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I rooted and flashed my phone last night and everything was fine other than 1 thing. The Wi-Fi wouldn't connect on my home router. I tried several different roms and was left with the same problem where it was stuck on either obtaining ip address or authenticating. I then came into work this morning and the phone connected to my Wi-Fi network straight away.
Does anyone know how I can get around this problem, don't want to be using up all my data at home!
Thanks in advance
Dont get me wrong but did you try to restart the Router?
Sent from my HTC using XDA Windows Phone 7 App
Timzter said:
I rooted and flashed my phone last night and everything was fine other than 1 thing. The Wi-Fi wouldn't connect on my home router. I tried several different roms and was left with the same problem where it was stuck on either obtaining ip address or authenticating. I then came into work this morning and the phone connected to my Wi-Fi network straight away.
Does anyone know how I can get around this problem, don't want to be using up all my data at home!
Thanks in advance
Click to expand...
Click to collapse
I second the other suggestion. Those symptoms sound like your router needs a restart if it hangs at getting IP/authenticating.
I'm having the same problem on the network at my university.
I'm having problems with my wifi as well. We have a network here at my office secured with WEP. My galaxy nexus connects to it just fine but my Nexus 4 refuses. It sees the network, show strong signal but it doesn't seem to connect. I did manage to get it to connect once and I downloaded some updates but then the connection dropped and will not reconnect. I've tried various advanced settings (forcing the network to 2.4GHz, changing the power options, etc... No joy. This is particularly frustrating for me as my micro sim has not yet arrived so WiFi is all I have Hopefully it will work at home. At least there I have access to the router so I can make changes if needed. So far not a fan though.
I've got WiFi problems here, too. Roaming between different WiFi networks (home and university) often results in an non functional WiFi connection. Experienced this problem with stock Android 4.2 on Nexus 4 and Galaxy Nexus and latest CM 10.1 nightly on Nexus 4. Even reboot doesn't help every time.
As workaround: If WiFi connection is broken, turn on "flight mode", wait a few seconds and turn it off again. Works for me, maybe it works for your problems too.
I literally just received my nexus 4, and I haven't done anything with the SIM card yet, I just wanted to get things going on WiFi to start. It sees the network I want, let's me type in the password, and lets me click connect. After that it does literally nothing. No thinking, no obtaining IP address, nothing. Any ideas?
dyslexicpenguin said:
I literally just received my nexus 4, and I haven't done anything with the SIM card yet, I just wanted to get things going on WiFi to start. It sees the network I want, let's me type in the password, and lets me click connect. After that it does literally nothing. No thinking, no obtaining IP address, nothing. Any ideas?
Click to expand...
Click to collapse
I have exactly the same problem. Got the phone today and have tried several different access points - no luck. Restart the phone, no change.
Also, system updates screen said I could only download the update to 4.2 from a wifi connection till the 7th, so i set the date to the 7th and did the update successfully over the cell connection. Still no WiFi. Factory reset - no change.
---------- Post added at 09:18 PM ---------- Previous post was at 09:17 PM ----------
Oh, also tried the flight mode "trick" with no success.
Heartbreak said:
I'm having the same problem on the network at my university.
Click to expand...
Click to collapse
Your uni wifi probably is LEAP wifi or PEAP wifi, which is proven broken in Android 4.2
ecsk said:
Your uni wifi probably is LEAP wifi or PEAP wifi, which is proven broken in Android 4.2
Click to expand...
Click to collapse
It's also broken on my campus. Do you have any suggestions to bypass this?
ecsk said:
Your uni wifi probably is LEAP wifi or PEAP wifi, which is proven broken in Android 4.2
Click to expand...
Click to collapse
My university provides both LEAP and PEAP authentication. LEAP doesn't work for me either. But PEAP works. I'm able to connect via PEAP. (Stock 4.2 / 4.2.1 and CM 10.1)
Here is my log. It appears the authentication is timing out.
12-07 10:42:43.863: I/wpa_supplicant(19563): wlan0: Authentication with xx:xx:xx:xx:xx:xx timed out.
12-07 10:42:45.345: I/wpa_supplicant(19563): wlan0: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='XXXXX' freq=2447 MHz)
12-07 10:42:45.385: I/wpa_supplicant(19563): wlan0: CTRL-EVENT-ASSOC-REJECT bssid=xx:xx:xx:xx:xx:xx status_code=1
12-07 10:42:55.346: I/wpa_supplicant(19563): wlan0: Authentication with xx:xx:xx:xx:xx:xx timed out.
All other devices do connect fine and I even restarted the AP to make sure.
This is getting very frustrating. I couldn't connect to wifi at work (WEP, I know...) at all yesterday. I went home, and my WPA2 network at home worked perfectly. I come in this morning and boom, I'm connected just fine to the wifi here at work (the connection was remembered from my tries yesterday). I went to lunch, came back, no wifi. Reboots, reconnections, nothing seems to work. I also have a Galaxy Nexus with 4.2.1 and it connects to the wifi just fine. Grumble grumble....
-Matt
I did a few tests today and it seems to be only when using WPA2 with a pre-shared key. WPA works, as do open AP's.
jim.k.yee said:
It's also broken on my campus. Do you have any suggestions to bypass this?
Click to expand...
Click to collapse
No solution with stock google image AFAIK, because google does not provide 4.1.2 image for Nexus 4. You can try other custom ROM or ask if some one has successful LEAP wifi story about running custom ROM.
BTW I don't own Nexus 4, I am stilling using Galaxy Nexus, as soon as I upgraded to 4.2 LEAP wifi broke, I flash 4.1.2 back then it works fine.
I found that upgrading the access point (MikroTik) to the latest version allows me to connect.
Seems something in this device does not like some older WPA2 versions?
extremewing said:
I found that upgrading the access point (MikroTik) to the latest version allows me to connect.
Seems something in this device does not like some older WPA2 versions?
Click to expand...
Click to collapse
My N4 has been connecting fine to my home router over the past two days. Suddenly, today, it stopped recognizing the network (shown as "not in range" in wifi settings). No amount of router or phone reboots would get it to connect. I read in another forum about going to Displays in the settings menu, scroll to bottom - Wireless Displays. Turn on and search for wireless displays, then turn off. I thought, wtf? Anyway, I tried this and it connected to wifi immediately. Maybe there's a bug in the wireless display function that's interfering with wifi.
I am actually having a similar issue as others here, but I have found another weird work-around. Basically, although the Nexus 4 see's my campus's network, no packets get transfered back and forth, and I am not even sure what is going on (The IP address, tho, is usually "unknown".) However, upon going to the campus's IT help today, they turned off mobile data, and it then seemed to connect fine over Wifi. Any idea what is going on here?
There is no "signing in" to the network at my university, it just connects and verifies your device's MAC address, so I don't think they are doing any fancy authentication. I was thinking about maybe flashing a different ROM and seeing if I get different results.
i got mine yesterday and it connects then stops connecting after a couple seconds
Atrag said:
I am actually having a similar issue as others here, but I have found another weird work-around. Basically, although the Nexus 4 see's my campus's network, no packets get transfered back and forth, and I am not even sure what is going on (The IP address, tho, is usually "unknown".) However, upon going to the campus's IT help today, they turned off mobile data, and it then seemed to connect fine over Wifi. Any idea what is going on here?
There is no "signing in" to the network at my university, it just connects and verifies your device's MAC address, so I don't think they are doing any fancy authentication. I was thinking about maybe flashing a different ROM and seeing if I get different results.
Click to expand...
Click to collapse
I get exactly the same issue in my office. I can connect to school open network, but after a few minutes it lost connection (while still showing connected). I got to wifi setting, it shows that there is only one wifi hotspot and i am connected to it. But actually there should be more than five hotspot! If i switch wifi off and back on it can detect all the networks and get connected again, but then it goes to the weird cycle over and over.
Strangely, if i stayed in another office, it is connected all the time. Seems like the signal problem in my office. But i got no problem in my office when i was using galaxy nexus.
I am driven crazy by this!
I just bought a nexus 7, came home and spent 3 hours trying to connect this to wifi and it doesn't work... meanwhile i have 9 devices connected wireless that never had problems... -_-
when i first start my NEW nexus 7 and get to select wifi page.. i select my wifi (which shows 3 bars) i enter my correct password and it just loops from "connecting.." to "obtaining ip address" over and over after hour of that i got fed up and tried connecting manually .. i tried using ip/dns from ipconfig in cmd didn't work.. i went to my iphone and copied the wifi adress settings to my nexus 7 and it said connected
but when i went to next i logged into my gmail account and i get this
"Couldn't sign in
Can't establish reliable connection to the server.
This could be a temporary problem. Try again or connect to another Wi-Fi network."
i have no idea what to do ARGGGG HELP PLZ!
MxZeal said:
I just bought a nexus 7, came home and spent 3 hours trying to connect this to wifi and it doesn't work... meanwhile i have 9 devices connected wireless that never had problems... -_-
when i first start my NEW nexus 7 and get to select wifi page.. i select my wifi (which shows 3 bars) i enter my correct password and it just loops from "connecting.." to "obtaining ip address" over and over after hour of that i got fed up and tried connecting manually .. i tried using ip/dns from ipconfig in cmd didn't work.. i went to my iphone and copied the wifi adress settings to my nexus 7 and it said connected
but when i went to next i logged into my gmail account and i get this
"Couldn't sign in
Can't establish reliable connection to the server.
This could be a temporary problem. Try again or connect to another Wi-Fi network."
i have no idea what to do ARGGGG HELP PLZ!
Click to expand...
Click to collapse
Expected it is not any Hardware issue, it seems your pb is related to your PW. try desabling it from your router (just a short time for test) or go to a free wifi place to check.
Also keyboard issue, do you use the standard one?
good luck
lolo9393 said:
Expected it is not any Hardware issue, it seems your pb is related to your PW. try desabling it from your router (just a short time for test) or go to a free wifi place to check.
Also keyboard issue, do you use the standard one?
good luck
Click to expand...
Click to collapse
Had this issue before with a bunch of Samsung phones turns out I had so many devices trying to use the same IP address set up by my router. I had to reset my router and assign each device its own IP address.
Sent from my Nexus 7 using xda premium
May also need to check the routers settings for maximum allowed wireless devices, or maximum dhcp users.
Sent from my Nexus 7 using xda premium
The obvious thing in your router configuration is that connections are being restricted to a list of hardware mac addresses.
peterk-1 said:
The obvious thing in your router configuration is that connections are being restricted to a list of hardware mac addresses.
Click to expand...
Click to collapse
The obvious is that jour Nexus 7 is not working properly, I had exactly the same behaviour tested many changes on my wifi settings, teathering from my phone...=> went back to the shop for an exchange and the new one was working perfectly
Guys, recently bought a Nexus 4 and it normally connects via wifi but can not connect.
I was using the Android 4.2.2 OTA updated to Android 4.3 and the problem persists.
The Nexus 4 connects normally, but the icons of wifi connection and carrier signal are gray instead of blue and even trying to install applications via Google Play or simply access a site via browser do not work and accuse the connection fails.
I was tested and the router's signal is good and other equipment that I usually work (other Android smartphones and notebook).
My router is standard G and I use WPA2.
viamais.net said:
Guys, recently bought a Nexus 4 and it normally connects via wifi but can not connect.
I was using the Android 4.2.2 OTA updated to Android 4.3 and the problem persists.
The Nexus 4 connects normally, but the icons of wifi connection and carrier signal are gray instead of blue and even trying to install applications via Google Play or simply access a site via browser do not work and accuse the connection fails.
I was tested and the router's signal is good and other equipment that I usually work (other Android smartphones and notebook).
My router is standard G and I use WPA2.
Click to expand...
Click to collapse
all routers?
i got the same issue but only on a particular router at home but worked perfectly elsewhere
i ended up changing the router
csara said:
all routers?
i got the same issue but only on a particular router at home but worked perfectly elsewhere
i ended up changing the router
Click to expand...
Click to collapse
Oddly enough, I have the Nexus just 3 days and only had access to the router so far from home, but today I'll look for a router to test the public.
But either way it's frustrating the Nexus 4 have these compatibility issues when connecting to a wifi router.
Before making the switch router, is it not possible to find out which configuration of WLAN could cause this? Does Google do not have this documented?
i feel your pain, been there
it could be your router, from the way it assigns ip addresses to your type of encryption. by any chance is it a linksys G router? that was my problem before until i just decided to get an N router.
did you try switching to WEP or open to see if the problem persists? or changing your gateway ip address? or changing which ch your wifi is on?
never hurts to try
Should factory reset your router and upgrade firmware first, then immediately connect to it without encryption and see if it work.
Is anyone else having issues with the 6P or just Marshmallow in general of not being able to connect to any wifi?
think that means connected to network but no internet available
Did you try connecting to a different Wifi network and see if you are having the same issue? I did not see an issue. Might be your router or modem is blocking internet access for your device.
chichu_9 said:
Did you try connecting to a different Wifi network and see if you are having the same issue? I did not see an issue. Might be your router or modem is blocking internet access for your device.
Click to expand...
Click to collapse
Yes, I tried connecting to multiple wifi networks and it's showing the same thing: "connected, no internet". When I try with another device or laptop, it connects fine to all those wifi networks. It's just my Nexus 5 and 6P running Marshmallow.
I searched around and tried to use a static IP, also changed the frequency band from automatic to 2.4 GHz. Nothing works.
Go to Backup and reset and try a reset on network settings and see if that resolves the issue.
OK, this is interesting. I just found out from a colleague of mine (I'm currently traveling in China), that this is basically saying you are connected to the Internet, but just not to any of the Google services. I just checked and it seems everything pretty much works, except I can't access gmail, Facebook, etc. anything that's blocked by the Great Firewall of China.
Dial *#*#4636#*#* on your phone and select phone information & select run ping test and see if it pings google services. It should have been defaulted to Google, atleast it is on myn.
I'm running into the same issue, but I'm in the US. No WiFi network works. And I don't actually have internet.
The odd thing is all my other devices connect to the networks just fine.
I already tried resetting network settings, and rebooting in safe mode, to no avail. I even reset my router to stock and reconfigured.
Anyone else having similar issues?
Sent from my Nexus 6P using Tapatalk
hicdub said:
I'm running into the same issue, but I'm in the US. No WiFi network works. And I don't actually have internet.
The odd thing is all my other devices connect to the networks just fine.
I already tried resetting network settings, and rebooting in safe mode, to no avail. I even reset my router to stock and reconfigured.
Anyone else having similar issues?
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
I have this - and I am in China. Still getting internet, just not the blocked services and data. I can get the google stuff with vpn, but the exclamation and wireless remains. Cheers.
hicdub said:
I'm running into the same issue, but I'm in the US. No WiFi network works. And I don't actually have internet.
The odd thing is all my other devices connect to the networks just fine.
I already tried resetting network settings, and rebooting in safe mode, to no avail. I even reset my router to stock and reconfigured.
Anyone else having similar issues?
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
Yes, I'm having this issue with 6.0.1 a different nexus 6p. Wife's galaxy s6 connects to cable service WiFi but I get no internet. Doesn't even ask for password Ike hers does. She's run Ning 5.1.1. Anybody find a solution? Thx
Nexus 6 WiFi and Internet trouble too...
I have a rooted nexus 6.01 (rooted about a week ago), was working perfectly until last night...
I initially looked at Instagram and noticed pics were not loading... Other devices worked fine... Rebooted router...
Anyway... My phone has Internet atm but with exclamation mark next to WiFi. I get same problem with 2.5ghz and 5ghz.
Instagram not loading any pics
Facebook says no Internet
Google Play Store seems quite slow at loading pics
Strava not loading map pics
Imdb not loading pics
Basically... Apps seem to be having pic loading problems
Anyways... Technical info...
Virgin superhub 2, 5ghz, 200mbs
Nexus 6.01
Nexus 6 baseband: mdm9625_104662.22.05.31r
Kernel: 3.10.40-g557ba38
[email protected] #1
Wed Nov 4 00:29:43 utc 2015
TWRP 2.8.7.1
I use greenify, adblock plus, and phone profiles too, which have rooted system access
Does anyone have any idea what's going on?
Thank you
Demon
---------- Post added at 08:45 AM ---------- Previous post was at 08:40 AM ----------
Oh bottom wrong nexus model... I'm sorry... Didn't notice ?
Sorted it... was my wifi... I changed the channel settings to Auto Performance, then back to Auto Compatibility, and all working again now
Wanted to add for what it's worth: I had the exclamation point on any wifi I connected to and fixed the exclamation point by disabling Adblock Plus.
I've been getting the WiFi exclamation point also. Would AdBlock Plus cause that?
rebretz000 said:
I've been getting the WiFi exclamation point also. Would AdBlock Plus cause that?
Click to expand...
Click to collapse
yes ad block was causing it for me too.
i disabled ad blocking from the app, froze the app from titanium backup, removed root access to adblockplus from super su and rebooted and everything is working fine now
Same problem here.
Hard reset and nothing.
The weird thing is that in my house works just fine (5 ghz)
Also, google alread knows
https://code.google.com/p/android/i...tars Reporter Opened&groupby=&sort=&id=210378
Nexus 6p in China
I am in China. 6P wifi / internet hook up worked fine with Comcast in the US. When I arrived in China I could connect to wifi but it reported no internet access. Went to a Huawei store and they tried hooking up to their local wifi. Same thing - no internet access but connection to wifi made. They sent me to a Huawei testing center 10 minutes away. Got there, the same thing. They could connect with their local wifi but no internet interface. Then they told me they had no permissions to work this phone because it was not authorized inside China. I asked if they could research why it the internet won't connect. They put in a Chinese sim card. WHAM - They could log into the wifi and get internet. Next I tried VPN to see if there was some kind of work around but no avail - VPN needs the internet. The best thing I could I could was to call my service provider to bump up my roaming data speed (Be careful about roaming plan you have - cost $$$$). I have minimal internet access through phone but its not blocked - I can get google.
try fixing ur time
tl;dr: When my phone (Sony Xperia Z5 compact, Android 6) connects to a wifi with no internet, I want to use the local network on the wifi but use the internet from my mobile data. Instead what happens mobile data doesn't switch back on while connected to wifi with no internet.
I have been trying to find a solution for this since forever. My camera creates a local wifi connection which I can connect to to view the camera as well as controlling it. The downside is that while connected to this network my cellular data gets switched off, despite this wifi network not having any internet. So while using my camera I have no way to access the internet. It wasn't a huge problem up until recently when the app I use is introducing livestreaming. I really want to use it but I am unable to find any way how to keep my phone connected to this wifi network (and being able to use it), while any internet data goes over 4G. I am using android 6.0.1. I am quite sure I was able to do this on my previous phone with an older Android version but I cannot find said option (smart network switch or something?) anymore in the wifi settings. Nor any recent similar topics with people with the same question? Anyone that knows more about this?
My phone is rooted. If I need to do any system changes I can do that.
I didnt get what you were trying saying.Do you know that you cant use mobile data and wifi simultaneously unless your device is rooted.If your phone is rooted then try using "download booster"
hh950430 said:
I didnt get what you were trying saying.Do you know that you cant use mobile data and wifi simultaneously unless your device is rooted.
Click to expand...
Click to collapse
Err, sorry, lol. I have wifi network that has no internet, just a local network. I'd like to be connected to that wifi network AND be able to use internet over my mobile data both at the same time. As it is right now, my mobile data gets disabled even when the wifi network has no internet access.
I have talked to two friends of mine about it and both say this is already possible in Android. One friend sent me a screenshot of an option he has in his wifi settings called 'Switch to mobile data' which gets enabled when the wifi network has no internet. My other friend said he doesn't have this option but claims it has been a default feature of Android since lollipop. He tested it on his phone and indeed it works as expected. Both have an unrooted phone with stock Android. So now there is me with my brand new phone and Android 6 and I can't find this option nor does it seem to do what I want by default. I'm confused.
As I mentioned, my phone is rooted so if there is a way to turn this feature on using root, I can totally do that if someone knows how.
As i said try using "Download Booster" It allows you to use wifi and mobile data at the same time just google it.
hh950430 said:
As i said try using "Download Booster" It allows you to use wifi and mobile data at the same time just google it.
Click to expand...
Click to collapse
That appears to be just a download manager if I am correct? I don't need to download anything. I just want to be able to use my existing apps to use my mobile internet when I am connected to wifi (that has no internet).
This is the exactly the thing I'm after. Screenshot from my friend's phone (LG G4 with Android 6.0): (*link removed). My other friend who also has this functionality working has a Nexus 5 with Android 6.0.1.
* Forum doesn't let me post screenshots.. But basically in his wifi settings he has an option called "Switch to mobile data". The box says "Internet unavailable via connected Wi-Fi. Stay connected to Wi-Fi, but use mobile data. Data charges may apply."
Again, I have Sony Xperia Z5 compact with Android 6.0.1 and I can't find this. Have I bought the wrong phone or is it fixable? At this point I am more than happy to even take a custom rom route.
You cannot use wifi and internet at the same time as they are completely different hardware components, using different air waves, so there's no conflicts between them. Better use internet through your wifi or use bluetooth tethering.As for the "switch to mobile data option" it disconnectes you from your wifi if it has no internet and connects you to your mobile data so it doesnt lets you use your wifi and mobile data at the same time
hh950430 said:
You cannot use wifi and internet at the same time as they are completely different hardware components, using different air waves, so there's no conflicts between them. Better use internet through your wifi or use bluetooth tethering.As for the "switch to mobile data option" it disconnectes you from your wifi if it has no internet and connects you to your mobile data so it doesnt lets you use your wifi and mobile data at the same time
Click to expand...
Click to collapse
It actually clearly mentions that it keeps connected to the wifi. He tested it and indeed he could use the local network on the wifi side and use the internet through his mobile data simultaneously. Both friends haven't rooted their phones or anything. This is just a default functionality for them. I have now tested it also on my older phones (Oneplus One and HTC One M8) and all phones can't have both connections open at the same time.
This wifi network is created by my camera by the way and I can't change much about it. The DJI drone I control does the same thing. When I am connected to the camera or drone I lose my mobile internet connection.
I don't have any other device that has access to internet here. We don't have cabled internet, only mobile internet.
Interestingly, in the developers options there is an option called "Mobile data always active" ("Always keep mobile data active, even when Wi-Fi is active"). I've tried it many times, rebooted my phone but this doesn't actually do anything. Even with this option on when wifi is connected the mobile data gets turned off.
This is beyond annoying!
I too have struggled to find a solution to this problem. I do not have a WAN connection to my home network. It is LAN only. I have four PC's, three Sonos speakers, two hdhomerun TV tuners, and various hand held devices that all use the LAN. All I want to do is be able to use my Moto X Pure to control Sonos and file sync to my LAN via wifi and simultaneously use mobile data for WAN stuff. I know the mobile connection is active with wifi enabled because I can see it when running if config, up route show etc... I am trying to learn about the routing tables to see if I can fix this myself. I love my android devices and am loyal, but this is beyond dumb! Any suggestions????
How to fix for android
okay so for anyone who doesnt know still go into the about phone option in your phone settings, then click on kernel version, build model, etc til one pops up with a flash notification saying click so many more times and youll become a dev. once you done that go into the developer menu and scroll too wifi assist or force mobile data upon wifi connection. exit out , open your app , bobs your uncle
Thank you for the answer.
I tried with my Huawei but it doesn't work. Could you tell with which phone you made it work ? Thank you !!
Ok here we go, after 12 years this my first post.
Above suggestions related with developer options nothing to do with OPs requirement. Those option only allows the device rapidly switch to mobile data when the WiFi signal gets weak. Since you always close to your DSLR camera it solves nothing because WiFi signal is always strong.
Root cause of the problem is you can not have 2 default gateways (i.e. router address) for your networks in any operating system (Actually you can but you have to set static routes, which is a pain in the ass for regular users)
iOS handles this in a very simple way. Set your wifi connection to static IP address instead of DHCP and leave your default gateway or router address blank. Viola you can have 3G/LTE data while you connected your camera and now you can sent your downloaded pictures via Whatapp while you still connected to your camera via WiFi. (In my case Panasonic Lumix)
I stumbled upon this thread via Google since I needed the same thing now with Android. But iOS way failed. Actually I am shocked that you cannot leave WiFi Gateway address blank in Androdid 8.0! Save button grays out if you leave it blank. This is really weird. At least with Galaxy S8 Duos with Android 8.0
So anybody know how to setup a WiFi network without a default gateway, please share.
Is this phone specific or something? Never had that happen, I have no problem with wifi being on without internet and using cell data.
I don't think the UI really exposes anything like it directly but you can technically have multiple gateways; it's not something your average user will understand (policy routing)..
Having said that, if you're attached to an AP you should at least see a /24 route out your wireless interface (standard dhcp lease). It's quite common for the AP to have client isolation but are you sure you're not using something like Wifi Direct or even adhoc?
Similar Experience
I have been through this experience long ago. All I did was to sell the phone and bought a new one.