Last year I reported that in addition to being locked to AT&T, the original iPhone would only accept the SIM it was activated with. As a result, it was impossible to use the original iPhone with another AT&T SIM.
Initially, it was possible to use an iPhone’s SIM with any other AT&T device (or unlocked device). Strangely this stopped working late last year, at least for data access…
Well things have changed with the iPhone 3G. While also being locked to AT&T, the iPhone 3G works with any AT&T SIM once activated. In fact, I was able to use the old Cingular SIM from my other AT&T account ($20 unlimited MEdia Net data plan) with my iPhone 3G!
Conversely, it’s possible to use an iPhone 3G SIM with any other AT&T device (or unlocked device). For example, I’m able to use my iPhone 3G SIM with my Nokia N95, including data access.
So it appears the iPhone 3G is now using a standard $30 unlimited PDA Personal data plan. Perhaps the iPhone 3G will also accept pay-as-you-go AT&T SIMs once activated.
And now for the real questions:
– If you cancel your 2-year iPhone 3G contract and pay the ETF, will your iPhone 3G remain activated during further firmware updates?
– Will you be able to use an out-of-contract AT&T account ($20 unlimited MEdia Net data plan) or a pay-as-you-go AT&T account with your iPhone 3G?