Despite widely reported problems with the antennae design of the iPhone 4, most analysts say demand for Apple shares and iPhones remains high, according to the Financial Times.
Steve Jobs, Apple chief executive, attempted to quell consumer discontent on Friday by offering to give every owner a free case to prevent the two antennae from being bridged by users' hands.
He said Apple would refund those who had paid for a case already and would give money back to anyone returning their phones.
But Steve Jobs has angered competitors by saying they have similar problems, naming Samsung, HTC and BlackBerry maker RIM.
"Apple's attempt to draw RIM into Apple's self-made debacle is unacceptable," RIM co-chief executives Mike Lazaridis and Jim Balsillie said in a statement.
They said Apple's claims were a deliberate attempt to distort the public's understanding of an antenna design issue and deflect attention from Apple's difficult situation.
But some analysts predict Apple will still sell up to 71m iPhones in 2011 and third quarter sales will beat expectations of $14.6bn.
If Apple's margins can survive the antenna debacle, the cost of supplying cases and a severely stretched supply chain, iPad accessories sales will restore balance, analysts said.