Weird Wi-Fi problem - Galaxy Note 3 Q&A, Help & Troubleshooting

My rooted International N9005 LTE, stock rom, build number KOT49H.N9005DXUENE4, baseband N9005DXUENE3, has a weird problem never experienced on my phone before.
After I connect to ANY wi-fi, I have just seconds before "your wifi connection is unstable" message. Sometimes I can download/open web with it, until I simply can't. Then I reboot my phone, and I am able to surf the web once again for a limited time.
Any ideas what the heck/wtf/what the hell is going on here and how to fix this?

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WiFi problems

Hello! I have some annoying problems with wifi.
1. Sometimes network that i want to connect to, is simply listed as "Not in range". Turning wifi off and on usually fix that.
2. Sometimes network is detected, but phone won't automatically connect to it (it will just show Remembered at the network and disconnected at the top). I have to manually click on the network and select Connect. After that phone will eventually connect to the network, but it will take much longer than normal.
These issues are resolvable manually, but it's annoying. I want my phone to automatically connect after i just turn on wifi.
Any ideas, what could be wrong? Does maybe have to do something with SuperPower program that i have installed?
My specs are in the signature. Similar issues were also happening with RAFDROID HD 1.0 and darkstone's Froyo SuperRAM.
3. Sometimes when browsing the web or watching youtube videos, phone will simply disconnect and one of the above issues will occur. So no automatic reconnect.
Also i forgot to mention that in issue 1, phone don't see any network, not just mine.
Please help, it's very annoying.
Bump. Anyone?
This issue is annoying as i have to reboot my phone frequently to fix this.

[Q] data packet problem

HI
I have galaxy tab P5100
While browsing the internet somethimes the page will stop loading and it says there is no connection,
same when i'm tethering via usb or wifi to my computer and i'm playing online game it disconnects me
every few minutes and i have to wait untill the connection is restored
It happens so often i can say it's a big issue
I can see the small icon 'H' and green arrow flashing but there is no connection
Then after a while it switches to '3G' then 'H' and finally to 'H+' and the connection is restored
I've read that 'it's a well knows bug' and tried some solutions but nothing helps
I'm sure its not the network as i've used sim card from Three,T-mobile and Talkmobile
everytime same problem
Please maybe somebody had same problem and knows how to fix this

losing connection

Ive experienced that my nexus 4 sometimes loses data connection in certain areas, which my old iphone never did there. I can still call but data connection is lost. This doesnt happen with wifi. I then have to go to the APN settings, push on my provider's APN again, even though its already selected, and then it usually starts working again.
Has anyone else experienced this? Im not sure now if i should RMA this device or if its just an android bug.
http://forum.xda-developers.com/showthread.php?t=2009288

Wifi Problem: notifications/sync problem when the phone is on wifi

I have a tmobile Samsung Galaxy s4. It is not rooted. I have it updated to the latest update.
Whenever I keep the phone on wifi and the screen is off, I don't receive a notification if I get an email, snapchat, whatsapp message, groupme message, or anything. So pretty much, it seems that after I put the phone down, it isn't syncing any of the applications. This happens only on Wifi. I've messed with my router but there was nothing i could do to fix it. I have a linksys router.
This is a big problem for me because I don't want to use up all the data on my phone by turning off the wifi.
The "Keep wifi on during sleep" is on always and has been like that forever. Does anyone else have this issue or know what to do? Thanks in advance.

[Q] Keep losing WiFi connectivity

I have an SGH-I337 that is running Cyanogenmod 11-20151112-SNAPSHOT-M12-jflte with baseband I337UCUAMDB, and I am experiencing some odd WiFi behavior.
The WiFi will be connected, showing in both the notification bar and the WiFi settings, the notification bar with show traffic (blinking up and down arrows), and yet apps won't be able to access the network. I can restart the WiFi via settings and this will usually restore app connectivity, though not permanently; eventually apps will lose connectivity again. Rinse; repeat.
At times I'll get annoyed at having the WiFi problems and turn WiFi off and use LTE. However, the WiFi eventually turns itself back on, often times exhibiting the connectivity issue that drove me to switch to LTE.
Another issue is that the WiFi will forget the settings for a given network. The WiFi app will simply show the network, not indicating that settings are saved, and I'll have to enter them again.
I haven't been able to establish a pattern to these issues, and it's driving me mad! Has anyone seen anything like this? Have any suggestions, besides taking a handgun to the phone?

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