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I have Galaxy Tab 7.7 tablet running Android 3.2. Recently, I'm having connection problems to my home Wifi router. The device keeps scanning for Wifi access points for long periods. My home Wifi router is shown with a "Not in range" message next to it in the Wifi settings screen. However, sometimes after long period of time, the device randomly connects to the Wifi router.

It is worth mentioning that during the scanning mode the device does not detect any Wifi access point even thought where I live there are many Wifi access points (over 8 access points).

What is the solution to my problem?

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I had the very same case a while ago with my HTC Wildfire, after having flashed CM7 over the stock ROM. It solved when I also updated the radio firmware, and now still runs fine with CM9.1. If you made similar changes, this might be worth a try; otherwise I don't know anything apart from a Dalvik Wipe or factory reset. – Izzy Feb 20 at 19:59
@Izzy Thanks God. No need for factory hard reset :) – turkistany Feb 25 at 17:33

1 Answer

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The solution turns out very trivial and surprising. It shows and proves practically that the behavior of complex software systems is unpredictable.

The solution: Go to Mobile network settings and disable Use packet data. Next, enable Wifi and then go back and enable Use packet data.

Magically, all my problems disappeared after I applied described steps.

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Woah! who would have thought of that... Glad it solved that easy, and (even better) did not need a factory reset! – Izzy Feb 25 at 19:39
I guess there is some conflict between the code that handles Wifi functions and the code handling 3G networking functions. – turkistany Feb 25 at 19:52

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