It's time to upgrade that old phone you've been using for Google Wallet payments at the local store. Google is now telling Android users that they'll have to run KitKat to use Wallet's tap-to-pay feature from April 14th onward. The company prefers the newer OS' "improved experience" for NFC-based payments; in other words, it would rather use a more universal, cloud-based approach to processing your banking info. You may be out of luck even if you are using KitKat, though, since the new requirements rule out support for the EVO 4G LTE, Galaxy Note 3 and 2012-era Nexus 7. We suspect that many Wallet fans are early adopters that already carry qualifying devices, but Google's move could have many shoppers looking for alternatives.