They are different networks. Tmobile and ATT use sim cards (GSM technology) and Verizon and Sprint do not use them... they use CDMA technology. You will have to get the iPhone from them to use on their network.
You can't. You have to buy an iPhone that is CDMA bases technology.
This companies use CDMA technology that not need sim card.
U can unlock(jailbreak) the phone, but you can only use it in companies that use GSM technology(sim).
Dont't worry Sprint's 4G network is growing day by day and you don't need a sim to use. Their 4G network will support your iPhone 4G where you will go.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.