HTC Evo 4G - Wikipedia History. During development, the device was known as the HTC "Supersonic", which was leaked through the Internet and was known as a variant of the HTC HD2 running Android. The EVO was released on June 4, 2010 in the United States through Sprint. The device became the top-selling launch day phone on Sprint, surpassing the Palm Pre, Samsung Instinct and Motorola Razr V3. Directory List Lowercase 2.3 Big | PDF | Internet Forum - Scribd directory-list-lowercase-2.3-big - Free ebook download as Text File (), PDF File (.pdf) or read book online for free. Scribd is the world's largest social reading and publishing site. Open navigation menu