[Networking] yeah123yeah:
It's not a phone issue but I'm having an issue with an at&t usb modem and hopefully someone here can help me becuase i've gotten absolutely nowhere with at&t support...

Here's a little background info before I get to the real issue: I was recently migrated to at&t in the merger from alltel (a little less than a month ago, the date of my actual migration was 4/14). I was sent a sierra wireless data card (the "shockwave"). I had an alltel wireless card for years and always had unlimited data, so before the migration i was assured by at&t that i would be grandfathered in to an unlimited plan. After recieving overage warnings 3 days after my at&t device was activated, I found out I was migrated into a 250MB plan and was told I needed to file a claim to get my unlimited plan back. In the meantime, the device worked great and I used it at least once a day up until I recieved an email from at&t stating that my claim had been resolved and I was granted the unlimited data plan.

The device has not been able to connect to the network since. I've spent hours (literally about 12 hours) on the phone with their tech support over the past 8 days and nobody can figure out why I cant connect ever since my package changed. Honestly they havent had me do much to troubleshoot other than reinstalling device drivers (several times) and having me try other laptops. Eventually they sent me a replacement device stating that the newer devices may not be compatible with their old billing codes (as they no longer offer the unlimited plan under normal circumstances), so they sent me an older model, the sierra wireless "lightning" (fyi, I have both devices still). This device is doing the exact same thing: It connects (or seems to, anyway) for a split second, and then disconnects with error code 635, which the support people tell me means i have no coverage (although, according to their own website is a "random error code") and aside from telling me to uninstall and reinstall the device drivers, they will not troubleshoot the issue any further. The connection manager always shows at least 3 bars of 3g at my home (where most of the troubleshooting has taken place). I have also traveled with the device in the last few days and have tried it in 3 different major cities getting the same error every time, so I am confident it is not a coverage issue. At one point, an at&t representative told me I probably need a different initialization string due to my unusual plan, he put me on hold to research the issue and after I waited several minutes our call was lost and i was not able to get to him when i called back. I mentioned what he was researching to the agents i spoke with after this (i'm not sure if he was on to something or not, but i figured it was worth mentioning) but they disregarded it and went back to having me uninstall/reinstall drivers again and again.... and again.... to no avail. Unfortunately, I'm not at all knowledgeable about this stuff so I have absolutely no clue how to even begin to troubleshoot the issue on my own. Either way, I have gotten nowhere and i REALLY need to get this working. BTW, I have tried the device on 4 different laptops, with the same result every time (three are windows 7 laptops and one is vista). Hopefully somebody here will have some suggestions for me?