Originally Posted by duke69111
You say "reset the wallet app before doing..." by that I assume you mean clear data and cache in the app settings, before wiping, installing an update, nandroid backup, ect.
Just wanting to be clear, so I can hopefully avoid this problem.
No. that is not what he means. Go into the wallet app and go to menu>settings>reset google wallet.
Doing it from the android OS application settings menu will delete cache etries, but will not clear the certificate/whatever it is from the Secure element on the NFC chip. Only resets from inside the wallet app clear that.