AT&T has five days to match or exceed new offer

Earlier this month, AT&T announced a $1.6 billion bid for Straight Path Communications, a company holding a portfolio of 5G millimeter-wave spectrum licenses.

Also offers customers new devices for switching to unlimited plans

Yesterday,  Verizon Wireless joined AT&T, T-Mobile and Sprint in being the fourth major wireless carrier in the US to offer unlimited data plans for its mobile customers, signaling the beginning of a price skirmish among the top contenders in the market.