Changing iPhone 4s from American Sprint to UK T-Mobile, can it be done legally?

I want to buy an iPhone 4s from ebay. Its currently BAD ESN on Sprint, can I use it on a T-Mobile phone contract. I'm currently on a contract with T-Mobile, but I wanted a new phone, will I be able to use the new iPhone without changing carriers? Something to do with CDMA or GSIM or something along those lines?

Added (1). Http://www.ebay.co.uk/itm/360525911660?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Anyone have an unlocked iPhone that you are using W/OUT a data plan?

Currently I'm under AT&T, last year I bought an unlocked Blackberry Bold 9700 phone by T-Mobile off of Craigslist. I did it this way so AT&T could not detect the smarthphone and charge me a data plan.

Will this work if I get an iPhone?

Added (1). Therefore I have a blackberry without being charged for internet.

So can I do this on an iPhone? Do you do it? Do you know of anyone?

Added (2). I've had my blackberry for 3 years so obviously not.

Iphone 4 still worth it? Straight Talk plan?

I'm currently wondering whether I should get an iPhone 4 or not. I currently have an iPod touch 4g, and a cheap Metro PCS qwerty keyboard. I plan on buying the phone unlocked from ebay or craigslist for about $200, as AT&T's plan is too expensive for me. I also plan on using straight talk on it, so I will be paying around $45 a month. So my question is, would it be worth it? I'm not really interested in the iPhone 5 or 4S at all.

Can you stop iMessages on iPhone/iPad?

I've been receiving an incessant number of messages, mainly from friends, via iMessage. Always good banter, but they're often sent at inappropriate times! I know you can switch off iMessage but switching it back on can cause problems with people messaging you later. Can you block threads, or remove one contact from a message thread without having to start a new thread?

My husbands EX WIFE is saying i've text her when i haven't? Can she take us to court?

Ok heres the deal… My husbands exwife is a lying conniving caddy person and she can't get over him so she is constantly dreaming up things to try to split us up, anyway, long story made short she called my husband and left a voice mail on his phone saying that i have been texting her and that she is taking us to court, problem is she is saying i've text her with harassing text messages but its supposedly from a phone number that IS NOT MINE and i've never heard of the number, i think personally it is a fake phone number from one of those apps you can download on an iphone (which she does have an iphone) where you can text someone from a different number, she is the type of person that would do something like that just to make her self look good.anyway she is saying she is taking us to court over this and my husband is stressing it thinking she has some case but i HAVE NOT TEXT HER will those text messages hold up in court and is there a way i can prove it isn't me… Sorry if this post is all over the place, i'm a stressed out mess i have been dealing with this crazy woman and her antics for 5 years and i'm ready to pull my hair out. (also i need to add--in their divorce papers it says none of either parties family members is suppose to harass either of them so that is why she is trying to say i've texted her when i haven't because she thinks saying i have harassed her will help her get custody of her kids) SHE'S PSYCHO

What happens if i return an iPhone5 to Apple without the earphones?

Basically my iPhone 5 came with a little scratch on the top so i decided to return it.
They're sending someone from UPS to come and collect it. The only problem is that i can't fit the earphones in the box. So if i sent it without the earphones i assumed they'll take out the earphones of the new iPhone…

BUT. I just found out that I'll be receiving the new iPhone on the same day i give the old one. So what's gonna happen now? Will they charge me for the headphone… Orrr.what? :L