Iphone App !!!

Java - http://en.wikipedia.org/wiki/IPhone_SDK#iPhone_SDK

Apple has not announced any plans to enable Java to run on the iPhone. Sun Microsystems announced plans to release a Java Virtual Machine (JVM) for iPhone OS, based on the Java Platform, Micro Edition version of Java. This would enable Java applications to run on iPhone and iPod Touch.^[45]

Soon after the announcement, developers familiar with the SDK's terms of agreement believed that by not allowing 3rd-party applications to run in the background (answer a phone call and still run the application, for example),^[46] allowing an application to download code from another source, or allowing an application to interact with a 3rd-party application (Safari with JVM, for example), could hinder development of the JVM without Apple's cooperation^[47].

It is clear that Java running on the iPhone is outside the bounds of the iPhone SDK Agreement. The guideline in question is rule 3.3.2, which reads:

3.3.2 — An Application may not itself install or launch other executable code by any means, including without limitation through the use of a plug-in architecture, calling other frameworks, other APIs or otherwise. No interpreted code may be downloaded or used in an Application except for code that is interpreted and run by Apple’s Documented APIs and built-in interpreter(s).

However, some iPhone users have shown that it was possible to install and use a J2ME stack on an iPhone, though it involved jailbreaking^[48][49].

It has also been revealed that there were talks between Sun and Apple concerning the availability of Java on the iPhone, and that Sun was working in that intent with a company called Innaworks^[50][51]. Since it is required that all ARM9 or later processors include Jazelle support, the iPhone includes the hardware for accelerated Java execution.^[52].

Hacking and jailbreaking

The iPhone OS has been subject to a variety of different hacks for a variety of reasons, centered around adding functionality not supported by Apple.

With the advent of iPhone OS 2.0, the focus of the jailbreaking community has shifted somewhat. Prior to iPhone 2.0's release, jailbreaking was the only way to allow third-party applications on the device. Now with iPhone 2.0, native applications are allowed under Apple's SDK terms, although certain functionality is disallowed on the device. These disallowed functions include background processes, and the ability to alter the applications written for the device by Apple. Some began attempts to disable Apple's kill switch,^[59] although these efforts were largely abandoned once the kill switch was proven to only disable Core Location.^{[citation needed]}

There has been a notable shift away from jailbreaking with the new App Store's debut, in most part due to users' acceptance of Apple's compromise on opening up the platform^{[citation needed]}, although there has still been substantial interest from the jailbreaking community, especially with the release of Pwnage Tool from the "iPhone Dev Team" which was released soon after firmware 2.0 for the iPod Touch and iPhone. Some jailbreakers also attempt to pirate paid App Store applications; this new focus has caused some strife within the jailbreaking community.

The other major focus of jailbreaking since 2.0 has been to reverse the SIM Lock that is forced onto most iPhones. The first generation iPhone can be fully unlocked with the iPhone Dev Team's BootNeuter application, and the iPhone 3G can be unlocked with a new beta effort dubbed "yellowsn0w"^[60] later to become ultrasn0w to work on newer baseband as Apple patched the baseband by release 2.2.1 and QuickPwn 2.2.1.

More recently, many efforts have been focused on broadening the Bluetooth capabilities of the iPhone. However, many of the efforts stopped due to the preview of the iPhone 3.0 OS on March 17, 2009, which included among other features, enhanced Bluetooth capabilities.

Within days of the official release of OS 3.0, updated instructions and applications to jailbreak and unlock 3G iPhones running the new OS were released by the iPhone Dev Team^[61].

The iPhone Dev Team stated that the exploits that allowed a jailbreak of the iPod Touch 2G and an unlock of the iPhone 3G will respectively allow the same capabilities on the iPhone 3GS^[62].

On July 3, 2009 geohot released purplera1n^[63], an application to jailbreak an iPhone 3GS running OS 3.0. The iPhone Dev Team subsequently released updated versions of the redsn0w jailbreak and ultrasn0w unlock for the iPhone 3GS^[64].

The iPhone Development Team released an update to their PwnageTool program on October 2, 2009, to enable the jailbreaking of OS 3.1 on the iPhone 3GS.

On October 11, 2009, GeoHot (George Hotz) released blackra1n which enabled users to jailbreak firmware versions of up to 3.1.2, among all other iDevices, the iPhone 3GS and iPod Touch 3rd Generation (untethered support). blackra1n supports iPhone 3GS which has 3.1.2 installed out-of-the-box. blackra1n currently does not support jailbreaking with the 3.1.3 firmware^[65] [2]