What is ESN and why do i need it?

So i have an iphone 5 and i want to buy an iphone 4 or 4s to customize it and jailbreak it. I don't need an apple warranty on it and i was looking online on ebay for one but most say bad ESN. I don't think this would matter because i'm planning on unlocking it and using Straighttalk or nothing at all for calling/messaging, since i already have a phone. It is basically a supped up IPOD i want to use it for. So does a bad ESN even matter for what i want to use it for?

Added (1). Thanks!

Should I get a TV or an Iphone 5?

My mom is letting me pick from a TV in my room ( I have a EMBRASING disnet princess tv from when I was little) And an iphone ( My phone is old, boring, and when you drop it the back always comes off even with a case and the battery falls out too) I really want both but I can't pick both.

Added (1). And I can't actually whatch tv on it cause it is Way to old. And It is hard to sleep without tv. I used to have a flat screen but A kid broke it. Then I had to get this cause it is the cheepest thing my mom could find. 18$

My Galaxy IV won't receive texts from iPhones?

Today I got a Galaxy IV and tweeted for my friends to text me their numbers and all I got were replies that I did not text back, but they could get my texts. I spent an hour on the phone with AT&T and they couldn't figure it out and I'm currently on endless hold for Samsung. Does anyone know how to fix this? And I tried getting my friends to delete our old iMessages but it didn't fix anything.

What Internet speed do I need?

Me and my friend live in an apartment together. We recently moved in and haven't decided what Internet speed we need. We both have Xboxes with Xbox Live and both have iPhones and we use Netflix. We upload and watch YouTube very frequently. What's a speed to run Xbox Live for both of us and be uploading YouTube?

Someone stole something, what should I do about it?

I had my iPod stole from me a few weeks back. I'm thinking on how to handle the situation. I gave my iPod to an acquaintance of mine and I'm not sure what he did with it. One time, he says he lost it and it fell into the wrong hands and in another time, he tells me that he has it with him and he will give it to me. I don't know if I should get guys to beat him up or confront his parents or get the police invloved. Even if the police is involved, won't they ask for evidence. Most of our talks was usually through one-on-one so i'm not sure if the police can help. I also had my iPod on Find my iPhone but i accidentally removed the device from Find my iPhone. So please help a brother out here!

ICloud greyed out some itunes songs & I can't download them?

My iCould has downloaded some of my songs successfully onto iTunes & my new iPhone but there's a few albums and a couple of songs that have been greyed out and I can't download or even play them?
They were bought through iTunes just like the rest so I don't understand why they can't be downloaded too.
Hope you can help!

Would you say she was spoiled?

My cousin is pretty well off. She has a huge house, horses, a hot tub and pool and gets all the designer clothes she wants for her 14th birthday she took 20 friends to NYC in a huge limo and stayed in the city for hours. For her bday she got an iPhone 5 a new puppy and a Mac laptop do you think she's spoiled

Can't fit charger into iphone case?

I bought this mercury iPhone 4S jelly case and its opening for the charger is there. But when I insert the charger, it feels like the whole thing is not inserted well because its easier to pluck it out. But it charges. Is this normal to have it not fully in or isn't me thinking that is is not fully in the phone? Because the edges of the the white part of the charger is not touching the phone & in fact it is being blocked by the case._.In other words, the opening for the charger is slightly too small.