if you bought if with orange or have jailbroken and unlocked it then yes is should work fine.
If your 3GS is locked, you can't insert a SIM card.
yes a plateau sim card will work on the iphone all you have to do is go to plateau and have them unlock it.
Yes. Unlocked iPhones do work on the Orange network in Israel. One just needs an appropriate 3G sim card.
Orange 3g is a network that is used to provide phone and internet in the UK. The SIM card you are going to need will vary with the phone you are using. Orange offers SIM cards with min plans for about $25. This price is for the SIM card used in the iPhone. If you have an iPhone 4 Orange also offers their micro SIM, which is smaller than a standard SIM for the same price
No, You cannot use reliance CDMA sim card (or) any other CDMA card sim card on Apple iphone 4s. Any GSM Sim card will work on factory unlocked Apple iphone 4s but not CDMA sim ONLY IN INDIA.
no it will not
No
Of course, the iPhone 3G and/or the original iPhone will take any normal sim card; the 3G iPhone will take the 3G sim as well.
Assuming the SIM card is the correct size for the iPhone (ie not a micro SIM) - there's no reason why not. Since you say it's unlocked - it should accept any networks SIM card.
Yes
yes
well...the iPhone will work but not the SIM card..