Extreme reduction in hotspot and bluetooth after plugging in the motherboard. - Xiaomi Mi 8 Questions & Answers

I may have made wrong spellings because I used the translation. I wanted to look at the motherboard because the wifi was constantly disconnected. I disassembled it, I replaced the thermal paste. All the cables were plugged in. But after this process, the hotspot and bluetooth became very weak. Although there was a wifi problem before, the hotspot and bluetooth were working normally. Even if I put the phone next to it, it takes 2 bars. where could i go wrong?

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[Q] Need new wifi antenna or new coax connector

Ok, so i took my N1 apart to replace the microusb port. After reassembling it, wifi has gone almost completely, except when i'm really close to the router. I've checked all the connectors so think it has to be the aerial foil or the coax, any ideas?
Everything else seems to be working fine.
The coax plugs are w.fl type but i can't find any info on the WIFI antenna.
Me too. I have no bluetooth or wifi. Just says 'Error' when trying to start. Obviously something wasn't put back right.
Suffering from the same issue on N1, after the assembly, wifi doesn't work and just shows error. I've tried different kernels and bcm4329.ko 's didn't help.
And i don't remember if i didn't assemble it right. Doubled checked to see if everything was in place. It is.
causeway said:
Ok, so i took my N1 apart to replace the microusb port. After reassembling it, wifi has gone almost completely, except when i'm really close to the router. I've checked all the connectors so think it has to be the aerial foil or the coax, any ideas?
Everything else seems to be working fine.
The coax plugs are w.fl type but i can't find any info on the WIFI antenna.
Click to expand...
Click to collapse
did anyone ever fix this problem?
I have a few of these parts available. PM me if you need anything

[Q] Wi-Fi Problem.

Hi All,
A couple of weeks ago while repairing the cracked screen of my HTC One I broke the Wi-Fi/Bluetooth cable running across the phone. I ordered a new one and used the phone without it (With very poor Wi-Fi range) until the new one arrived. The antenna arrived yesterday and I installed it in the phone, however, upon booting the phone I have found that the range is still very poor.
Someone please help!!!
Thanks,
NoBones
NoBones said:
Hi All,
A couple of weeks ago while repairing the cracked screen of my HTC One I broke the Wi-Fi/Bluetooth cable running across the phone. I ordered a new one and used the phone without it (With very poor Wi-Fi range) until the new one arrived. The antenna arrived yesterday and I installed it in the phone, however, upon booting the phone I have found that the range is still very poor.
Someone please help!!!
Thanks,
NoBones
Click to expand...
Click to collapse
You might have damaged your wifi/bluetooth transmitter/receiver by using it without the antenna connected. Transmitters are designed to work with antennas that have calculated length and impedance based on the wavelength (frequency) used. If not using the right antenna or no antenna, most of the power is reflected back to the Tx/Rx circuitry and can cause irreversible damage.
Never use a device without its antenna or with the wrong antenna, this apply for all devices that have transmitter circuits. (WiFi routers, phones, CB radios, etc etc).
I will not explain in details how it works, if you want to read more about this, search VSWR in google.
Wi-Fi Problem
alray said:
You might have damaged your wifi/bluetooth transmitter/receiver by using it without the antenna connected. Transmitters are designed to work with antennas that have calculated length and impedance based on the wavelength (frequency) used. If not using the right antenna or no antenna, most of the power is reflected back to the Tx/Rx circuitry and can cause irreversible damage.
Never use a device without its antenna or with the wrong antenna, this apply for all devices that have transmitter circuits. (WiFi routers, phones, CB radios, etc etc).
I will not explain in details how it works, if you want to read more about this, search VSWR in google.
Click to expand...
Click to collapse
So how can I get my phone operational again???
I love my HTC :'-(
Probably need a mother board replacement if your issue is caused by what I said

Headset Not Supported

I keep getting a "Headset Not Supported" pop-up error when I connect the same pair of headphones that have worked perfectly until now.
I read another post that recommended reinstalling Smart Connect. It wasn't even on my phone, so I installed that and now my headphones work 1 in every 50 to 100 times I plug them in. On the successful attempts, Smart Connect recognizes the headphones being plugged in.
These headphones have the standard two connector lines on the plug, which I believe denote a stereo connection. I did find a work around by using an 1/8" to 1/8" adapter; the male plug has 3 connection lines. I'm not sure if the phone randomly decided that it wants that third line or what, but I'd really like to figure out what is going on.
Has anyone run into this and found an actual fix? I don't like having to rely on that adapter piece, as it's just another thing I have to carry around with me. It's also small n easy to lose, especially when drunk... and yes, I already lost it!
Thanks.

Intermittent USB connections.

Trying to find out if there are any bad USB port connections complaints here, but it looks like this problem is not very common, that's good - hope that Google will quickly take care of repairs. It started, suddenly, cutting out while connected to PC, it goes on and off generating in a very short time a dozen or so warnings on the PC monitor:" The device has either stopped responding or has been disconnected" The cable isn't the culprit, I tried 3 others w/ the same results plus, my other phone connection works flawlessly.

Question Redmi Note 10 5G screen replacement.

Hi all. Somebody gave me a phone with a really smashed up screen and said I could have it if I could save the date. Anyway, I swapped the screen out but haven't glued the phone back together again yet. Everything appears fine but I notice there's no sound and the WiFi/network signal is awful and the best I can get is "can't provide internet" even when I stand next to the router.
My question is are these functions dependent on the back panel being assembled again? The sound probably is but shouldn't the WiFi be OK? The white and grey antenna cables look like they are fine and in place.
Thanks!
I don't know how this model is built exactly. but in my old smartphone (redmi note 4), the wifi/bluetooth board was separate, along with the usb port, and connected to the main board by wires and, if i'm not mistaken, an antenna. I had to replace this with a new one because it was faulty (poor BT/Wi-fi signal and broken USB Port). check if these cables are ok and if this board (if any) were not damaged along with the screen
Virtuazada said:
I don't know how this model is built exactly. but in my old smartphone (redmi note 4), the wifi/bluetooth board was separate, along with the usb port, and connected to the main board by wires and, if i'm not mistaken, an antenna. I had to replace this with a new one because it was faulty (poor BT/Wi-fi signal and broken USB Port). check if these cables are ok and if this board (if any) were not damaged along with the screen
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Thanks! I did some more tests today and if I literally touch the phone off the router and use the regular (not 5G) band I can get the internet on the phone so I think it's a problem of degree and not something totally broken. The antennas cables definitely appear 100% and I've no idea how they could have been affected by anything I've done but that's something I'll keep in mind before I glue the back on again.
OK so I've put the frame together and everything works great! Except the 5Ghz Wifi. Connects to router but no internet. The 2.4GhZ works great, as does the phone network. Sound is great too. In fact the last issue I have is that the selfie cam is VERY blurry. Maybe I dirtied the glass during the screen change? Anyway, looks easy enough to lift out the selfie cam and clean in there, should be OK.
The back fits on very snug, should be fine to glue once that's done.
100% fixed, yay!
And fer gawds sake I scrape some sort of film covering off the inside of the glass through the gap where the selfie cam goes... and then when I assembled it all again the screen cracked!
Cursed! It's one hairline all across it but it still works fine now otherwise and I'm leaving it like this!
DannySolo said:
OK so I've put the frame together and everything works great! Except the 5Ghz Wifi. Connects to router but no internet. The 2.4GhZ works great, as does the phone network. Sound is great too. In fact the last issue I have is that the selfie cam is VERY blurry. Maybe I dirtied the glass during the screen change? Anyway, looks easy enough to lift out the selfie cam and clean in there, should be OK.
The back fits on very snug, should be fine to glue once that's done.
100% fixed, yay!
Click to expand...
Click to collapse
In this case, could be the wireless router. My phone cant connect to 80mhz bands on 5Ghz wi-fi, but in 20 or 40mhz It connects successfully. Did you checked this?
Virtuazada said:
In this case, could be the wireless router. My phone cant connect to 80mhz bands on 5Ghz wi-fi, but in 20 or 40mhz It connects successfully. Did you checked this?
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Click to collapse
It connects directly to my 2.4Ghz router but not to either 5Ghz or 2.4Ghz bands coming out of my range extender. Weird. Maybe there's some settings in the extender I can change.

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