AT&T Tethering on Samsung Focus (SGH-i917)

Make Sure you have Zune installed on your PC and then perform the following steps. This will disable the Zune Sync feature via USB, and enable Modem. Put the phone back into Diagnostics mode and select Zune sync to re-enable the sync.

  • Dial ##634#
  • Once Diagnostics opens, Dial *#7284#
  • Switch to “Modem, Tethered Call” and wait for the phone to restart.
  • Connect Phone to PC via USB and wait for drivers to install
  • Please Note: Windows 7 64 bit users will need to manually download the Samsung phone drivers and direct windows to that install directory during driver installation

  • Create new connection in Network and Sharing Center
  • Number to dial: *99***1#, User: WAP@CINGULARGPRS.COM Password: CINGULAR1, and connect.

If all goes as planned your new windows 7 phone can be used as an air-card.


EDIT: For those having issues downloading it directly from Microsoft Update (Recommended) here is a copy that you can directly download from my

19 thoughts on “AT&T Tethering on Samsung Focus (SGH-i917)

    1. You need an internet connection during this part. This error is because it cant connect to windows update to download the needed drivers.

    1. When you plug your device in after setting it in diagnostics mode, Driver installation will launch in your system tray. Here is the step by step:
      -Click the icon to open the Driver Installation window, and once it fails it will prompt you to download Samsung USB Modem Driver Package.
      -Unplug your device, Install this package, and remember where the installation directory is.
      -Plug your device back in and go into Device Manager
      -Right-Click the Samsung-i917 device with the exclamation mark and select update driver.
      **Select the Directory where you installed the USB Modem Driver Package
      -2 more devices will appear and you need to update those drivers manually as well using the same directory.
      -Once Complete, make the connection following the steps outlined in my post.

  1. The question that was posed, still has not yet been answered. JM asked, “Where does he download the proper drivers.” He and I still need to *Help* windows driver installation utility *Find* the driver. It doesn’t happen automatically, as suggested.

    1. It should happen automatically, provided you have an internet connection, but if it doesn’t I added a link to the drivers in the post.

  2. After following all steps and clicking “connect”, I get Error Code 628: The connection was terminated by the remote computer before it could be completed.

    Any ideas what to do next?

    1. Do not use any AT&T Connection Managers… Read the instructions above. There is no “connect” button or option. After setting it up, you just plug it in and you browse the internet.

  3. Thanks for your reply. I’m not referring to any AT&T Connection Managers, rather the new network connection in network/sharing center. Based on the need to dial a number, I assume the new connection is a dial up and per the instructions, the final step is ‘connect’. That’s when I get the error. Am I interpreting this instruction wrong?:
    •Create new connection in Network and Sharing Center
    •Number to dial: *99***1#, User: WAP@CINGULARGPRS.COM Password: CINGULAR1, and connect.

  4. If you cannot get Windows Update to download you a drive, from device manager, dbl-click the i917 and select download driver, let windows search online for it and you are good to go.

  5. For the other 2 devices in device manager that also need to use the same drivers as the device itself, Bluetooth Peripheral and Wimedia Device – if, like me, you don’t have the drivers downloaded then you are stuck.

    Also, I too am getting the 628 error and have tried various things like turning off encryption on the connection, turning on logging but no lcu. Suggestions are appreciated

  6. @Mikeb
    Yes the drivers are for Win7 64bit. I fixed the download link so you can download them now. Let me know if you have any other issues.

    1. @tex269
      I have never had AT&T charge me for tethering, but AT&T have said they will start throttling heavy users. Which means if you tether, be prepared for 56k dial-up speeds…

  7. I completed your tethering instructions for the i917 and checked device manager to make sure the drivers are there. When I click connect in the dial-up window I get “error 619: A connection to the remote computer could not be established, so the port used for this connection is closed” I sure could use some help. AT&T and Samsung could not or would not help. Thanks

    1. Hi Merrilee – thanks for sharing the extra initialization command – this was exactly what I needed to get a friend up and running – however, I had to change the “smartquotes” in the command to straight quotes – like this: AT+CGDCONT=1,”IP”,”wap.cingular”

      Thanks again!!!


  8. This also works with Windows 8! Righteous!!

    Here’s the ONLY way to make it work- I suppose you need to do this with Win-7 64-bit as well. This slightly modifies the procedure listed above:

    2. Once Diagnostics opens, Dial *#7284#
    3. Switch to “Modem, Tethered Call” and wait for the phone to restart.
    4. Download drivers from the link at top of this page, repeated here:
    5. LEAVE PHONE DISCONNECTED FROM COMPUTER AT THIS POINT. Save and unzip to a folder of your choice. Install drivers. If it asks if program installed correctly, click yes.
    7. In devices and printers, you should see three new devices, one of which is labeled Samsung Modem. If you don’t see this, disconnect your phone, restart your computer and reconnect your phone. if you STILL don’t see this, disconnect your phone, reinstall the drivers again and repeat step 6.
    8. Disconnect (DO NOT DISABLE) any wireless connection you are using at the moment. If you are using a LAN cable, simply unplug it.
    9. Create new connection in Network and Sharing Center and select modem and dial-up.
    10. Enter the following fields with ONLY THIS (no area codes or any other information). If a pop-up asks for area code or country code rules, ignore it.
    – Number to dial: *99***1#
    – Password: CINGULAR1
    11. Click connect.


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