So if I were to buy 1 iphone 5 from Apple store or t-mobile store, the phone come with the sim.
Do I have to call the t-mobile company to activate my number or something?
And.. do I have to get a wireless 4G plan in order to use it?
Can it connect to my home wireless router?

I know it's stupid questions.. but will appreciated if anyone can answer wholeheartedly.