* Broadcom BCM4330 802.11a/b/g/n Baseband/Radio with Integrated Bluetooth 4.0+HS

* Qualcomm MDM9600 3G and 4G wireless modem (not the expected 2nd generation MDM9615)

* Qualcomm RTR8600 multi-band/mode RF transceiver for LTE bands

The toughest challenge to the teardown, says iFixit, was removing the glass panel display, which is seated similarly in the iPad 2. Technicians used a heat gun to loosen the adhesive, as well as guitar picks and suction cups to lift the glass. They were able to do so without breaking the glass, although "the adhesive on the front is extremely difficult to remove," iFixit says.

This will pose a problem down the road, says iFixit's Kyle Wiens. As Apple pushes , students will be essentially replacing bulky, durable text books with glass text books-and this means breakage and battery replacements will be an ongoing concern for high school administrators.