how you feel. Waking up at 4 am to talk on the phone is fine if she's alone in a room, but it's not ok when she has a roommate who has class the next day.

You need to address the problem because both of you share that room, and both of you need to be aware of each other and their needs, so yeah. Just talk it out with her, and you can even grab a mutual friend or something to listen in on the convo as an 3rd person's opinion or something.

You have to be honest and set ground rules or you'll start resenting her. You are the wounded party here. She is wrong because her behavior is infringing on your space. She sounds like the worst room mate ever.

You're quiet and want some peace to sleep and she doesn't. You likely won't change her even if you speak firmly with her.

Look for another room a.s.a.p. You have every right to a good nights sleep. Tell your advisor this is having an effect on your studies.

Tell her, but nicely. Almost like you already said - let her know what a nice roommate she is and how you do not want to hurt your relationship. Simply ask her if she could step into the hallway and talk on the phone.

That is what we used to do in college when we had a late night time phone call. We would go out in the hallway. It isn't unreasonable.

Your relationship with her, your ethnicity or your culture is irrelevant in this matter because your room mates habit of being self absorbed, rude and interrupting your sleep is about lack of courtesy and manners.

Tell her that her habits of talking on the phone and watching TV are disturbing your sleep and you have to come up with some room mate rules to respect one another. First being, no television after 11pm and secondly, phones on vibrate from 11pm to 7am and only taking those calls out of the dorm room as to respect the sleeping person.

Tell her nicely that these nightly interruptions are causing you to lose sleep and you will respect the rules and expect her to do the same as you are here to learn, not listen to her conversations in the wee hours of the morning. You spoke to her once and it fell upon deaf ears, so you must talk to her again.

People addicted to cell phones are the rudest and most self centered people I know. It is horrible that they have these entitlement issues that end up imposing on others around them. How selfish.

Be honest with her and tell her that this is something that you simply are not used to, and is there a way that you can compromise together so that she can still be 'social', and you can get your sleep. Maybe she can take her calls out in the hallway or in a common area if your dorm has one? If not, I would get ear plugs from any sporting goods store or drug store. They work very well.

Tell her politely that she disturbs your sleep.