I paid lotsa-lotsa money, and they finally properly unlocked my iPhone from the carrier. I can’t figure out how they did it—the internet seems to say there’s no way to unlock my versions of the firmware (baseband and bootloader) through software. They didn’t solder anything either. So either I’m an idiot and misunderstood what I read on the websites, or the technician really is a pro and knows some secrets. His reputation is solid, after all. I’m talking about the shop near “Mego,” across from “Tallers.”
In any case, I now have firmware 3.0 installed (in Russian, for some reason), with copy-paste and a landscape keyboard in Notes. And I can install proper GPS software (Navigon) on it, which makes me incredibly happy. Just a little more, and the device will satisfy me in almost every respect.