Found a lost iphone 3g with a passcode and I need to get into it

iPhone 3G cannot use iOS 6!
the latest iOS for iPhone 3G is: iOS 4.2
- iOS 6 is possible only on iPhone 3GS / 4 / 4S
iPhone 3G 8 16 GB Specs iPhone 3G A1241 MB046LL 2347 iPhone1 2 EveryiPhone...

if its icloud locked there is no way to do it because you need the icloud account to acces it. if it is a 4 digit code or phrase code a hard reset should do the job as long as the person that lost it or had it didnt lock it wit icloud. let me know if you need more help

It's easy to see if u have a 3g or not look for the compass app. If it's there you have a 3g.

I did a little searching and i found this simple way of bypassing the password at least temporarily. Just watch this short video.

http://www.wonderhowto.com/how-to-unlock-your-iphone-3g-without-knowing-passcode-422929/

Hope this helps and good luck with your court case.

iPhone setting:*
- Auto-Lock: 1 Minute;*
- Passcode Lock: On, require passcode immediately, after 15 min or 4 hours etc;*
- Network: Turn 3G Off

Scenario 1: Home screen is active with screen on*
1. Press power button for seconds until asked to '"slide to power off"
2. Slide to power off
3. press power button to turn on iPhone
4.*When asked to enter passcode, touch the "Cancel" key, then slide to unlock
5. bypassed passcode

Scenario 2:*
1. On the screen of being asked to enter passcode, press power button for seconds until asked to '"slide to power off"
2.*Slide to power off
3. press power button to turn on iPhone
4.*When asked to enter passcode, DO NOT touch any key on the screen, press power button for seconds until asked to '"slide to power off"
5. Slide to power off
6. press power button to turn on iPhone
7.*When asked to enter passcode, touch the "Cancel" key on the right bottom corner, then slide to unlock
8. bypassed passcode

Notes:
1. When Network setting changes to Enable 3G: ON, "3G" signal shows up, passcode CANNOT be passed through
Go to a underground parking lot or a lift where 3G signal is weak, when 3G signal switches to "E" (Edge), passcode CAN be passed through following above steps
2. When no 3G or Edge signal, above steps don't work

Conclusion:
Seems passcode security is related to network status
Possible security hole under Edge

forgot iPhone 3G passcode? The tutorial will help you much: http://www.windowspasswordsrecovery.com/iphone/forgot-iphone-passcode.html

If you have forgotten your iPhone’s Passcode you will need to restore your phone via iTunes.

1. First you have to put your phone into the restore mode which is a slightly fiddly process.
2. Plug your iPhone into your PC or Mac with the USB cable
3. Press and hold the power button at the top and then slide to power off the iPhone
4. Press the power button to power the iPhone on and keep it held while simultaneously pressing the home button
5. After a few seconds a yellow alert triangle will appear and the iPhone will say it is iPhone Restore Mode.
6. Open up iTunes and click on the Summary tab
7. Click on Restore to restore your iPhone. This will reset all your iPhone’s setting to the factory defaults, including the Passcode.

You should then follow these steps below to activate the passcode again.

1. Click the Home button to bring up the main menu
2. Click on Settings
3. In the Settings screen click on General
4. In the General screen click on Passcode Lock
5. This will open the Set Passcode screen. Enter a memorable 4-figure code and re-enter it when prompted
6. You will now be at the Passcode Lock screen. You can change when you are prompted to enter the Passcode. The default setting – Immediately – means you will be asked to enter it as soon as your start using the iPhone. But you can change the setting so that the prompt appears after a certain period of use
7. Press the Home button to return to the main menu.

remember your password

It depends on the severity and the settings you have given the iPhone and whether you have the computer that you synced your iPhone with... Here's the full explanation. I would recommend reading the second paragraph first, but the solution if you really forgot your password is in the first paragraph. 
==If you have the computer you synced your iPhone with==
If you cannot remember the passcode, you will need to restore your device on the computer that was used to originally sync the iPhone or iPod touch so that you can reset your passcode and resync the data from the device (or restore from a backup). If you restore on a different computer that was never synced to the iPhone or iPod touch, you will be able to unlock the device for use and remove the passcode but your data will not be present. Refer to "Updating and restoring iPhone and iPod touch software."

"If you enter the wrong passcode too many times, you'll see a message that says "iPhone is disabled" and to try again later. If you repeatedly enter the wrong passcode, iPhone or iPod touch will be disabled for longer intervals, before you can try again. After too many unsuccessful attempts, you won't be able to try again until you connect to the computer you normally sync with. Note that starting with iPhone 2.1 software, there is a setting to cause the device to erase itself after 10 consecutive incorrect password attempts. This setting is off by default. It  can be turned on by tapping Settings > General > Passcode Lock after you enter a correct passcode." 
The full article can be found here: http://support.apple.com/kb/HT1212
==If you don't have the computer you synced your iPhone with==
If you don't have the original computer the iPhone synced with, the only solution is to force your iPod Touch into recovery mode and then restore it. You will lost all the data on the iPod Touch, but after this method is done, everything will work. You can find the steps to solving this problem here: 
http://support.apple.com/kb/HT1808?viewlocale=en_US

our son he was on the iphone 3G and he changed the passcode and he forgot what he preesed and how would i get my old passcode back?