OK... I have flashed 353 recovery via fastboot and installed 353 (latest AT&T stock ROM). Complete factory reset. As bone stock as can be. All I have done is log in my GMail account and download SpeedTest.net and Flash.
Every test, SpeedTest.net, Speakeasy, etc, my upload on 3G will not go over 300kbps. I called Dell and twenty-five minutes later, they are sending out a replacement unit. I explained that I have gone to AT&T first, obtained a new SIM card, and even tried my new SIM in another phone and got 1-1.25Mbps up. Another SIM in my phone would experience the same degradation.
Now to get stock off ASAP until the replacement arrives!
that's strange that ur phone caps dl tp 0.3mbps, I still think that its either the kernel or something in the code. coz I sometimes get 1.5-2.5mbps and sometimes only get 0.5 and some days it wont connect at all.. yesterday I had hsdpa all day running at 2.5mbps... I dunno what's up its really strange