Loading European firmware/baseband into a US iPhone
I've used the search engine and searched the web but I can't seem to find a question to my answer. Here's the story:
I live in Belgium, and my dad recently got me a jailbroken and unlocked US iPhone 4. After having used the 2G and 3G, I really got tired of always needing to jailbrake and unlock them in order to use them over here. Now that I have the iPhone 4, I was wondering if there isn't an alternative to jailbreaking.
Over here in Belgium, all iPhone being sold are factory unlocked. This got me wondering, what is it that makes a US iPhone factory locked and a European iPhone factory unlocked? My guess was that it's probably something inside the software, and this got me wondering if it's possible to copy/load a European firmware/baseband into a US iPhone. By doing this it would turn the locked US iPhone into a European unlocked iPhone.
So, is this possible? And if so, how?