Why won't Apple give out the unlock code for an iPhone 3Gs when the contract was honored and I am still an AT

Question

Why won't Apple give out the unlock code for an iPhone 3Gs when the 2  year contract was honored and I continued to be an AT&T customer with an iPhone 4. I wanted my old 3gs unlocked so my daughter could use it overseas when she is deployed. AT&T service over there *****, the international plan was not worth it. The individual SIM cards per country are much more reliable and cheaper. Teslestial in Iraq and Afghanistan, Telecom in Croatia,Vodafphone in Germany and Italy.  Why Apple will not unlock these phones for our military to utilize is incomprehensible to me.  These young men and women are fighting for these Apple people to go to work every day, safe, to live lives they have become accustom to yet releasing a phone to use on another network they can't do at least for the military.... WHY APPLE??  WHY?   A good excuse not some of the many lame excuses I have received on the phone many times. AT&T states it is Apple that will not allow them to unlock the phones...  Please tell me why?  All I want Is my daughter to have a phone I trust, to be able to call me when she is given the free time to do so and I trust the apple phone.
Apple, please reconsider your stance on this issue.  I am having a hard time understanding why you will not unlock the iPhone. 
A simple code could allow me to talk to my daughter while fighting for our country the Great USA.  Apple should be on the front line and enabling those fighting for our life, liberty and pursuit of happiness to use unlocked phones on reliable local GSM networks.
I honestly hope that someone who has some sort of authority to begin allowing the release of unlock codes, and not forcing people to unlock their phones with some program produced by some hack just to be able to use your wonderful phone.  That is is in a nutshell, People love the iPhone so much that they want the ability to use it on the most reliable GSM carrier available to them.  That should be a major compliment. Even men and women on the front line want your phone. I agree, my service is not the best where I live either, love the GSM technology so stay with it, but if I had the ability to change to the other GSM network that has much better coverage in this area of the country I would change. To change now I would not have my iPhone and that I will not part with. 
Apple, please reconsider opening up the lock code and allow your gem of a phone to be used by many more people in many more areas and most importantly overseas fighting for our country.  I know if this is really thought about Apple would understand and come to the conclusion to release the unlock codes, and stop the people from hacking in to use the iPhone on other networks.
I would love for my daughter to be able to use my iPhone 3gs while fighting for our Free country.
A response would be appreciated.
Thank you.
An Apple customer for 10 years, phones and computers.
P

Answer 1

Defiled:
I did sign a two year contract and completed that contract. The 3gs is no longer in service. My daughter is going overseas to protect you and your family. I was attempting to find a way for her to have a reliable phone that could offer her some connection with home as she travels through the middle east.  She travels in missions all over.
At&T unlocks other phones of theirs why not the iPhone?  AT&T says that Apple will not give them the code, it is not the carrier.  If I would have known this situation would have come up I would have bought and unlocked 3gs phone"Deggie" .  My main complaint is that Apple has not good excuse as to why they will not allow their phones to be unlocked from services well, AT&T .  I bought the phone full price, completed the contract terms, even went for and iPhone 4 with another2 year contract, along with owning an apple computer... I love the product.  My main issue is give me a good answer as to why you won't allow a phone to be unlocked. It doesn't hurt Apple, People still have to buy the phones from them, and use their App store and iTunes.
Sorry, just upset about my daughter heading over there, boots on the ground, and just pray she will be safe. Would have liked to facetime her while she is in the airports and in specific areas allowed for that.
Please don't come down on me for asking this question. I understand all the contracts etc.... but to single out the iPhone specifically to not unlock after contract is over does not seem fair.
Thank you for your responses.