Mobile payments giant Square announced today that it will offer two mobile chip card (EMV) readers to U.S. merchants in the spring of 2015. The headphone jack reader (compatible with iPhone and Android) will retail for $29, while a separate EMV reader that connects to a merchant's Square Stand will cost $39 per unit. This pricing marks a stark departure from the company's … [Read more...] about Square to offer mobile chip card reader for $29