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mmmkay; i'm on OS 3.0 NOT jailbroken and i'm getting that same 0xE800003D error. Since I'm not on a jailbreak I don't have the Cydia At&t logo so i'm stumped.

I don't want to upgrade to 3.1 b/c i don't want to lose tethering. Li'l help?
 
Works for me and I can confirm that the benm tethering hack still works afterwards. So I now have tethering and MMS on 3.01 using itunes 8.

So will att charge you extra for the tethering, or will come out of the 5 gb limit att has on us??
 
For everyone wondering about tethering with the http://help.benm.at/help.php hack: if you are running OS 3.0.1 go to https://forums.macrumors.com/threads/792908/ and follow the instructions.

If you are running OS 3.0.1 you can do the carrier update to AT&T 5.5, then MMS and tethering will both work! If you update to OS 3.1 tethering will not work. If you go to http://help.benm.at/help.php it has a video on how to downgrade.

Also be careful the ipcc file will try to save as a zip file. Don't let it.
 
Those who think aT&T tethering is working under 5.5 are probably wrong.

Try to use it.

If it does work for you...please mention if you hacked your phone beyond just installing a carrier file.
 
Those who think aT&T tethering is working under 5.5 are probably wrong.

Try to use it.

If it does work for you...please mention if you hacked your phone beyond just installing a carrier file.

I have the benm tethering hack only, I stayed with 3.0.1, manually installed the 5.5 carrier file, and I definitely have mms and tethering working. As do many others from what I'm reading. Was reading last night somebody has a supposedly official AT&T 6.0 carrier file that appears to allow for both mms and tethering, but I don't fully understand where he got it or what exactly it is and does, and whether it allows for tethering on 3.1.
 
Sorry if this has been asked already, but I've done this workaround (32 GB 3GS on 3.0) and now have ATT 5.1. Sent MMS attempts freeze with the satus bar at around 90% before failing, and attempts to recieve any haven't shown up.

My problem still or AT&T's?

I'm located in Central NJ if that matters for anything...

BTW, the only way I was able to get through the command promt step was to take out the " after itunes.exe...kept getting invalid command responses. What's up with that?

Update: Nevermind, I changed the carrier to 5.5 using the OP's first link and just changed the file name to .ipcc and it seems to be working :)

Thanks!
 
Not here...

I'm running 3.0.1, AT&T 5.5. This hack broke my tethering. I can redo the BenM hack to get the tethering back, but that breaks my MMS. :mad:
 
I looked up your problem in google. Seems like its a problem with your computer
http://forums.ilounge.com/showthread.php?t=215463

I could try reinstalling iTunes, and in that doesn't work. Reinstall your drivers for your usb 2.0.

So I have reinstalled iTunes and am still getting the same error! I tried updating my USB drivers and it tries to get the update from the CDROM and not the internet, there is no option for me to get update online? My current USB driver is Intel(R) 82801FB/FBM USB2 Enhanced Host Controller - 265C

Is this the correct driver?
 
OP - why is the first link a ipcc that is 33k in size and the alt link is 59k in size?
 
Added the IPCC to get MMS, Tethering, and Visual Voice Mail ALL working. Tested on my 3.0.1 32G 3GS and all are working perfectly. (Must be on 3.0 or 3.0.1)
 
I'm on 3.0.1 and had the Benm hack prior to adding MMS.

Everything is working for me and I used the 5.5 file.

Thanks.
 
I am not quite understanding the original post. You have 2 downloads for the 5.5 carrier file then you stated if you want MMS/Tethering/VVM, to download the 6.0? Will the first 2 downloads break tethering (which I'm assuming they're the 5.5 carrier file)? Sorry, I would just like some clarification so I don't lose my tethering but I would like the new carrier update.
 
Ya i tried everything the stealth and 5.5. But it seem that my Carrier info is not updating. Can i change manually. Will i be able to keep tethering...
 
Nice. Easy as 123 and works perfect. I have MMS, tethering and VVM working 100% on 3.0.1 on my non-jail-broken 3GS. I had previously done the benm tethering hack so I wasn't sure which carrier file to use. I chose the 6.0 version and all is good.
 
I'm still not getting it.

I'm on a iPhone 3G 3.0.1 OS NOT jailbroken so i don't have the Cydia ATT logo but i'm still getting the error message. Is something supposed to happen when I run the command prompt? mine just skips to the next line after I enter the command.
 
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