It's a bittersweet feeling when one of the most revolutionary devices to hit the market ends up on a carrier's EOL (End of Life) list. While it's generally realized that the device itself is old hat, its retirement indicates that newer, better, and more powerful devices are upon us.

This is the case for one of Android's most celebrated success stories: the HTC EVO 4G. According an internal Sprint document obtained by SprintFeed, the white variant of the EVO 4G will meet its demise at the end of this week, while the black one will hang on for just a while longer -- at least until the first part of October.

The EVO 4G revolutionized Android and how the world sees it. It was the first Android device to pack now-standard features, such as a 4.3-inch display and a front facing camera. When the iPhone 4 was released, the EVO was the Android badass put on the front lines to do battle. It is with great humility that we lay this phone to rest, sending it off to join other Android greats such as the Motorola Droid and the G1.

Also joining the EVO on Sprint's deathlist is the Kyocera Echo, the dual-screened oddity that was viewed as more of a novelty than a relevant handset in the Android space. The fact that the Echo has only been out for five months is a pretty good indicator as to how well it was (not) received by the Android community, so its entry on this list isn't much of a shocker.

The Echo will see its last days alongside the black EVO 4G in "early October."

[via SprintFeed]