Connected to Wi-Fi, but no internet - Samsung Galaxy S7 Edge Questions and Answers

So today I came home, connected my S7E to home Wi-Fi, and after some time, the internet was not available. The wifi icon is shown with exclamation mark and none of the apps, neither the browser, has connection (chrome says DNS probe finished, no internet). But it was working for about an hour, then it suddenly stopped.
I used another device to make sure the internet is working. Then I rebooted my router and phone, but no change. I made Android forget my Wi-Fi and connected again, also tried again with specifying the IP, mask, gateway and DNS. Still no success. (When I connect to the Wi-Fi without specifying IP and other stuff, the mobile obtains it automatically) Tried on 5 different routers (TP-LINK, Zyxel, Compex), the same results. All of them are 2.4Ghz, will test at some Ubiquiti's 5GHz APs tomorrow.
The ping in IP Tools app timeouts on every IP (router, gateway, DNS servers), only mobile's IP can be pinged. When I try to ping from another device to my phone, it works. Just the reply time varies from 4ms to 1000ms.
Tried hard reseting my phone (holding power + volume down, not doing factory reset) and hard reseting (cut the power) all my network devices (routers, gateway, switches). All of them have the latest firmware.
When using mobile data, internet is fine.
Also, the internet is propably sometimes available for some apps. I let the phone for few hours to see if it will fix itself, and there were new notifications from Instagram app (I'm 100% sure that my post was liked after the phone lost internet, so the notification must have been pushed to the phone through the "broken" Wi-Fi. But when I open instagram, it says it's offline. Other apps (Messenger, Gmail, Facebook, etc.) didn't received any notifications.
I have Galaxy S7 EDGE, Android 7.0. I used mobile data to check for software updates, phone is up to date.

So the issue stil persist, and I noticed some more things:
I also tried booting into recovery mode and wiping cache partition but it made no change.
If I disable encryption on my WiFi, the connection starts working, but only for few hours. Then It's not working again. Also, this helps only sometimes.
I used IP Tools app to perform a ping requests, set it to 10sec timeout and let it for a while to do ping requests to my gateway. Most of the requests just timeouts, then for a few seconds there are some successfull ones with time of about 5ms, and then it goes back to timeout.
Pinging from my computer to phone is always successfull, reply time varies from 5ms to 70ms.
So the randomly goes on and off on many routers, and none of my actions made change, so it's definitelly a software glitch, maybe the latest update caused this.

Me to...
Did you ever fix this? My phone has started to do this in the last week or two.

Have you installed a local VPN-based adblocker like AdGuard? I have. And lately I've seen the same symptom on WiFi -- connected, but can't communicate. Stopping and restarting AdGuard fixes the problem.

No, no new apps or anything vpn related.
Seem to have solved it now after a hard reset (hold volume down + power button) suggested elsewhere. A day and a half without problems, fingers crossed.

Related

How I solved Wifi problem

Lately I have been reading many post related to Wifi problems in the HD. I had the same. Even I was very near my router I couldn't connect to the net and the signal was very weak.
So I entered my router configuration and I found a solution.
Before, for security options I had: WPA-PSK [TKIP] then I changed to WPA2-PSK [AES] (of course you also have to change your HD connection configuratoin), and now it works great¡¡¡¡
Now I have all the bars for the signal and I can connect very easily.
Hope it works for other people
I have a similar WiFi connectivity problem, but after reading of the poor service provided by most vendors and HTC itself, I will try to gather some more experience with the problem before I contact HTC or my vendor, and hopefully find a solution. Bellow is my experience so far:
I own an HTC Touch HD since January and have a similar problem, only it surfaced last week. Before I had only used the WiFi connectivity briefly. The problems started after I installed an AP on my house expressively for the new PDA. The node is fully open and set to B/G/N protocols.
After a couple days of medium (couple hours per day) use the WiFi connection suddenly quit, the device would try to connect (the top bar showing the WiFi connection animation continuously) and after a few moments gave up with a dialog box stating the current network settings were wrong (even thou they worked fine a few hours earlier).
I tried several hot and cold resets, but only solved the problem after flashing a new ROM; even then the same symptoms reappeared after a couple of days of regular use. Again no re-setting would cure the problem, and now not even flashing the ROM again would work. Nonetheless, some hours latter the WiFi would connect perfectly with the same nodes it refused to before, and in very short time.
I have witnessed this cycle twice and have yet not been able to find a trigger for it, but will keep my eyes open for any tell tale signs, and post any findings here.
I could add to the above mentioned problems.
i got a new hd just few days back.
The wifi worked great. But now it doesnt.
I have disabled wifi, so can start it whenever i require.
I click on wifi button to enable it.
Then open opera, try any website.
it will open fine.
For instance say my email at gmail.com
Now after that if i try to open anysites or even continue with my mail, it shows error saying connection not available.
One of the workaround is to go back to toggele wifi off and switched it on.
Not sure if anyone faces a similar issue.
I's been about a week since my last post and I have already witnessed a couple of cycles of WiFi connecting perfectly and then not connecting at all.
No matter the settings I try after it decides not to connect, it won't. Even to nodes it had connected perfectly and fast jus minutes before.
I thought re-flashing might help but so far has proven ineffective. Once I thought some part of the non-volitile memory was causing the problem since after I cleared the memory I could connect for a while.
Any thoughts anyone?
Same problems here.
For the last hour I have been reading 10ths of threads here concerning WiFi problems.
My HD's WiFi worked fine on my home and outside for about 2 months. Now it doesn't. It reports connection, but no program can use the internet. At best, it seems to be able to exchange some Kbytes the for just a few seconds after a connection is established. Then nothing. Connected but unusable.
Tried everything Internet/My Work/My ISP, WAP enabled/disabled, soft/hard reset, everything.
When connected through ActiveSync everything works fine, all programs see internet.
Has anybody taken their HD to the service? Has any HTC service worldwide identified the problem as hardware and solved it by replacing something?
miskasp said:
Lately I have been reading many post related to Wifi problems in the HD. I had the same. Even I was very near my router I couldn't connect to the net and the signal was very weak.
So I entered my router configuration and I found a solution.
Before, for security options I had: WPA-PSK [TKIP] then I changed to WPA2-PSK [AES] (of course you also have to change your HD connection configuratoin), and now it works great¡¡¡¡
Now I have all the bars for the signal and I can connect very easily.
Hope it works for other people
Click to expand...
Click to collapse
I have just encountered a similar problem, but already used wpa/wpa2 with aes. Have tried a hard reset with no joy. My old HTC Touch has no probs connecting via wifi nor does my laptop so I would surmise that the prob is with the HD and not the router.
I am going to try flashing with the latest version of Duttys 6.1 rom and see what gives.
Edit: Tried flashing with new rom with no success. Take a look at this post.
http://forum.xda-developers.com/showpost.php?p=3769339&postcount=7
There are a couple of files to download but i only used the second ie this one.
http://forum.xda-developers.com/showpost.php?p=1363759&postcount=2
Now no problems and can connect via wifi no probs, ip address assigned by dhcp.
Try to go into WiFi settings and move the power slider to max performance. I need to do it here to access my router. This happened also with my HTC TyTN II, with any recent radio firmware. The original WM 6.0 ROM and it's radio work fine in low power mode, but the new ones appear connected but are always at 1 Mbps and there's no traffic until you move the slider to performance mode.
You go into WiFi settings and you configure manual IP and DNS so as router.
DNS is important.
Whit manual configuration, Wifi work always.
(sorry for my english)
Dubh Llas said:
There are a couple of files to download but i only used the second ie this one.
http://forum.xda-developers.com/showpost.php?p=1363759&postcount=2
Now no problems and can connect via wifi no probs, ip address assigned by dhcp.
Click to expand...
Click to collapse
Yeah, but what if I 'm not Orange-UK (let alone UK) ?
vcespon said:
Try to go into WiFi settings and move the power slider to max performance.
Click to expand...
Click to collapse
1st thing I did. Problem still there.
campotino said:
You go into WiFi settings and you configure manual IP and DNS so as router.
DNS is important.
Whit manual configuration, Wifi work always.
Click to expand...
Click to collapse
This is not a solution. I didn 't buy the device to be able to connect to my home WiFi only. What about public hotspots? Or hotels? Or whatever outside your home?

Skyfire will connect to internet, NOTHING else on my phone will??

This is very odd. Suddenly today I'm getting connection errors (GPRS) on every program on my phone EXCEPT for Skyfire. Skyfire can connect and surf the net with no problem, but not one other app on my phone will connect to the net, and I've tried several browsers as well as apps that connect directly (i.e. YouTube, Google Maps, etc).
I'm on AT&T in the US (New Orleans, specifically). I've checked and triple-checked my Media Net connection settings, and nothing has changed that I can see since the last time I was able to use it successfully. I've soft-reset several times, to no avail. I don't know if this is an issue, but while I was using WiFiWMRouter yesterday, it crashed. But I used the "Reset All Settings" function of that which is a crash cleanup of sorts, and still no luck.
What else can I check? It would seem that if it were an AT&T issue, Skyfire wouldn't be able to connect either!
Weird, I have the exact same problem too. I probably wouldn't have known that Skyfire could connect until I saw your post. My problem began (I think) when I uninstalled WMWifiRouter last night. I haven't gotten a connection with any other app since then. I had a hell of a time uninstalling an old version or WMWR I had installed just so I could install the PAID version and now it is apparently causing problems even on uninstall...
To add to this - I've confirmed that devices connected with ICS can connect to the internet through the phone. So it seems to me that the problem is related to some wifi settings (maybe that WMWR sets up) that aren't being "released" when wifi is turned off/disconnected.
If I do a hard reset the connection seems fine. If I then restore a backup from right before the problem started the connection is okay, but only until I try wifi again. From then on it's borked until I restore the backup again... frustrating as hell.
FWIW - I think I pinned down what was going on with my phone. In my wifi settings something (probably WMWR or Phojo) had set a static IP when establishing an ad-hoc network and didn't revert to "obtain an IP address automatically" when I quit/uninstalled the program. I don't know why the IP address of the wifi network adapter affects my cellular data connection, but setting that to "obtain automatically" and turning wifi back off allowed my phone to connect again. So it seems like it was using that IP address regardless.

problem connecting to wireless

I have a network with a hidden SSID. today, I changed my google account password due to google telling me mt accounts was accessed from malaysia (....), so when I got home and turned on my tablet, it prompted me to re-sign in. except I forgot the new password. so I hit home and pulled up the browser, at which point it disconnects from wifi. and I couldnt get it to reconnect or see my network. I reboot, nothing. So I changed the password on my macbook, which works fine on the same wifi.
then i tried to connect on the tablet again, nothing. so i deleted the network from the tablet, then re entered it. nothing. so i changed the configuration on the router so it wasnt hidden. it does now appear in my tablet's list of visible networks, starts to connect, says obtaining ip address, then disconnects and tries again.
any ideas? fyi my android phone is working fine.
It's a well known issue, though with all the 3.1 update threads lately, it's been pushed off the front page.
http://forum.xda-developers.com/showthread.php?t=1138905
http://forum.xda-developers.com/showthread.php?t=1167387
http://forum.xda-developers.com/showthread.php?t=1169458
http://forum.xda-developers.com/showthread.php?t=1158039
thanks for that, one of the people in those topics said using the reset button worked so i tried that and it did. got the newest OTA too, hopefully that has a fix for this. if not, i also downloaded superuser, TB and Android terminal emulator, so i'll have those as options for a fix if it happens again.
of course, i'll need to be rooted to use them, so is there any way to root on 3.1 yet? gingerbreak is broken, I know that cause I just tried.
Yes, there's a thread on it in the dev section. It was rooted about 20 minutes after it was released.
Well it looks like the OTA didn't fix it because it just happened again. So I tried the reset and that worked this time too. Come on Acer, you can do better.
The OTA patch didn't work fully for me either...
Every once in a while when changing WiFi's (work to home, home to a friend's house, etc...) it'll not find the Access point name and disable that connection. I have to turn off Wifi and then turn it back on before anything will connect or search...
I still have the path where to delete the .lease file so I continue to check for that.
The .lease file has not been there the last two times, but connecting is still an issue.
Fortunately, it's a simple thing to turn off WiFi and then Turn it on again and then Ask the connection to do it's thing...
..but yeah. Acer? A little help over here...
I'm stuck.
I soft reset my A500 four times in a row with no luck, so I went ahead and rooted the thing to delete the lease file as mentioned in other posts, and as it turns out I didn't even have a dhcpd_wlan0.lease file in /data/misc/dhcp -- I had no files in that directory at all.
I don't want to deal with a factory reset, but if I do, I'm still sunk because I have no lease file to delete to fix my problem in the future, since that seems to be not my problem.
Running 4.010.13_com_gen2, updated yesterday I think to this version, went to work, everything was great, got home, nothing is great.
Any other ideas besides a factory reset?
Static IP's FIX this issue.
Sent from my A500 using Tapatalk
Returning to work has fixed my issue temporarily anyway -- I am connected once again on my work network. I will shut down before I leave for home and see if that allows me to connect to my home network again.
After which, static IP is the way for me, I s'pose.
Thanks!
setting the static IP worked immediately for me as well. I found a great guide for any users who are unfamiliar with how to do this.
Step 1 is to know your lan network topography: ipconfig /all at a command prompt will give you your computer's IP address, as well as your host/gateway (usually a router). It also helps to know how to log into your router (usually the first octet in your IP range, eg. 192.168.1.1 is a router running DHCP, while your computer might be 192.168.1.4). Examine the IP range that the DHCP is assigning..often it is limited to a certain number of clients already, or you can do so yourself (I have mine set to hand out 10 IP's only via DHCP, while my actual LAN is manually assigned throughout).
Step 2 on the Acer is to open wifi connection properties and select your own network. The Properties Dialog will pop up, and right below Signal Strength, is says 'Network Setup, with a little marker for a dropdown. Select the marker/dropdown and click 'Manual'. Scroll down in the dialog, to IP settings, click the dropdown marker and select 'Static'. Plug in an IP address, subnet and Gateway (router) IP addresses..I left network prefix alone at 24. I also use custom DNS addys (OpenDNS) but you can also simply point them to your Gatewat/Router IP with no problems. Scroll back up and enter your Network Key for the level of encryption you're using on your WLAN, and you should connect right away, since we are no longer relying on the router's DHCP server (and the DHCP/IP assignment bug on the Acer), and once this is done, it will stay that way indefinitely.
Click to expand...
Click to collapse
I had issues pulling an IP connecting mine to my old router, so excluded part of the routers subnet from its dhcp scope and entered a static IP into the A500 for that connection and it has been working fine since.

[Q] Stock N10 with 5.0.1 will not remain connected to Wifi. Works in Safemode.

Stock Nexus 10 - Not rooted.
Following OTA upgrade to 5.0.1 LRX22C
Connection to home wifi cannot be maintained. After entering the password, approx 4 seconds later, the connection drops. Subsequent attempts to re-enter the password result in the error "failed to connect to network".
If I turn off the device wifi off and on again, I can reconnect for all of 4 seconds once again, before the connection drops once more.
I can connect to the wifi hotspot on my phone without issue.
If I start the device in safe mode, it will connect to the network, and remain connected indefinitely.
Unfortunately, this is my daughter's N10, and there are hundreds of apps installed. Methodically uninstalling them, and trying the connection will take me weeks.
Are there any suggestions to more quickly identify the app that is causing the wifi to drop?
I think one by one is the only way to be sure. I have though heard that anti-virus apps have proved particularly troublesome for some people on Lollipop. If there's anything on the tablet like that then I'd look there first.
Hertshammer said:
Stock Nexus 10 - Not rooted.
Following OTA upgrade to 5.0.1 LRX22C
Connection to home wifi cannot be maintained. After entering the password, approx 4 seconds later, the connection drops. Subsequent attempts to re-enter the password result in the error "failed to connect to network".
If I turn off the device wifi off and on again, I can reconnect for all of 4 seconds once again, before the connection drops once more.
I can connect to the wifi hotspot on my phone without issue.
If I start the device in safe mode, it will connect to the network, and remain connected indefinitely.
Unfortunately, this is my daughter's N10, and there are hundreds of apps installed. Methodically uninstalling them, and trying the connection will take me weeks.
Are there any suggestions to more quickly identify the app that is causing the wifi to drop?
Click to expand...
Click to collapse
Have you powered down/up the home router? Or forget and then add the wifi details on your tablet again? It won't take that long to uninstall a bunch of apps at the same time. You could do a binary chop, or do ten at a time. Reinstalling a bunch of apps - all of them, even - won't take too long if you do it via the google play web site.
Solved.
It was McAfee All Access. And specifically, the Web Security, Wifi Security setting.
Turned off wifi security, established the connection, saved the connection, then turned wifi security back on. No problem anymore.
Why it did it is not yet understood. We have several android devices running McAfee security. Only the one with Lolliepop suffered this issue.
Thanks for the tips guys.

Galaxy S5 DNS Issue

In the past week my Galaxy S5 (SM-G900V - Android version 5, Kernal 3.4.0) has lost the ability to connect to the internet a few times when wifi is on (under wifi, it appears that it is connected successfully to the wifi but when using the internet I get an error message about DNS not working).
This first time it happened was at at home and I thought that maybe my router just needed to be reset (which didn't fix the issue) but it happened at work today.
Both at home and at work, the only thing that I could do to fix the issue was restarting the phone (resolved the issue at both locations).
I tried all of the following suggestions with no luck:
Turning wifi off and then back on
Making sure that 'Always allow scanning' and 'Smart network switch' were both turned off on my phone
Choosing the wifi network on the phone and 'forgetting' it and then connecting to it fresh
Setting the DNS servers on the wifi network of the phone to use a static IP address and static Google DNS servers
Trying a different browser on the phone
The only thing that has resolved the issue once it starts is to restart the phone.
Any other suggestions?

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