Could not connect to any wifi network - OnePlus 3 Questions & Answers

Hi,
my Oneplus 3 does not connect to any wifi network anymore. After typing to correct wifi key the device says 'Connecting' and then 'Deactivated'. MAC-address is there.
What I have tried:
Reset
Tried Lineage OS
Reinstallation of orginal Oxygen OS
Flashed firmware+modem of Oxygen OS
Any suggestions would be appreciated!

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Unable to connect to WiFi AP with hidden SSIDs

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I'm having problems connecting to WiFi APs that have hidden APs. I've tried manually adding the network but it keeps showing them as out of range. Once I unhide the SSIDs, I'm able to connect successfully, but after hiding again, it shows them as out of range. I've tried 2 APs (TP-LINK and ASUS) and both have the same problem.
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I was installed linage os bt. While I was connect to any wifi network it's connect & disconnect
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Xiaomi Mi A2 lite Wifi HOTSPOT Tethering issues on OSX - WRONG PASSWORD

Hi all, I have a brand new Xiaomi Mi A2 Lite phone with Stock ANDROID one firmware.
Android Version: 9 pie
Security patch: 5 February 2019
I have just Unlocked bootloader, flashed TWRP and Magisk, but I'm running on stock firmware.
I have the following ISSUES:
ISSUE 1 - When tethering a wifi signal, all my mobiles devices can connect and navigate, except for my working device, a Mac running OSX 10.9.5.
When I try to connect the signal, I type the password and the system gives back INVALID PASSWORD, even if the password is correct.
I found HERE ( https://discussions.apple.com/thread/4580644 ) and here ( https://apple.stackexchange.com/que...ection-has-password-issue-with-my-macbook-pro ) that the problem is due to the fact that OSX misunderstand a 2.4 GHz signal with the 5 GHz.
I've double checked and the HotSpot Wifi is a 2.4 GHz signal.
Switching to 5GHz and than back on 2.4 GHz does not work
Rename the hotspot does not work
Changing the password does not work
Rebooting does not work
Adding manually the WiFi SSiD and password in OSX Network preference does not work.
I'm out of ideas, and the Macbook with OSX is my working device, so I need tethering on the go.
Didn't try with Bluetooth or USB tethering.
ISSUE 2 - I have 2 sims, when tethering from SIM 1, the devices that works with my hotspots are able to navigate witouth problems.
when moving the data from SIM 1 to SIM 2, the tethering does not send data, and i'm unable to navigate.
Any help and suggestion is really appreciated, i don't want to switch to LINEAGE due to the fact that I have just set up the stock rom with my personal apps
Any news or suggestion on how to solve those issues?
I was able to make it work with MAC OSX without WPA2 Personal password, leaving WiFi open.
The problem is that I work in a School, so there is an high risk of students to connect to my personal hotspot, how can I force to only be 1 device to be connected? It was possible with AOSP Kitkat, why is not possible with Pie?
Any Magisk or Xposed module?
I have the same issue with OS X 10.13.6.
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Connected, No Internet error on my Lenovo TAB 4 10 Plus, how can I fix this?

I have posted the same question, but it was not at Lineage OS Questions & Answers, so that is the reason that I make the exactly same thread here on the right section.
I have a Lenovo TAB 4 10 Plus, and it is running on Lineage OS 16(Android 9).
I use it a while but since 5 weeks, if I connect to my home WIFI network, it shows this error message: Connected, no internet
I have done this:
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- Resetting the Router
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Wifi connection problem

Hi all,
I have a mi 6 phone (sagit). I flashed Lineage 17.1 and root with magisk. When I connect a wifi, I get this error: no internet connection. Strangely, I have connection but some apps do not work with this error. I've tried to change network usage option to "treat as unmetered", and privacy option to "use device mac". But result is same. How I can solve this problem, it is very annoying. (I assume it would be related to router. Not all wifi's giving this error but I could not find a solution on router side as well.)
Best,
blasla said:
Hi all,
I have a mi 6 phone (sagit). I flashed Lineage 17.1 and root with magisk. When I connect a wifi, I get this error: no internet connection. Strangely, I have connection but some apps do not work with this error. I've tried to change network usage option to "treat as unmetered", and privacy option to "use device mac". But result is same. How I can solve this problem, it is very annoying. (I assume it would be related to router. Not all wifi's giving this error but I could not find a solution on router side as well.)
Best,
Click to expand...
Click to collapse
Sounds like you blocked Google captive portal.
kurtn said:
Sounds like you blocked Google captive portal.
Click to expand...
Click to collapse
How to unblock it? I did a clean reinstallation and same result.

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