No it wont
Yes. The iPhone 5 works well on European cellular bandwidths.
yes. once an iphone is universally unlocked it will work.
Yes but you will have to unlock it first this can be done at unlockatt.com
Yes
no unless it is unlocked... .
Yes it will. I have mine with Centennials service
yup get it unlocked and you good to go!
No
No sorry the Iphone uses a different type network than the Nextel service.
YES it should although if its jailbroken/unlocked it will lock
Yes. Unlocked iPhones do work on the Orange network in Israel. One just needs an appropriate 3G sim card.
Yes you can unlock your Iphone using remote unlocking service. Get the service from the site http://www.wickedunlock.com/apple-iphone/rs11wp9/ ,and unlock it using unlocking instructions which is given in the site itself. Then you can use your mobile with Vodafone or any other GSM networks.