• The SIM slot is gone. According to Apple, the SIM card and SIM tray were the only user-serviceable parts in the AT&T iPhone 4. Apple now says “iPhone does not contain any user-serviceable parts.”
• We believe the additional break in the antenna enclosure on the right side of the phone is a result of the switch from GSM to CDMA. An antenna’s operating frequency is directly dependent on its size and geometry, so the change-up required an antenna overhaul.
• Apple has removed the counterweighted vibrator motor in the corner of the phone and switched to a different vibrator design that’s now placed near the battery connector. The iPhone 4′s vibrator received a complete makeover. Rather than using a rotational electric motor with a counterweight, the Verizon iPhone appears to utilize a linear oscillating vibrator for call/message alerts. Our tests show that the new vibrator has quieter, softer feel, and makes a better sound when on a table.
• The Qualcomm MDM6600 chip supports HSPA+ data rates of up to 14.4 Mbps and CDMA2000® 1xEV-DO Rev. A/Rev. B. It supports both GSM and CDMA—which means that Apple could have supported GSM!
Why didn’t they? It may be that it was easier to design antennas for a CDMA-only phone — this phone supports two cellular frequency bands, while Apple supports five bands in the GSM version. Of course, there’s no way it could be a real “world phone” without a SIM card slot.
Read more and see all of the teardown photos here.
[Attribution: MacRumors. Thanks to MacDailyNews Reader "Edward W." for the heads up.]