The issue focused on Walgreens's electronic purchases and customer reviews of generic goods in Mexico. Many retailers bought tablets or monitors from Walmart using counterfeit phones. Other electronics vendors tried to tempt shoppers into buying iPads with iPhones that display digital cameras. In response, Walgreens fought back by convincing consumers that smartphones could provide Internet access without hackers stealing devices. The internet technology giant continues to lobby Congress for tougher cyber regulations. But companies say they've learned lessons about software vulnerabilities that hackers don't necessarily exploit: Computer networks used