With the second big release push underway, Apple's total addressable market will increase by 78-percent from 370 million to 660 million, as it launches in 43 total countries by Friday. Analyst firm Piper Jaffray released a note on Friday claiming the above figures, with research providing a conservative estimate of 4.1 million iPhone units sold during the September quarter. Gene Munster, analyst for Piper Jaffray, maintains a buy rating on Apple stock, showing medium volatility.

Munster states that their estimates are conservative since it will not account for the subsequent 22 country release that recently transpired. He also notes that Apple shares are likely to trade on iPhone unit volumes, with expectations of a positive outlook on share price.

Apple is facing some difficulty with the iPhone 3G, more specifically the iPhone v2.0 operating system, which has been causing users' units to freeze or otherwise become unusable. The issues could cause some damage to the iPhone's reputation, and may impact sales. Promises of a fix are set for September.