How to activate tmobile SIM card for iPhone?

I upgraded to a Tmobile iPhone 5s that came in the mail last night. It came with a new, small SIM card in the slot, so I'm using it since my old one's too big. How do I activate it without going to the store?

How to redeem a TicketMaster voucher on ticketmaster.co.uk?

I'm trying to order tickets to WWE Live in Birmingham on May 18th and I have a £80 TicketMaster gift card as a Christmas present. How do I redeem the voucher on the website? (I'm using Safari on iPhone) I've been through the whole transaction process and it only gives me the option to pay by credit card.

I can't get 3G on my iPhone 4?

I had a Samsung galaxy s3 that I could get 3G basically anywhere I went. I bought an iPhone, but I can't seem to get 3G at all. I can only access internet outside of my house if I'm signed up to free Wi-Fi. I have made sure that the 3G is on, but it just doesn't work. Any way I can change this?
Merry Christmas and thanks for the help!

I'm starting to think I'm not the favorite twin?

This Christmas. I got an iphone 5c and I was excited. Really happy and gave my parents a giant hug and stuff. Afterwards though, I realized that my twin sister got an iphone 5s. Much more expensive and has better features. This I started realizing that my parents might not love me as much.

Now hear me out.
Before you start saying I'm ungrateful, I just had this epiphany.

You see 2 years ago, my parents went out with me to buy a macbook air. I bought it with my own money and my dad bought a macbook pro with his money.
After a couple of months, he gave that macbook pro to my sister because he doesn't use it often.
Same thing with the ipad 2. He gave to her because he doesn't use it as much.
This I felt was understandable. He wasn't using them.

When me and my sister started going to different colleges. I kept the old car while my dad got my sister a brand new car. 2013. This was understandable because at least the old car was payed off and I don't have to worry about bills in the future.

But now, to give her a obviously more expensive phone with some better features…
I really feel like I'm not the favorite.

Do you think this is unfair? Or am I being ungrateful?

My new iPhone can't make calls, send texts, and has no service?

I just got a new iPhone 5S. I plugged it into iTunes to transfer my backup from my current iPhone 5. All my apps, songs, pictures, and email transferred. I can use my apps and get online. I just have no service and can't send texts or calls or anything. I can still call and text from my old phone.
How do I fix this?