IPhone not user-replaceable. The iPhone can be charged when connected to a computer for syncing across the included USB to dock connector cable, similar to charging an iPod. Alternatively, a USB to AC adapter (or "wall charger", also included) can be connected to the cable to charge directly from an AC outlet. Some models of the iPhone support wireless charging. Apple runs tests on preproduction units to determine battery life. Apple's website says that the battery life "is designed to retain up to 80% of its original capacity after 400 full charge and discharge cycles", which is comparable to iPod batteries.
IPhone Dev Team the "modem firmware" version in the iPhone Settings app.) ultrasn0w 1.2.4 (and later) uses the same AT+XAPP command exploit found in the 05.13.04 baseband to update the iPhone 3GS's baseband to version 6.15.00 (found in the iPad 3G). redsn0w is a program which allows users to jailbreak their iPod touch, iPhone and iPad by using various exploits. The first version released was 0.7 to jailbreak iOS 3.0 on the original iPhone, iPhone 3G and iPod touch 1G/2G. It is updated frequently to jailbreak additional iOS versions. PwnageTool is an iPhone jailbreaking application for Mac OS X that creates custom iOS