Apple is queuing up a large number of new iPhones just for June alone, a new estimate may have revealed. Insiders claiming that the handsets' circuit boards will be made by Tripod and Unimicron also expect Apple to ship 3.5 million to 4 million units of the new smartphone for its June launch. The same sources estimated Apple would ship between 8.5 million to 9 million of the phones in the full summer quarter afterwards.