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[Q] dropping wifi signal ???

anyone else experience wi fi issues ??? tablet keeps losing signal ?? laptop is perfect also my phone is full signal to ?? any fix for this ?? thanks

I posted a thread in this section about the same thing called "wifi strength". It is a problem with the antenna, it gets REALLY bad reception. Mine gets 25db less than my phone in the same exact spot in my house so it is obviously an issue with the tablet.
Someone in the general section replaced the antenna and said they got significantly better results, but it looks like no one has found a US vendor for the antenna yet.

I had this problem. If you have your Wifi set to stay on all the time (even when the tablet sleeps) the Wifi will not reconnect when you wake it up. It's something to do with the rotation of the Wifi address (DHCP).
Change the Wifi disconnect setting to "when the screen goes off." That fixed my problem.

If you setup a static ip address for your connection it will stop dropping the connection. Also, there is a fix for this in the development section. Search for wifi dhcp fix and install it.

Here is the file you need, you have to flash it through recovery so if your not rooted your out of luck. Otherwise the static ip trick should fix your problem.

I've been having problems with this recently. My a500 worked fine for ages, then started playing up when I got a new wireless router (Netgear DGND3300v2). It would keep dropping out, despite my other wireless devices working even better. If I turned the wireless off, it would take ages to reconnect, or not reconnect at all.
My issue was caused with the 11G channel on the wireless router being set to auto. I changed this to 6 and as soon as I did that, it worked flawlessly. Not had 1 problem since.

cruise350 said:
Here is the file you need, you have to flash it through recovery so if your not rooted your out of luck. Otherwise the static ip trick should fix your problem.
Click to expand...
Click to collapse
Many thanks for posting this fix cruise.
I am on Timmydean's 3.2.1. (rooted)
Could you explain how to install this fix?
Many thanks

Help with fixing Wi-Fi

I have reached my wit's end trying to resolve my problems, so I'm posting here for ideas on fixing this, any input is appreciated!
When this started I was on stock, rooted, ICS 4.0.3 and had been for months. My wife has a nexus s with the same config and hers works fine.
Last week, my daughters sidekick 4G stopped having wi-fi internet connectivity. I turned her wi-fi off, then back on and it was fine and has been ever since. Later that night, my nexus did the same thing, the same procedure resolved it. Ever since then, my wi-fi will only work for 1-5 minutes after turning the wi-fi on. This is the only thing I can think of that changed that could have caused this. This was the first night we connected her sidekick to wi-fi.
The wifi symbol is up there, it'll be blue for up to half an hour, but won't have internet connectivity for long. One thing I noticed pretty quickly was that even though the grey wi-fi symbol is there, I can't access the router settings at 192.168.1.1 from the phone. I thought the grey wifi symbol still indicated I was connected to the router still, but it's not working. Each time this happens, I can turn wi-fi off, back on immediately and it'll work for 1-5 minutes. It appears that the more I constantly use it after turning it back on, it seems to maintain connectivity longer.
Last weekend, just after these issues started, I visited my sister and my phone operated on her wi-fi all weekend just fine.
When I came back home, my problems started immediately.
Here's what I've tried in pretty much the order I tried them:
I started by uninstalling avast, facebook, and autostarts
selected "Forget network" in access points screen and reconnected
Factory reset
Wipe dalvik cache & fix permissions
see if it worked without sim card in (it didn't)
flash GB broadcom driver
Switched router channel from 6 to 1
flash stock 2.3.6 (wi-fi problems still present)
flash OTA ICS (still had problems)
flash stock 2.3.6
flash OTA ICS
re-root
Flash PixelROM 1.60 LiteTouch
factory reset router (No wifi problems on using open network and default SSID for 30 minutes!)
resetup WPA Personal security and rename SSID same as before
Worked for another 15 minutes or so after this
flashed stock 2.3.6
flashed OTA ICS
re-rooted
Restored nandroid backup - quit working after this step
Factory reset router - worked for about 15 minutes, I decided I was ok so I setup security and SSID as before, then it quit working again
flashed PixelRom 1.60 LiteTouch
flashed stock 2.3.6
Flashed OTA ICS - THIS time I did not restore my google backups from the cloud, fearing that this was somehow restoring something that was causing me problems. It did not help.
Changed SSID on my router and reconnected phone
I have spent countless hours trying to fix this. I don't believe it's the hardware because the router factory reset seems to help quite a bit, works fine on unencrypted default router settings, and it worked on my sister's wi-fi.
I have nmap and wireshark and have a basic working knowledge of them. I have adb setup and usable on my computer. I also have dd-wrt installed on my router and have for years. Is there any kind of IP or hardware logging I could perform with these tools to help figure out what's going on??? ANY help is GREATLY appreciated!!

Well i'm no expert with any of this, but it sounds more like a router issue.. If both your sidekick and nexus have the same characteristics of failing wifi, it cant be the devices..
If you've already reset your router and it does the same exact thing, maybe it is something wrong with the router itself. You said it connected fine at your sisters house, so it cant be any hardware within the phone.. The only thing I could think of is maybe try a different router in your house to see if it works? If that helps get rid of the connectivity issue, then you can just get a new router and be happy with the wifis

I don't think a *hardware* problem with the router would only affect 1 device connecting to it wirelessly. I would think that kind of issue would affect all devices on the network.
Which makes me wonder if there's a setting on the router that may be causing it somehow, or some combination of packets might somehow cause the router to block my phone.
But again, I'm open to ideas here and I appreciate your input. I think getting another router will be my next step if I don't hear anything better by the time I get my next paycheck.

nevarDeath said:
I don't think a *hardware* problem with the router would only affect 1 device connecting to it wirelessly. I would think that kind of issue would affect all devices on the network.
Which makes me wonder if there's a setting on the router that may be causing it somehow, or some combination of packets might somehow cause the router to block my phone.
But again, I'm open to ideas here and I appreciate your input. I think getting another router will be my next step if I don't hear anything better by the time I get my next paycheck.
Click to expand...
Click to collapse
Ohh, I thought you had said that both the sidekick and nexus were having problems connecting. My bad.
But yeah have you changed any settings on it lately? Or messed with anything related to the router? Some setting may be kicking your device off after 5 mins, maybe some frequency setting or something dumb like that, I have no clue.
I know how it feels to have funky wifi, so I was only trying to help. good luck

Have you removed DD-WRT from your Wireless Router and back to stock OS? I had a Linksys router with DD-WRT and after about 3 years it started working so weird it became useless with any device. Had to buy a new one.
BTW, are other devices connecting fine to this router?
As swamp goblin stated, I would try with a new router.

It sounds like an issue on your router (or AP) with mixed client settings. I have had this issue with an old Netgear AP.
Try forcing "WPA2 with AES only" if all clients support it, otherwise force "WPA with TKIP only". If you have mixed B/G/N devices, force the fastest mode that all devices support. I use "G only".
Then remove and re-add the router on all your devices.
Also check for router firmware updates, and if you use DD-WRT firmware, find the Wiki page for your model and revision and use the suggested build there. The DD-WRT database they have is a mess and should not be used!

swamp goblin said:
Ohh, I thought you had said that both the sidekick and nexus were having problems connecting. My bad.
But yeah have you changed any settings on it lately? Or messed with anything related to the router? Some setting may be kicking your device off after 5 mins, maybe some frequency setting or something dumb like that, I have no clue.
I know how it feels to have funky wifi, so I was only trying to help. good luck
Click to expand...
Click to collapse
I haven't changed any settings, until this problem began, which makes this even more maddening. I appreciate your input regardless
Oogway13 said:
Have you removed DD-WRT from your Wireless Router and back to stock OS? I had a Linksys router with DD-WRT and after about 3 years it started working so weird it became useless with any device. Had to buy a new one.
BTW, are other devices connecting fine to this router?
As swamp goblin stated, I would try with a new router.
Click to expand...
Click to collapse
I haven't removed it. I thought I had a model that couldn't go back to stock, but I WILL be looking into this. The other devices connecting fine are Sidekick 4G, Wife's Nexus S, Acer Aspire one, HP tx2000 laptop, and my wife's HP laptop. I also have my satellite receiver connected via ethernet.
SpookyTunes said:
It sounds like an issue on your router (or AP) with mixed client settings. I have had this issue with an old Netgear AP.
Try forcing "WPA2 with AES only" if all clients support it, otherwise force "WPA with TKIP only". If you have mixed B/G/N devices, force the fastest mode that all devices support. I use "G only".
Then remove and re-add the router on all your devices.
Also check for router firmware updates, and if you use DD-WRT firmware, find the Wiki page for your model and revision and use the suggested build there. The DD-WRT database they have is a mess and should not be used!
Click to expand...
Click to collapse
I will certainly try these settings. Thanks for the tip on the wiki page

I had this problem too, I solved only flash again my radio...
Try if solve...
Or if don't work try to make a reset.
Sent from my Nexus S using Tapatalk 2 Beta-4

SpookyTunes said:
...Try forcing "WPA2 with AES only" if all clients support i...
Click to expand...
Click to collapse
THIS FIXED IT! I tried it first since it was the simplest solution and I've been 4 days with no loss of connectivity since I changed it to AES only, which all my clients do support! Thanks so much!

Wifi won't stay connected (not D-Link problem)

My phone has problems staying connected to wifi. It's often disconnected and has to reconnect when I wake my phone up (even though it's set to not turn off during sleep) and it'll disconnect and reconnect sometimes even when the phone is awake. I've read about people having problems with D-Link routers, but none of my routers are D-Link. The problem seems to have improved a lot after I flashed my modem to the MDL modem, but it still comes up. Does anyone have any solutions or would anyone know what could be causing this? I'm currently running the Wicked rom but I had this problem even when my phone was completely stock. Has anyone had this problem go away after switching to an AOSP-based rom?

AZImmortal said:
My phone has problems staying connected to wifi. It's often disconnected and has to reconnect when I wake my phone up (even though it's set to not turn off during sleep) and it'll disconnect and reconnect sometimes even when the phone is awake. I've read about people having problems with D-Link routers, but none of my routers are D-Link. The problem seems to have improved a lot after I flashed my modem to the MDL modem, but it still comes up. Does anyone have any solutions or would anyone know what could be causing this? I'm currently running the Wicked rom but I had this problem even when my phone was completely stock. Has anyone had this problem go away after switching to an AOSP-based rom?
Click to expand...
Click to collapse
I still have this problem, it disconnects and reconnects minutes later. I am on stock, stock kernel and rooted. could it be a root problem?

It can't be a root problem because I had this problem even when the phone was completely stock. I'm wondering if it's a TW problem, which is why I asked if anyone still had this problem after switching to AOSP (the Wicked rom I'm running now is TW).

If it were me, I would try a different modem, but thats just me.

Is there a thread with the available modems?

AZImmortal said:
Is there a thread with the available modems?
Click to expand...
Click to collapse
What device are you on, could be another fix.

AZImmortal said:
My phone has problems staying connected to wifi. It's often disconnected and has to reconnect when I wake my phone up (even though it's set to not turn off during sleep) and it'll disconnect and reconnect sometimes even when the phone is awake. I've read about people having problems with D-Link routers, but none of my routers are D-Link. The problem seems to have improved a lot after I flashed my modem to the MDL modem, but it still comes up. Does anyone have any solutions or would anyone know what could be causing this? I'm currently running the Wicked rom but I had this problem even when my phone was completely stock. Has anyone had this problem go away after switching to an AOSP-based rom?
Click to expand...
Click to collapse
Just because it isn't a DLINK wireless ap doesn't mean you won't issues. All the consumer-grade wireless routers/ap's share a narrow range of chipsets made by broadcom, atheros, etc.. So, the brand has nothing to do with it.
I would suggest getting a logcat if you can or try another wireless ap somewhere else. I've got a TPLINK wireless router with OpenWRT flashed, runs flawless.

TheAxman said:
What device are you on, could be another fix.
Click to expand...
Click to collapse
SGH-I337 (AT&T)
chaosclarity said:
Just because it isn't a DLINK wireless ap doesn't mean you won't issues. All the consumer-grade wireless routers/ap's share a narrow range of chipsets made by broadcom, atheros, etc.. So, the brand has nothing to do with it.
I would suggest getting a logcat if you can or try another wireless ap somewhere else. I've got a TPLINK wireless router with OpenWRT flashed, runs flawless.
Click to expand...
Click to collapse
I never said that only D-Link routers have problems. There's a well-known issue with D-Link routers so I wanted to state up front that I don't have any D-Link routers in case anyone wanted to suggest that it could be the cause.
http://www.zdnet.com/samsung-acknowledges-galaxy-s4-wi-fi-connection-problem-7000015431/

Does anyone have any solutions/possible causes?

From another thread...
http://forum.xda-developers.com/showpost.php?p=43495950&postcount=60
and
http://forum.xda-developers.com/showpost.php?p=43501841&postcount=64
See if that helps your issue and if it does make sure to thank the original poster of the threads. Good luck.

scott14719 said:
From another thread...
http://forum.xda-developers.com/showpost.php?p=43495950&postcount=60
and
http://forum.xda-developers.com/showpost.php?p=43501841&postcount=64
See if that helps your issue and if it does make sure to thank the original poster of the threads. Good luck.
Click to expand...
Click to collapse
Thanks, I actually came across that solution already but I don't seem to have that option under the advanced options. I'm not sure if it's because I'm running the Wicked rom.

AZImmortal said:
Thanks, I actually came across that solution already but I don't seem to have that option under the advanced options. I'm not sure if it's because I'm running the Wicked rom.
Click to expand...
Click to collapse
He said the option was only available while originally connecting and setting up the connection for the first time. Maybe you can try to delete the wifi connection all together and then let it re-detect and go through the set up process again...if that is an option.

My phone was doing this on my friends router but not on my home router. He searched google & found something stating that the S4 dont like routers with AES encryption for the security. He changed his router security to TKIP+AES encryption & the next time I was there wi-fi stayed connected with no constant reconnect problems. Buuuut, my home router security is just AES & I have no issues connecting to it, yet at least. Dont know if this will help anybody else out but its worth a shot to play with your routers security settings.

I thought I had an issue with my I337 S4 do the same thing.turns out my phone was just bouncing around trying to connect to 6 other open WiFi signals I've used

So just to give an update, I tried installing another router in my house as an access point and the phone has no problems staying connected to it, so there's definitely something that the phone doesn't like about the other routers that I'm running. I'm reluctant to say that there's anything "wrong" with my old routers because no other device had a problem staying connected, but if anyone else experiences the same problem, changing routers/APs could work. Fwiw, my old routers had Broadcom chipsets while the new one has an Atheros chipset. I'm going to try updating the firmware for the old routers to see if it helps (I run DD-WRT and Tomato on all of my routers).

AZImmortal said:
Thanks, I actually came across that solution already but I don't seem to have that option under the advanced options. I'm not sure if it's because I'm running the Wicked rom.
Click to expand...
Click to collapse
I'm having the same constant-disconnect issue as well and searching for solution.
I'm rooted, on stock rom and cant find any "key management" option at initial connect. Issue was happening when unrooted as well.
No issues when connected to router at work, but have connected two other, albeit older android devices to home router without issues.
home router is dlink dir655

bo8 said:
I'm having the same constant-disconnect issue as well and searching for solution.
I'm rooted, on stock rom and cant find any "key management" option at initial connect. Issue was happening when unrooted as well.
No issues when connected to router at work, but have connected two other, albeit older android devices to home router without issues.
home router is dlink dir655
Click to expand...
Click to collapse
Try WPA2 Personal TKIP+AES

Craptain Krunch said:
Try WPA2 Personal TKIP+AES
Click to expand...
Click to collapse
Thanks, forgot to mention the router is already set to TKIP+AES.
However, upon confirming this morning, it is set to auto WAP/WAP2. Will try WAP2-only tonight, unless this won't make a diff?

bo8 said:
Thanks, forgot to mention the router is already set to TKIP+AES.
However, upon confirming this morning, it is set to auto WAP/WAP2. Will try WAP2-only tonight, unless this won't make a diff?
Click to expand...
Click to collapse
WPA/WPA2 decreases the bandwidth of the router. WPA2 will support a full 300Mbps link state. So yea, they are different, but it may not fix it.
I have a Cisco EA6500, so I'm connected to the AC 5Ghz band, and it works flawlessly. WPA2 Personal

My bad on typing WAP instead of WPA.
Doesn't sound like fully opening up the bandwidth will fix it.
Has something to do with how the phone manages the encryption keys?

[Q] Wifi won't stay connected.

Is anyone else having issues with Wifi not staying connected? For example, it'll keep dropping out from my router every 3 minutes or so. When it drops out, the 3G will enable for a few seconds but then it will connect back to the router.
Is anyone else having this issue? What did you do to fix it?
Cheers

Are you rooted? Have you done any mods? Perhaps you should check the advanced settings in the WiFi option
Sent from my GT-I9505 using xda premium

Hi,
No I'm not rooted. No mods at all. 100% stock firmware. I have checked the Advanced Wifi options but can't see anything wrong.
Just to mention, I did at first think it might have been a fault with the phone so I got the phone swapped out with another brand new device however the problem still persists.

I have a similar problem on a i9505 running the latest CM 10.2 nightly.
Some 2.4GHz networks are fine, others behave as you describe.
The one 5GHz network to which I have access has recently started to misbehave; the phone connects properly and works for about 2 minutes, after which I lose all connectivity (I can't even ping the router) yet the wifi indicator remains blue. Turning wifi off and on again gives me another 2 minutes. This goes on until I give up and switch to 2.4GHz.
Of course, I have no idea what is causing this. I've tried various channels on the router, as well as rebooting it.

Does this happen to all routers (I assume you use other routers somewhere else), or it just happen to this router only? Is this case, you may want to check the router itself.
Sent from my GT-I9500 using xda app-developers app

Frequent disconnections occur on all 2.4GHz networks. As for the 5GHz, I've only got access to one router on which to test it.
Sent from my GT-I9505 using Tapatalk

I've only tested it on my router.
As I say, I thought the phone was faulty so I swapped it out but the one I swapped it out with had the exact same issue.

cined said:
Is anyone else having issues with Wifi not staying connected? For example, it'll keep dropping out from my router every 3 minutes or so. When it drops out, the 3G will enable for a few seconds but then it will connect back to the router.
Is anyone else having this issue? What did you do to fix it?
Cheers
Click to expand...
Click to collapse
I had this problem and solve it...
just dial this: *#0011#
and then press menu and choose wifi and change WIFI Power Save Mode to: OFF
notice that every time you reboot device it is back to ON

ace_of_spades021 said:
I had this problem and solve it...
just dial this: *#0011#
and then press menu and choose wifi and change WIFI Power Save Mode to: OFF
notice that every time you reboot device it is back to ON
Click to expand...
Click to collapse
A couple of things concern me about this method though. Do we know what setting that mode to OFF actually does? I've heard reports that the phone gets quite hot and battery drains.

cined said:
A couple of things concern me about this method though. Do we know what setting that mode to OFF actually does? I've heard reports that the phone gets quite hot and battery drains.
Click to expand...
Click to collapse
ok you are right... so I upgrade my modem's firmware and now every thing is good and wifi stay connected :highfive:

ace_of_spades021 said:
ok you are right... so I upgrade my modem's firmware and now every thing is good and wifi stay connected :highfive:
Click to expand...
Click to collapse
Well I've tried 2 different routers now and 2 different Mini s4's and it's still disconnecting. What router do you have?

cined said:
Well I've tried 2 different routers now and 2 different Mini s4's and it's still disconnecting. What router do you have?
Click to expand...
Click to collapse
zyxel p-660HW-T1 v3
my firmware: V3.70(BYD.6)D0_20121108 | 11/08/2012
Sent from my GT-I9505 using Tapatalk

Well I got my phone swapped out (3rd one now) and I'll see how it goes.

Ni !^^ what us Your Android version ans MoDem actually? If you have that it s probable due to that i think..
Or maybe Your are a doesntt support Very well Your fréquences for match Your mobile?
Have you try to make a Fullwipe? For put tint everything restant as when you have buy it?
You will be on a custom rom with ni mldem update i dont say but chère..

WiFi still disconnecting even on 3rd device...

Wiping /system and flashing a newer nightly fixed the 2.4 GHz problem, but 5GHz is still dodgy. It's not the (Netgear) router as I have a couple of other Cyanogenmod devices which operate without any problem.
Perhaps I should start another thread as this may well be something different from what is affecting the op's device.

Wifi stays connected but loses internet access

After the upgrade to Lollipop on my Yoga 2 830, I'm noticing that the wifi gets no internet access even while connected every so often. I have to turn off and turn back on the wifi for it to reconnect. Is anyone else having this issue? I don't have any issues w/ any of my other devices connected to wifi.
I'm not on static IP, no issues with the router. I didn't have any issues on kitkat. Please share if you also have this issue. Thanks.

Thorin78 said:
After the upgrade to Lollipop on my Yoga 2 830, I'm noticing that the wifi gets no internet access even while connected every so often. I have to turn off and turn back on the wifi for it to reconnect. Is anyone else having this issue? I don't have any issues w/ any of my other devices connected to wifi.
I'm not on static IP, no issues with the router. I didn't have any issues on kitkat. Please share if you also have this issue. Thanks.
Click to expand...
Click to collapse
Hello!
Did you try connecting your device to another wifi network to see if the problem persists?
I have noticed something similar happening with my Xperia Z ultra after it upgraded to lollipop. I realised that it was happening only on the older wifi routers (I use an ancient Linksys WRT54G), but seems to have no problem with the newer ones.
Changing the channel of your wifi router might help alleviate the problem. I am not certain if it would work in your case, but if you do not have another router handy, this just might do the trick. If you are looking to change the channel, an easy guide is available here.
I hope this helps

I've got a Netgear AC1900 nighthawk with a netgear ex6200 range extender. The tablet is primarily connected to the 5ghz band on the nighthawk. I do have other routers but they are older. I might have to try to take it to work and see if I lose internet access.
I've changed the bands around and it does help. I've rebooted the router, rebooted the tablet, forgotten the wifi and so on. It's still happening after some time. By the looks of it, there are others that have experienced this on other devices. I haven't done a factory reset. I would prefer not have to go through the setup again.