Sprint’s version of the Samsung Galaxy Nexus may launch on April 22nd according to a purported internal document obtained by The Verge. In terms of hardware, the handset is identical to the Verizon Wireless version, however Sprint customers will have access to Google Wallet. The internal document also points to Sprint’s first 4G LTE phone being the LG Viper, which will be available just ahead of the Galaxy Nexus on April 15th. The handset features a 4-inch WVGA display with a 1.2GHz dual-core processor and a 5-megapixel rear camera. The Viper comes equipped with an NFC chip and will also have Google Wallet access as well. Sprint’s LTE network is expected to launch in mid-2012 in San Antonio, Houston, Dallas and Atlanta.