Dow Jones Newswires reports that Fran Shammo, CFO of Verizon Communications, said that Verizon Wireless is set to add twice as many customers in the first quarter of 2011 as it did in the year-ago period, driven by the launch of Apple’s iPhone. However, he also claimed that some customers were holding-off in favour of the next-generation version of the device. Sales of Motorola’s Xoom tablet have gone “extremely well,” he said, following earlier reports that this device had performed “relatively well.”