I am asking for help because my WiFi acts really weird. It feels like it's hurting my brain. Here is how it works: I have 2 routers downstairs and upstairs that are connected to each other. Then I made 2 WiFi networks, let's call them Net1 and Net2. Only one of those two networks (Net1 or Net2) actually works on my phone. But Net1 only lets certain websites come in, like Google and YouTube. Net2 is different because it connects to every single website. My smart TV (which I think is a Samsung) cannot connect to the internet using either network nor can it use the ethernet cable that comes from the router. It's also broken for my Xbox and PC upstairs, but it still connects on the phone. Sometimes I say "the ethernet cable isn't working," but when I check, it only shows up as LAN and won't even talk to the internet. That is confusing because my PC downstairs works perfectly fine, even though it is connected directly to the main router. The real puzzle is why WiFi works on my phone but not on my other devices? Why does Net1 only let Google and YouTube through but blocks things like Twitter and Reddit while Net2 lets everything in? Also, I forgot to mention that there are two ethernet cables: one for the PC downstairs which works great, and another one for my smart TV. This TV also has its own device connected via an ethernet cable, so it seems like something is wrong with those cables too. I am sorry if my words are confusing; I do not usually handle WiFi or router stuff. The person who does that job right now is in India.
After I did a hard reset on my router, net1 is still not working for my Xbox.
You have way too much work to do here and you really need a clear picture of your whole network. We need to see where the modem, router(s), and other stuff like Xboxes are connected. Do they live in Net1 or Net2? You also need to know what models those devices are. Is there admin access to the routers? If not, you can't do much without help from someone who knows how (someone currently based in India). It's very easy for us to make things worse if we reset your gear yourself. For instance, maybe an Xbox won't work anymore because of this. In a setup with separate networks like yours where the second router might be acting as an Access Point, everything gets messy fast. The routers are now all back to factory settings, which means any connected devices—like that Xbox—will probably need to be set up again to get their network connections working. Maybe they need to go through different steps depending on how the original admin person configured things before you reset them. You should ask for help from that person who knows what happened.
I have admin access to my home router. I think all of these devices connect to it directly. The main one is a Hotbox (that's what I know for sure), and the rest are Xiaomi routers. What settings need to be set up so everything connects again? Something like changing the DNS server?
Setting up a home network is usually easy, but it gets harder with modems, many routers, lots of devices, and the need for two separate networks. Sometimes you have to start from scratch because figuring out the old setup is too hard. This is especially true if you don't know what was there before. Everything needs to be physically connected correctly, including anything that must connect to something else (like an Access Point) before it can work without wires. You need the manuals for your modem and routers (like a Xiaomi router), plus any other gear you use. The "HOTBOX" section? You'll need specific guides for each model. It will take some time, but you have to plan how everything is going to be put together again. You'll need a clear diagram showing exactly how all devices connect or are supposed to work. Then, once you've planned it out with the main router in mind, remember those important details like the gateway address and any special IP settings. After you're sure your plan makes sense, send that idea to the admin person back home in India. Only they can tell you if your plan is right for your situation or help you figure out how to get everything working again.