same, my wifi will "connect" but the wifi signal bars will be grey instead of blue and all my data appications will report no connection.

 

I can connect when my 3g/4g is turned on, but the range is terrible. Then the phone losses the wifi connection all the time causing the phone to switch between wifi and 4g in return killing my battery. So that sucks.

How do you turn 3g/4g off?

 

This is going to sound counter-intuitive - and may not apply here - but here's a suggestion maybe worth checking out.

I've found that a number of newer phones, with MORE sensitive wifi radios, can suffer these symptoms sometimes and it's a matter of radio interference. (And the thing about turning off the mobile radios is making me suspicious, hence this post.)

Please try Wifi Analyzer, free in the Market, swipe left/right to get different screens.

Sometimes these problems are caused by a nearby wifi network on the same channel as your network - the more sensitive radio gets confused which to select for the lock, chooses the weaker one and then decides it's not in range.

If you find a conflicting wifi network on your channel, you can change that in your router's configuration settings. If it's happening at work, almost a certainty that your IT crowd will want to know and not channel share.

Anyway, no guarantees on this one but it is a quick and easy check and is definitely worth a shot.

 

I tried both of your methods and wasnt able to replicate it. I havent had any wifi issues at home or at work.

 

I have had no kind of wifi issues since day one.

 

I've got the same problem. Type in the WPA2 password and it takes forever to obtain IP address and then the signal strength appears to fall off.

However, I was able to connect to my neighbors unsecured access point with no WPA. Does the encryption have something to do with it?

 

I'll try when I get back home again. Work has an unprotected network, but my home has a WPA2 secured network. I havnet noticed any problems at home, but I'll try the methods you listed to re-create.

 

I haven't had any problems at home on WPA2, I'm using the 5ghz band though.

 

I have no problems with WPA2, either. I usually turn of data when I'm on Wifi anyway, but if I leave it on my Wifi still connects and stays connected with no problem.

 

I've been in your shoes, exactly. Everything connecting fine at home until the newer Android phone came along (with two older ones connecting just fine).

If it is a channel conflict, as I have had, as others have had - getting rid of it not only solves your connectivity issue, but you'll find your apparent network speed on all of your other devices _increasing_ as well.

Please note my advice - it's not to just switch channels, it's to use that app to check first. If there is no channel conflict then leave your router alone.

As for your IT department - ok, everyone's mileage varies - the good ones never like sharing channels.

 

How do I do a hard reset?

Running OS 2.3.4

GT-I9100 unlocked, not rooted, checking for OTA update - nothing.

Suddenly my WiFi will not connect. Sitting right next to router.

Tried disabling 3G, didn't work.

Tried the battery trick didn't work.

I have had the phone for 7 months, no problem. No no WiFi.

Help appreciated.

Shofar

 

Weird, weird, weird.

Checked the phone again and is now connected to WiFi.

Don't know what happened, don't know what fixed it. But happy again.