It may not be as big a surprise as Google hoped it would be at this point, but the company has now officially announced its NFC-based Google Wallet mobile payment service, complete with backing from a number of retail and financial partners including Subway, Macy’s, Wallgreens, Toys ‘R Us, First Data, Citibank and MasterCard — plus Sprint on the carrier side. In the case of MasterCard, that partnership means Google Wallet will be fully compatible with the PayPass contactless payment system. Trials are beginning immediately, with a full release planned for this summer. Also announced is Google Offers, which will deliver an “offer of the day” to your inbox, and let you seek out other offers from retailers. Developing… Gallery: Google Wallet Gallery: Google Offers Google Wallet mobile payment service, Google Offers announced originally appeared on Engadget on Thu, 26 May 2011 12:08:00 EDT. Please see our terms for use of feeds . Permalink