The user-removable back cover comes off quite easily with some prying.

Unfortunately, Samsung and Sprint decided not to include NFC support in this variant of the Galaxy S II, which means no Google Wallet support either.

Unsure what an NFC module looks like? Check out the Nexus S teardown.

We love phones with batteries that are easy to replace, and this device fits that mold.

The 1800 mAH Li-ion battery in the Samsung Epic 4G Touch has a claimed battery life of 8.7 hours of continuous talk time and 10.5 days on standby.

Compare this with the Galaxy S II's 1650 mAh battery.

For those of you who prefer real world battery life tests, Engadget's reviewers easily managed 12 hours of moderate usage without any need to charge the battery.