[HD7 General] Tanker Don:
I'm beside myself trying to get my HD7 to tether.

First, I've read every post remotely related to this topic on this forum and others. Thanks to all the people in this community who have shared information on how to crack these phones, provide ROMs, troubleshooting and expertise.

I would have never gotten this far without all of your help.

I hope someone can solve this issue, because it sounds like many others have, or will have the dreaded "Error 692" problem when attempting to tether.

Some background: I'm attempting to tether a Windows 7 32-bit laptop to a T-Mobile HD7 in the US. In order to jailbreak the phone, I got an sim unlock code, then I installed one of the 7004 build ROMs from the HD7 developer's forum on this board, then unlocked with Chevron. I'm still under OS7004, with a boot loader version of 1.54.2250 and firmware 2250.09.15402.531.

I then followed the following procedure, posted on this forum and others:

//

1. Download XAP file

2. Download HTC Sync for Android from HTC for USB Modem driver

3. Deploy XAP file to your phone

4. Turn of your Data conection in your phone.

5. Run DFRouter and click on “HTC Modem”

6. Open your device manager, it will show 2 unknown device, choise device have ID is : USBVID_0BB4&PID_0EFF&REV_0000&MI_01, update your driver with HtcUsbMdm and you got HTC USB Modem.

7. Make a dial up call from your computer and set it work like other WP7 tethering from samsung or LG.

8. Click “Zune Mode” to come back with Zune Sync.

For dial up make a call *99# with mi_01 id modem. Mi_00 is diag port, maybe have some qualcomm unlock here. Don’t forget add +CGDCONT=1,”IP”,”your apn” in your advance property of modem.

//

The only variation is that I could not, no matter how hard I tried, manually install or change the two HTC modem drivers. Despite downloading them from several sources, and even trying both 32bit and 64bit drivers, I could not get windows to accept them. Even if I "uninstalled and deleted the drivers" then attempted to reinstalled the drivers for the two "Unknown Devices" I could not. Windows would not recognize the HTC drivers as being appropriate for the device. The only way I could get the HTC modem to install was using the HTC Sync software that automatically installs those drivers. By doing so, it seemed that in the Device Manager the HTC mode is installed... but there is only one device listed, the "HTC USB Modem."

In troubleshooting this, here are the things I have tried:

- Restarting the phone and machine numerous times.

- Performing all functions with anti-virus and firewall disabled.

- Yes, I have made sure the WiFi and data connection are off before connecting the USB and attempting dial up.

- I have tried the trick of selecting "USB" Sync then "HTC Modem" right before attempting dial up.

- I have tried every T-Mobile APN known to man in the initialization string.

- I have turned off "IPV6" and compression on modem settings.

- I have tried all COM ports 1-8.

- I have entered in the same APNs that are in the modem init string to the HD7's settings under cellular > Network Selection.

There are probably other things I have tried as well... if it was listed in any post on this board, I've probably tried it.

When I attempt to query the HTC Modem, the response I get is always something to the effect of "can't detect modem... make sure it is turned on." Here is a cut and paste of the log... which is always the same no matter what I seem to try.

05-14-2011 08:35:33.152 - File: C:\Windows\system32\tapisrv.dll, Version 6.1.7600

05-14-2011 08:35:33.153 - File: C:\Windows\system32\unimdm.tsp, Version 6.1.7600

05-14-2011 08:35:33.154 - File: C:\Windows\system32\unimdmat.dll, Version 6.1.7600

05-14-2011 08:35:33.154 - File: C:\Windows\system32\uniplat.dll, Version 6.1.7600

05-14-2011 08:35:33.156 - File: C:\Windows\system32\drivers\modem.sys, Version 6.1.7600

05-14-2011 08:35:33.156 - File: C:\Windows\system32\modemui.dll, Version 6.1.7600

05-14-2011 08:35:33.157 - File: C:\Windows\system32\mdminst.dll, Version 6.1.7600

05-14-2011 08:35:33.157 - Modem type: HTC USB Modem

05-14-2011 08:35:33.158 - Modem inf path: oem19.inf

05-14-2011 08:35:33.158 - Modem inf section: Modem0

05-14-2011 08:35:33.159 - Matching hardware ID: usb\vid_0bb4&pid_0eff

05-14-2011 08:35:33.163 - Opening Modem

05-14-2011 08:35:33.163 - 115200,8,N,1, ctsfl=0, rtsctl=1

05-14-2011 08:35:33.168 - Initializing modem.

05-14-2011 08:35:33.173 - DSR is low while initializing the modem. Verify modem is turned on.

05-14-2011 08:35:33.173 - CTS is low while initializing modem.

05-14-2011 08:35:33.185 - Send: AT<cr>

05-14-2011 08:35:35.185 - Timed out waiting for response from modem

05-14-2011 08:35:35.185 - The modem failed to respond to the initialization command, Retrying one more time

05-14-2011 08:35:35.185 - 115200,8,N,1, ctsfl=0, rtsctl=1

05-14-2011 08:35:35.186 - DSR is low while initializing the modem. Verify modem is turned on.

05-14-2011 08:35:35.186 - CTS is low while initializing modem.

05-14-2011 08:35:35.197 - Send: AT<cr>

05-14-2011 08:35:37.197 - Timed out waiting for response from modem

05-14-2011 08:35:37.197 - The modem failed to respond to the initialization command, Retrying one more time

05-14-2011 08:35:37.199 - 115200,8,N,1, ctsfl=0, rtsctl=1

05-14-2011 08:35:37.201 - DSR is low while initializing the modem. Verify modem is turned on.

05-14-2011 08:35:37.202 - CTS is low while initializing modem.

05-14-2011 08:35:37.212 - Send: AT<cr>

05-14-2011 08:35:39.217 - Timed out waiting for response from modem

05-14-2011 08:35:39.220 - Session Statistics:

05-14-2011 08:35:39.220 - Reads : 0 bytes

05-14-2011 08:35:39.220 - Writes: 9 bytes

I'm sure I must be missing something simple or stupid. I sounds like windows doesn't have the drivers it needs or can't connect to the device.

Any help would be hugely appreciated... I desperately need to get this working so that I can have mobile internet access for my work.

Thanks!