Samsung Captivate :: Unable To Scan For Networks / Turns Wifi
Aug 26, 2010
I got the samsung captivate for AT&T a couple of weeks ago and have run into a few problems with it:
1) Wifi worked great for a while, but now it says unable to scan for networks and turns the wifi off...this wouldn't be too bad if I had a big data plan but I do not.
2) Battery Life...fml
3) I cannot find ANYWHERE any supporting software to sync media files with my PC
4) The drivers will not install on my computer
5) Way too many apps are using data without me even opening them (navigation, yahoo mail etc...) I have AdvAppKiller but that gets old
It is wonderful having such a wonderful, fast device with 16 gb of memory, but these shortcomings are making me realize why I enjoyed a flip phone for so long.
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Aug 4, 2010
It happened to me last night on the Captivate. I tried battery pulls, deleting the WiFi nets, etc., but it still kept turning WiFi off within a minute of turning it on. I did a factory reset (I'm getting better at this process. Can restore my device back to its former glory within an hour).
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Sep 25, 2010
Just a quick question for everyone that has done the OTA update. Is your Wi-Fi- working. Mine will not scan for networks and just turns the wi-fi- off.
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Sep 8, 2010
I'm having the dreaded "Unable to Scan for Networks" in the WIFI. Can I fix without doing a reset? I'm on vodafone UK. All the info I have been reading points to me having to do a master reset. Or deleting a file if my phone is rooted. Can I root my phone to do this? or is this not possibly on a voda contact mobile. After I accidentally removed my WiFi from my phone. Then added it again. Getting my WiFi working. Info about Rooted phones (is it possible with mine?). A good backup software for PC, is kies any good what does it backup?
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Aug 16, 2010
phones worked good other then gps issue. recently after iv had the phone for 30 days it just stopped scanning for wifi access and wont turn on wifi at all.
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Jun 14, 2010
When I turn WiFi on, it always say "Unable to Scan for Networks". I tried to turn off, pulled the battery, turn back on but does not make any different.
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Mar 18, 2013
In Jan. I switched from Sprint to a different carrier and got a new phone with the new carrier which left me with my HTC Evo 4G and I've been trying to use the Wifi so I can use it at work or at home when I don't feel like using my laptop and whenever I try to turn my WiFi on it just turns on then off and tells me "Unable to scan for networks".
I've noticed that it says that my IP address is unknown and Bluetooth isn't working either. I did a factory reset on my phone and all that did was delete my Doctor Who background.
Sidenote: my husband was on my family plan and he had the same phone with the same service and his WiFi is working fine.
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Apr 20, 2012
After rooting with DooMLoRD v4 tool my china A6380 Android 2.3, which has mt6516 416MHz and Android 2.2.1 instead, wifi stopped working.
Tried unroot and factory reset but no luck, still "Unable to scan for networks".
logcat follows:
D/AudioStreamHandler( 51): Asm_Afe_Start(ASM_AFE_MODE_NORMAL)
I/WifiProxyDialog( 213): >>> onReceive()
I/WifiProxyDialog( 213): >>> handleWifiStateChange()
D/AudioYusuHardware( 51): setMasterVolume=1.000000, avaliable device=2
D/AudioYusuHardware( 51): Audio_Match_Output_device mRoutes = 2 mMode = 0 Mode = 0 CheckForceUse 1 mOuputForceuse[Mode] = 0
[Code] .......
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Feb 17, 2010
I'm having a strange issue with WiFi on my Samsung Moment (post CL14 update). I don't remember having this issue prior to the update but I can't say for sure that it was something that started immediately after receiving the update. Whenever I turn on WiFi, it says "Scanning" for about 5 seconds, then an "Unable to Scan for Networks" window pops up. Sometimes it scans just once, other times it scans 2 or 3 times, but eventually it automatically turns off the wireless. At first, I thought the problem was caused by a WiFi toggle widget, so I tried factory resetting the phone to remove all of my downloaded apps, but I had no luck.
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Jun 5, 2010
I'm trying to scan for wireless networks and found this helpful source on the net. Unfortunately it's not working and I have no idea why. My problem is that I can't wait 10 minutes for the result - I need them within a few seconds and thought about setting the boolean variable waiting on false as soon as I get a result, well it runs forever. Looks like nothing is received.
// -- Sample WiFi implementation - http://groups.google.com/group/android-developers/browse_thread/thread/f722d5f90cfae69 IntentFilter i = new IntentFilter();
i.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
registerReceiver(new BroadcastReceiver(){
@Override public void onReceive(Context c, Intent i){
// Code to execute when SCAN_RESULTS_AVAILABLE_ACTION event occurs
mWifiManager = (WifiManager) c.getSystemService(Context.WIFI_SERVICE);
wireless = mWifiManager.getScanResults(); // Returns a <list> of scanResults
waiting = false;
} } ,i);
// -- End Wifi Sample mWifiManager.startScan();
while (waiting) { try { Thread.sleep(200);
} catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace();
} Log.d("PROJECT1","Wifi WAITING");
}
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Aug 9, 2010
I am programming for google android and I wonder if the scans for wireless 802.11 networks are done passively or actively? I mean: Does the device actually emit a beacon request signal on
WifiManager.startScan()
Or does it just listen for beacons sent periodically by the access points?
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Aug 24, 2010
I turn it on, it says its on for like 10 seconds and at the bottom of the screen it says "unable to save networks" and then it says "unable to scan networks" and then it turns right back off
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Sep 4, 2010
My wifi will turn on, but will scan for or connect to networks. Anyone had this issue and know how to resolve it?
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Jul 22, 2010
I am new to smartphones and thought that this might be good for others who are new and don't have the unlimited data plan grandfathered in to know.
This was posted in reply to another question I had had about Pandora so the credit goes to poster MeVirtually.
By default the wi-fi setting is set to go to sleep (and use cellular data instead) when the screen is off, which will most likely happen while you are streaming music as well as other things. To change it so the wi-fi never turns off, to into the phone's menu -> wireless and network -> wi-fi settings -> tap the menu button and select advanced which has an option for wi-fi sleep policy that had been defaulted to sleep "when screen turns off". There you have the option to change it to "never" or "never when plugged in".
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Nov 7, 2010
The wireless network in my area follows the EALP/PEAP protocol which isn't supported on Android phones. So, I tried setting up local WiFi hotspots from my laptop to enable WiFi. But my phone doesn't detect that wireless network at all. My friend's Nokia E51 detects the hotspot, but not my HTC Desire. I tried detecting hotspots created from other laptops but the result remains the same. The E51 detects it but the Desire does not. Do I have to change some settings that I am unaware of?
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Aug 11, 2010
I am trying to connect to my home wifi, its WEP security on a linksys router, but every time i try to connect it says unable to connect, also idk if there is supposed to be a wifi icon on the top bar but it does not show one at all, appreciate any feedback
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Oct 2, 2010
My SGS (well its actually my wife's but I use it also) will not connect to WiFi networks, other than the one we have at home. If we are out, the phone will be able to see lots of WiFi networks, but it cannot connect to any of them as it says the signal is poor. Other people can be sat right next to other with other phones and have no problem connecting and they have strong signals. At home it will connect, but even then there is only one bar of signal, even though the router is in the same room. It appears that the phone just cannot get a strong enough signal to connect.
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Oct 28, 2010
Anyone having this problem?
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Oct 2, 2010
My captivate turns off after a period of non use during the day. Is there a fix?
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Jul 28, 2010
Anyone else have a problem where their phone turns off and on and off abd on... My does it about once a day. I have to pop the battery to stop the cycle.
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Aug 8, 2010
Is it possible to have the screen only come during turns similar to TeleNav? This is a big plus for TeleNav if it doesn't. The battery saved is tremendous.
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Jul 18, 2010
Anything you guys can think that could help? I've searched around, and found that holding down VOLUME DOWN and Power lets you hard reset the phone, but this doesn't work for me. I hold them down, and the phone just boots up like normal and then shuts off.I rooted it, and it was working fine. Rebooted a few times and then it quit working.
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Sep 14, 2010
When I select the power button to bring the phone out of sleep the phone screen will turn off within a second or two. Is there a way to keep the screen on longer? If I press power and look away for a second the screen goes black again. Its liek I have to hit power and jump right on it to enter my swipe code.
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Oct 27, 2010
I rooted my Captivate tonight and I know how the superuser icon with android skull and crossbones. However neither Super Manager or ASTRO will allow me to uninstall the crap ware on my phone. Is there something I'm missing? I followed all the steps at XDA. So far I've tried to remove YPMobile, ATT Navigator, and ATT Maps. Any suggestions? I tried searching this on google and this forum but didn't come up with anything.
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Oct 25, 2010
I rooted my captivate thinking that i could install apps that are blocked on my phone, like Sirius XM, WiFI tethering.....even after rooting the programs are still being blocked and i cant install them. am i missing something? im new to android and had an iphone that i jail broke. im confused on what rooting actually.
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Nov 13, 2009
So I just got the HTC Hero for sprint and I love the phone. However I am not receiving any texts from anyone that is not on the sprint network.
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Aug 19, 2010
I wrote an android application to request a scan for available WiFi signals around, using the WifiManager, then dump the results to a file. The program works fine, but this weird bug occurs. Initially I was requesting a scan every 30 seconds, and everything worked fine. I then tried to request a scan every two seconds, I get this strange bug. Everything will work fine for a few minutes, then the time between two scan requests jumps from 2 seconds to 50 seconds for no reason.
Then, for four more scans, it will scan at 2-second intervals, then skip to a 50-second interval, and it continues to do this consistently. With larger time intervals this bug does not appear. Has anyone experienced this bug before? Is there a way to prevent it? Or does Android automatically cancel scan requests if they are too frequent?
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Sep 29, 2010
I got myself a Samsung Galaxy S. And decided to sell my Milestone to a guy. So when he is testing out the phone the WiFi doesn't scan his office WiFi. It scan every WiFi around us except the office WiFi. I use my Milestone's WiFi all the time. And all the time it scan and detect all the WiFi. Infact 30 mins before the sale I was using the Milestone's WiFi at school to find a map to his place.
Weird thing is when I use my Galaxy S to scan WiFi, it scanned all the WiFi and his office's WiFi too. So does anyone know why my Milestone is able to scan everyone else WiFi except his office's WiFi? It couldn't be hidden because my Galaxy S was about to scan his WiFi. This is extremely bad luck, because I know my Milestone is in perfect working condition and now he would think I'm scamming him.
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Mar 17, 2009
I am currently doing my Bachelor Project concerning Android Programming.
Therefore i need a possibility to SCAN/DISCOVER Hot-Spots or WLAN's where i can connect to.
In many topics i have read, that the EMULATOR does NOT support WiFi scan with WiFiManager. I also tried using ConnectivityManager or BroadcastReceiver. But it doesn't ever work.
So my question ist the following - is it CORRECT that the emulator does not support any kind of WLAN Scan/Discovery? I need as many comments on this as possible - because only if its REALLY true, that the emulator does not provide WIFI functioanlity, then i can ask for buying a Dev Phone.
And if so, WHY there is no WiFi support within the emulator...?
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Jan 15, 2013
I've installed custom android 2.2 to my phone Tmobile pusle mini (huawei u8110) and now i have no mobile network .It says unable to search for networks. I cannot post in that forum because of the restrictions to new users.
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