Develop Bugs

[Q] Wifi doesn't work

Hi there,
Today I recognized that my wifi doesn't work. I can switch it on an there is also a massage that there is a wifi network available in the notification center. But if i open settings/wifi the phone writes no wifi networkes available.
My Z1c is rooted (KK .757) and locked bootloader.
Has anybody a idea how I can solve this problem?

mikk_11 said:
Hi there,
Today I recognized that my wifi doesn't work. I can switch it on an there is also a massage that there is a wifi network available in the notification center. But if i open settings/wifi the phone writes no wifi networkes available.
My Z1c is rooted (KK .757) and locked bootloader.
Has anybody a idea how I can solve this problem?
Click to expand...
Click to collapse
This happens to me sometimes, after a restart works for me. May be next update may solve this problem

I've already restarted 3 times but doesn't help.

You can try: 1. restart your router
and 2. delete the settings for your network in your Z1C and make a new registration.
Is the problem solved?
I think no.1 will solve the problem. What a router do you? Many routers can do a automatic restart after flashing DD-WRT or Open WRT. These firmwares are available for the most routers.
greetings

What do you mean with 2.??
I've already tried to restart my router. But I'm pretty sure that the problem isn't the router because I can connect with other devices to the router.

go to settings - WLan and tap long time on your network and delete it.
It does not matter, that other devices can connect to your router.
I had the same problem with a TP-Link router after few days running. A restart helps only.

Delete the network doesn't help too.
It does not matter, that other devices can connect to your router.
I had the same problem with a TP-Link router after few days running. A restart helps only.
Click to expand...
Click to collapse
Usually I find also the wifi networks of my neighbours. But now I don't find any wifi network.

mikk_11 said:
Delete the network doesn't help too.
Usually I find also the wifi networks of my neighbours. But now I don't find any wifi network.
Click to expand...
Click to collapse
For sure you have problem with your router since low cost routers is nothing than an s***t ! I had the same trouble with an low cost router until I come back with an good Dlink DSL2740B router 5 years ago, everything working flawlesly constantly ~5 years, no wifi isues! My sugestion to you is to buy an good home router! I have plan to bye this one http://www.dlink.com/us/en/home-solutions/connect/routers/dir-880l-ac1900-wifi-router which will work for sure perfectly next 5 years (probably more)!

I've solved the problem already. The problem wasn't the router.
I had to wipe DATA and then my WIFI worked again.
Then I tried to restore a backup what I've made befor but then wifi doesn't work any more.
So there was something buggy with my DATA..

[Q] Suddenly can't see my 2.4GHz wifi.

Hey all
I have a T-800 with IronRom on it. Everything was working fine for almost 2 months now. Starting yesterday, my tab is unable to find my 2.4GHz WiFi, but is still able to find/connect to my 5GHz WiFi or other 2.4GHz networks (public hotspots).
Other devices see the 2.4GHz network fine, and can connect to it. I've just rebooter the router and payed closed attention to what happened. Once the router is online, i can briefly see the 2.4GHz network, i tried to connect to it and my tablet asks for the wpa2 key. When i entered it (it's pretty long) i clicked connect, but the network was already listed "out of reach" by then.
Some more info:
I have rebooted all related devices
Tablet CAN connect to 5GHz network
Tablet CAN'T connect to 2.4GHz network (out of reach)
Other devices (laptop, phones) CAN connect to the 2.4GHz network
Tablet CAN connect to other 2.4GHz network
I have tried a Wifi Analyzer app, that also can't see the 2.4GHz network.
What could cause this or how could i diagnose/fix this issue? Any help greatly appreciated!
Thanks a bunch in advance!

Perhaps some program you've installed recently has made changes to the system or settings that's prohibiting connection?
You seemed to have established there is nothing wrong with your network, and even the device can use both bands...
I would backup, reset the device and see if its still an issue.

Itchiee said:
Perhaps some program you've installed recently has made changes to the system or settings that's prohibiting connection?
You seemed to have established there is nothing wrong with your network, and even the device can use both bands...
I would backup, reset the device and see if its still an issue.
Click to expand...
Click to collapse
Thanks for your reply! I have performed a reset and the problem persists. I have contacted Samsung support and they say it's a hardware issue and i should send it in.
The repairs are outsourced to Dynafix (can't post URL because I'm a new user). Any idea on how they handle rooted tablets with a custom OS? Should i tell them upfront?

You should get it as far back to stock as you can... ie - odin a stock rom.
If its indeed a hardware issue then it shouldn't matter but don't give them that reason.

I managed to fix the problem with the suggestion of a friend. My 2.4GHz connection's channel setting on the router was set to automatic. I assigned it a fixed channel and it immediately popped back into my available networks. Weird problem, but I'm glad i didn't send it in for repairs because they would've charged me for it.

Had the same problem and it was rom related. I changed the rom and coud enable auto channel again in my router...
Sent from my SM-T700 using xda premium

Oneplus 3 - Issues with 5GHz WiFi?

Hello,
I seem to be having an issue with connecting to my 802.11ac router (Apple's Time Capsule). In "Automatic" mode, it connects to my SSID via 2.4GHz only. When I go to Settings > Wi-Fi > Advanced and choose Wi-Fi Frequency band as 5Ghz it finds 0 networks in the area.
FYI - I'm on 3.1.3 OxygenOS.
Is anyone experiencing similar issues?
Best,
Mash
Edit: To be clear, I have several devices including my laptop that are connected to the 5Ghz band. I've also used a WiFi scanner in my old S6 Edge to verify that there are SSIDs broadcasting in the 5Ghz band.

I use 5 GHz network at home and it works fine with my op3.
Wysłane ze zmywarki

using 5Ghz on Fritzbox, i also use diffrent ssid names for 2,4 and 5ghz and also different passwords

Thanks guys. Are both of you on 3.1.3? I'm trying to isolate the issue here...

mash2u said:
Hello,
I seem to be having an issue with connecting to my 802.11ac router (Apple's Time Capsule). In "Automatic" mode, it connects to my SSID via 2.4GHz only. When I go to Settings > Wi-Fi > Advanced and choose Wi-Fi Frequency band as 5Ghz it finds 0 networks in the area.
FYI - I'm on 3.1.3 OxygenOS.
Is anyone experiencing similar issues?
Best,
Mash
Edit: To be clear, I have several devices including my laptop that are connected to the 5Ghz band. I've also used a WiFi scanner in my old S6 Edge to verify that there are SSIDs broadcasting in the 5Ghz band.
Click to expand...
Click to collapse
Got a 3TB time capsule here. OOS 3.1.3 - on automatic, it only connects to 2G despite having full 5G signal, however if i switch it to 5G only, it finds both main and guest networks in that band and connects fine Try re-flashing stock rom

Thanks - I'll try and do a nandroid backup and reflash to see if that fixes the issue.

mash2u said:
Thanks guys. Are both of you on 3.1.3? I'm trying to isolate the issue here...
Click to expand...
Click to collapse
3.1.3 stock, not rooted

Check what frequency and channel width your 5ghz band is set to, one time I changed my 2.4ghz and my ps4 couldn't detect it til I changed back.

Just tried 5Ghz without issue using channel widths 20Mhz, 40Mhz, and 80Mhz.

TritonB7 said:
Just tried 5Ghz without issue using channel widths 20Mhz, 40Mhz, and 80Mhz.
Click to expand...
Click to collapse
Thanks guys. I wonder if I've got a lemon.
I've just reflashed 3.1.3 and even then can't find or detect ANY 5GHz SSIDs. This is so frustrating.
I guess a call to support is the way forward.

mash2u said:
Thanks guys. I wonder if I've got a lemon.
I've just reflashed 3.1.3 and even then can't find or detect ANY 5GHz SSIDs. This is so frustrating.
I guess a call to support is the way forward.
Click to expand...
Click to collapse
Check if you are able to connect to a different 5GHz Network. It _might_ be an issue with the router itself.
Mine OP3 connects to 2.4 and 5 without any problems (TP-Link Archer C7).

mash2u said:
Thanks guys. Are both of you on 3.1.3? I'm trying to isolate the issue here...
Click to expand...
Click to collapse
I'm on non rooted 3.1.2.

It works fine for me on 3.1.2 and 3.1.3
Wysłane ze zmywarki

Just wanted to report - no issues with 5GHz networks whatsoever, used 3.2.0 and 3.2.1 now.

Try to change channel to 40 and try had this issue whit some phone
From North Pole

I am facing the same issue my phone can scan 5GHz wifi but it does not connect and error shows wifi connection failure.
I am on 3.2.1 and my router is ASUS WRT68u
Please do share if any solution is found!

m_usmanayub said:
I am facing the same issue my phone can scan 5GHz wifi but it does not connect and error shows wifi connection failure.
I am on 3.2.1 and my router is ASUS WRT68u
Please do share if any solution is found!
Click to expand...
Click to collapse
Channel 36 for 5ghz is confirmed working for me on latest update, rooted etc

for me connect to 5 ghz but in seconds turn automatically to 2.4 ghz
update to 3.2.1 and the problem still there

ALUCARD4DEAD said:
for me connect to 5 ghz but in seconds turn automatically to 2.4 ghz
update to 3.2.1 and the problem still there
Click to expand...
Click to collapse
Try going into advanced wifi settings and setting your network mode to 5ghz only. Inconvenient but will do the job.

manor7777 said:
Channel 36 for 5ghz is confirmed working for me on latest update, rooted etc
Click to expand...
Click to collapse
does not work here.... tested on both rooted and unrooted

A50 WiFi problem

Hi,
My Samsung A50 is a great phone but has a annoying WiFi problem I'd like to solve.
Whenever I connect a WiFi capable of 5Ghz, at some point it starts to switch to 2.4 GHz constantly and back to 5Ghz, making the WiFi unusable.
This happens even if I am close to the router.
I have already reseted the phone and cleared cache.
How may I solve this (besides router solutions like creating two seperate SSIDs as I use this smartphone at an enterprise level)?

can you change de band manually??

kjamez said:
can you change de band manually??
Click to expand...
Click to collapse
No I can't but I'd love to

Question 5ghz WiFi Issue

I bought a Poco F4 (global version, xiaomi.eu 14.0.5.0) about one month ago, I haven't had any issues with it whatsoever, save for the fact that it suddenly won't detect my 5ghz WiFi networks (my main router + a repeater) - and I'm not even sure if this is an issue with the phone itself.
I'm coming from a Samsung Galaxy S20 FE, which was known to have this issue, but to have this happen on 2 different phones is really weird. If I recall correctly this issue started to affect me after I changed my ISP.
The only ways I have to detect the networks again is to go the debug mode and use the WiFi Sniffer Test Tool or reboot the phone, which was more or less the same thing I had to do on the S20 FE (I had to go turn on airplane mode try updating the firmware via debug mode).
What I've tried so far to solve this issue:
1. Changing the channel of the 5ghz WiFi
2. Changing the bandwith from 20/40/80 to 20/40
3. Setting "Use Device Mac" on the phone's network settings.
4. Turning off WiFi Scan Throttle
5. Changing the bandwith to 20
All of the above methods, save for the last one, did not work. And while it does work, it limits the speed of my internet to bellow 100mbps.
The issue is not related to the WiFi coverage as well since it only happened when I'm on my own room, which is where my router is located.
I don't know if I can detect other networks apart from my own since even when they 5ghz detection is working I can't find any of my neighbors' networks. I'm unable to create a 5ghz hotspot on my S20 FE or on my old Redmi Note 9S for some reason.
I'm at a loss on what to do, it happens on both stock and xiaomi.eu, at least and at most once per day.
If anyone else is facing the same issue or has any suggestion on what I should try next please let me know.
Thanks in advance.

I have no problems with 5G Wifi on xiaomi.eu rom
All the time 300Mbit/s
Buy Wifi6 router

This doesn't look like a problem with the phone (s).
Try connecting to another router to see if you have the same problem.

0kti said:
I have no problems with 5G Wifi on xiaomi.eu rom
All the time 300Mbit/s
Buy Wifi6 router
Click to expand...
Click to collapse
Are they on any specific channel/bandwith?
Both of mine are WiFi 5 though.
Thanks for the reply.
TheMystic said:
This doesn't look like a problem with the phone (s).
Try connecting to another router to see if you have the same problem.
Click to expand...
Click to collapse
Thank you for your input. I'll try to turn on my old router when the issue happens again. I find it odd that the issue affects both my main router and the one I use as a repeater, but everytime I made any slight change on the main router, the other one's signal almost immediately disappears to apply the changes as well, so it's probably that.

mode: 802.11a/n/ac/ax
channel: 48
bandwith :80MHz
I'm using Tenda TX3 Wifi6 router.
No issues at all. Great internet speed on wifi connection.

furquim97 said:
Are they on any specific channel/bandwith?
Both of mine are WiFi 5 though.
Thanks for the reply.
Thank you for your input. I'll try to turn on my old router when the issue happens again. I find it odd that the issue affects both my main router and the one I use as a repeater, but everytime I made any slight change on the main router, the other one's signal almost immediately disappears to apply the changes as well, so it's probably that.
Click to expand...
Click to collapse
The problem is indeed with your router + repeater setup. Your phones are fine.

0kti said:
mode: 802.11a/n/ac/ax
channel: 48
bandwith :80MHz
I'm using Tenda TX3 Wifi6 router.
No issues at all. Great internet speed on wifi connection.
Click to expand...
Click to collapse
Thank you! I'm almost certain that the issue is that the bandwith isn't fixed at 80mhz, it's 20/40/80mhz, and when I had the bandwith set to 20mhz I didn't had the issue.
TheMystic said:
The problem is indeed with your router + repeater setup. Your phones are fine.
Click to expand...
Click to collapse
Thank you! It's probably related to the bandwith. I was able to turn on an old router and my phone was able to detect the 5ghz network after the bug happened and my router + repeater signal was missing.

Have you tried resetting your router to the default settings? Or maybe set a specific IP address on your phone in your home network? As said above, it is a setup issue of your network most probably..