Demand for the iPhone 5 remains very high in spite of two potentially serious issues with the device, according to new data from 451 Research and ChangeWave Research. 19 percent of a group surveyed last month said they were "very likely" to buy an iPhone 5, while 13 percent said they were somewhat likely. A poll from October 2011 for the iPhone 4S generated respective figures of 10 percent and 11.5 percent.