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Mobile Minutes: Google delivers groceries; Amazon?s $50 tablet; Verizon 5G; Cool mobile tech

Google Inc. will start testing a delivery service for fresh food and groceries in two U.S. cities later this year, stepping up competition with online retailer Amazon.com Inc. and startup Instacart Inc.

Amazon.com Inc. has struggled to draw customers to its pricier tablets. So it?s going further down-market.

Your wireless network may not be long in the tooth just yet. But a half-dozen years after it introduced "4G" LTE wireless networking technology to the U,S. market, Verizon Wireless on Tuesday announced the roadmap for its fifth generation or "5G" networks, which promise blazing fast speeds.

BERLIN, GERMANY ? At summer?s end every year, hundreds of tech products see their debut at the IFA Berlin consumer electronics show.