I have a Belkin N router and tried everything you listed above except number 2. My sleep policy was already set to "never" and my router's up to date (firmware version 4.00.05). I have a feeling it won't matter what router I use-I'll still continue to have issues. I also have connectivity issues with the 4g network as well. The only thing I'm wondering at this point is whether or not I can revert back to 2.3.4 since I don't think a resolution is in the near future. Any thoughts?