No longer can you just hold down the home button to force quit applicaitons in iPhone firmware 3.0.  This is due to the iPhone 3GS’s voice control feature.  Apple has changed the way you force quit applications.  First you need to hold down the power button untill you see the slide to power off screen.  THEN you can hold down the home button and your application will force quit.

So Tethering is not included in the 3.0 firmware for the iPhone 3G from the start.  You need to do a few simple things to enable it.

From your iPhone visit the site: help.benm.at

Go to Tethering & Internet Settings.
Click where it says Mobileconfigs   download >
Choose USA.
Choose T-Mobile.
Then click Install.

You should now have the tethering option when you go to Settings->General->Network

It should also configure MMS for you as well! (note mms does not work on the 2G iPhone unless you get ActivateMMS2G from Cydia.)

You may also need to take these steps if you get the message: Warning - Potential security breach!

Windows Users:

WinSCP Portable executable
Look for the file “winscp418.ini” located in you WinSCP directory.
Find [SshHostKeys].
Then look for the line that starts with rsa2@22:then has your current iPhone IP Address.
Delete that line and save.
Now try to log in again and accept the new key. You can follow the directions here: WINSCP GUIDE FOR IPHONE

WinSCP Installation package
BE VERY CAREFUL. READ AND REREAD BEFORE YOU DO ANYTHING. MESSING WITH THE REGISTRY CAN SCREW UP YOUR COMPUTER IF YOU DO SOMETHING WRONG
Click Start
Click Run
Type regedit and then hit return
Navigate to: [HKEY_CURRENT_USER\Software\Martin Prikryl\WinSCP 2\SshHostKeys]
Delete only the line that says: rsa2@22:your iPhone’s iP Address
Now try to log in again and accept the new key. You can follow the directions here: WINSCP GUIDE FOR IPHONE

Mac users having trouble with SSH:

Launch Terminal and type “open /Users/username/.ssh/known_hosts”
Then look for the line which has your current iPhone IP Address along with ssh-rsa and ends in “==”
Delete that line and save the file.
Now try to log in again and accept the new key.

If you need to edit or transfer files on the iPhone and you are using windows, WinSCP is the program you need.  Many people have asked me how to transfer files to the iPhone so I made an easy guide to follow bellow.  If you would like me to add anything or have questions please let me know.

First make sure you have ssh and bsd subsystem installed from installer. Next get WinSCP and find your iPhone’s ip by going to (on your iphone) settings > Wi-Fi > “Your selected WiFi” > Look under IP Address- Connect to your iPhone using WinSCP (user: root password: alpine) Change File Protocol to SCP

Just press login after your screen on WinScp

click on the “..” until you see root, then click on the applications folder and put your downloaded .app program inside by dragging and dropping.

To set file permissions(CHMOD) right click on the folder or file and select properties. Most of the time you will have to change the Octal to 0755. If you have any other questions please ask.

If you are having troubles with log in please read this: http://limitededitioniphone.com/guide-winscp-will-not-connect-network-error-connection-timed-out/