Following RBC Capital Markets General Manager Mike Abramsky’s lead, JP Morgan analyst Mark Moskowitz on Friday raised his revenue and EPS estimates for Apple’s 2011 fiscal second quarter. RBC upped its second-quarter revenue estimate from $23 billion to $24 billion on Tuesday, citing pent up iPad demand and strong sales of the Verizon iPhone 4 and newer laptop lines. On Friday, JP Morgan’s Moskowitz wrote in a note to investors that iPhone shipments in the quarter were likely stronger than expected thanks to the launch of the Verizon model and the addition of new sales channels for the GSM version of the popular smartphone. As such, he upped second-quarter estimate from 16.6 million units shipped to 18.4 million. Moskowitz raised his revenue estimate for the quarter to $24.42 billion from his earlier estimate of $23.83 billion, and adjusted his EPS estimate to $5.39 from $5.21. Apple will report its earnings for the March quarter on April 20th.