Seems like a pretty easy issue to fix actually. Go to the DELL Wiki over at xda, Dell Streak - XDA-Developers
and scroll down until you find the chart with the update.pkg file for your 351 baseband version. Download it and put it on the root of your SD card. In recovery, just choose update and let it go through it's paces. If you don't have a hardware related issue that should take care of it.