This is the original iPhone. It was released on June 29, 2007. It is an internet-connected multimedia smartphone designed and manufactered by Apple Inc, with a multi-touch screen. It does not have a physical keyboard, so a virtual keyboard is rendered onto the multi-touch screen. The iPhone functions as a camera phone, a media player and an internet client. The first generation includes Quad-Band GSM with EDGE, unlike the later versions with more advanced UMTS and HSDPA.
The iPhone uses the S-Gold 2 baseband chip.
Uses the CSR BlueCore4 Chip (BC41B41)
Naturally, as the iPhone 2G was a first generation device, it is one of the more hack-friendly iDevices. It is susceptible to Pwnage 2.0 for an untethered jailbreak, and will remain that way since it is a hardware-based exploit. The iPhone 2G unlock is also available and is unfixable by Apple. The iPhone Dev Team created BootNeuter which can remove restrictions the Baseband Bootloader imposes and unlock the iPhone 2G no matter what.