As soon as Apple officially revealed the iPhone 4
this Monday, current owners of the device were clamoring to find out if they were eligible for an upgrade. According to Engadget, such users can dial *639# to receive a text message from AT&T, detailing their personal upgrade eligibility situation
. Likely, you'll have two options. You'll either be eligible for an upgrade, which means you can pay $199 for the 16GB iPhone 4 or $299 for the 32GB iPhone 4, or you'll be able to pay $200 for an early upgrade, which will involve a contract renewal with AT&T.
You've got until June 24th to sort through the math, thanks to this handy service from AT&T, it shouldn't be too hard. We received our text message within seconds. Looks like we'd better start saving some cash, because our upgrade won't come cheap. [From: Engadget