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So, I have unlocked my Samsung Nexus S that runs on Android 2.3.1 and i have rooted it. The problem now is that I cant open wifi anymore, it keeps telling me "error" whenever I click on wifi ..

Why is this happening? How to fix it?

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  • All it says is "Error"? Jan 4, 2011 at 3:01
  • Yes, when I click on the wifi tab it says error beneath it.... A friend told me to install a new "Kernel" but I dont want to overwhelm my android with custom made Kernels
    – kay
    Jan 4, 2011 at 7:31
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    Um, I don't think a kernel will "overwhelm" it. You'd most likely need to replace the modem as well. I recommend an entire custom ROM. Feb 13, 2011 at 18:51

2 Answers 2

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I fixed this by restoring only the android "boot" module from the original rom backup:

I used the clockworkmod recovery which can also be installed from the rooted phone using the "rom manager" app. But instead of making a whole recovery, i simply went into advanced recovery options, selected the above mentioned backup folder, and selected to restore only the "boot" module:

  • start clickworkmod recovery,
  • select "backup and recovery"
  • select "advanced recovery"
  • select the image of the original backup (see below)
  • select restore boot

This post describes how to restore your nexus s to original stock android and provides a backup of the original rom: http://forum.xda-developers.com/showthread.php?t=884093

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The same happens for me. When I use the 'fastboot boot *.img' command from my pc, the Nexus S boots into some (e.g. Netarchy) kernel, and everything except WiFi works.

I assume the problems lies with some kernel-modules (which can actually be on the device memory, outside of the kernel) which do not match the new kernel. Since some of the modules (e.g. for the gsm/gprs radio) are closed source, they are not updated to match newer kernels.

So you could try older kernel versions, or wait for updates from Samsung

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