Google says software to blame for lack of Google Wallet on HTC EVO 4G LTE
Sprint "Touch" is not only expected to challenge Google Wallet, but also ISIS, which is the work of three of the top U.S. carriers. Obviously, Sprint's mobile payment system is a real threat to Google and it seemed more than a coincidence that the Google Wallet wasn't playing nice with the new Sprint flagship smartphone.
A Google spokesman has informed The Verge that the HTC EVO 4G LTE's inability to access Google Wallet is due to a "software problem" with the NFC component on the phone that could be fixed with a software update. HTC, Google and Sprint are said to be all working together on the update which is said to be coming soon.
source: TheVerge via AndroidCentral