How I get an email file attachment extension off of my phone iPhone 3G

Dropbox

So I understand where you are coming from. The best way is to use the cloud. What you need to do is download a program like dropbox, box.net or sugar sync; there are tons of these apps but those 3 are the most widely supported. Once you download it on your device you can then download it onto your computer by going to their respective sites. These will automatically sync your documents over the air when both your computer and phone are connected to the internet. But if you have no internet service on your computer here is what you do; go to itunes and plug in your phone> go over to the APPS tab on the top> scroll to the bottom of the page and it will say file transfer. This will allow you to pull files from those cloud apps even without service and voila you have your files on your computer even without Wi-Fi or hotspots. I hope this helps!

EDIT; the best app to use file transfer with is good reader because the cloud apps won't sync directly with iTUnes. You will have to pay for it but it will allow you to connect all your cloud services to it and it can edit and view most files. I use it constantly for my work and I wouldn't be able to live without it even if I wasn't using it for file transfer. Sorry I forgot that in my post, this is an necessity to use the file transfer in iTunes.

Message was edited by: MFS APPLE PRO

The problem is that I don't have access to the internet so cloud computing won't work.  It needs to do it via USB.

that is why you plug it into itunes and your phone will have connection so you take the attachments on your phone, save them to dropbox, and then open good reader. Then you plug it into your computer and open itunes. Plug your phone in VIA USB and access the documents through the apps tab. You will not need wireless for this last step which will be what gets your docs onto your computer. The only time you need wireless is when moving the files from e-mail on your phone to dropbox and good reader on your phone and since your phone is connected to the network that won't be a problem. To reiterate you will not need wireless for the itunes part of these steps. I hope that clarifies things.