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[Q] HTC Sensation WiFi Error

Hi,
I am new to the forum and appreciate your help
I did a OTA update to 1.35.707.1 after which i cannot turn on WiFi. It tries to turn on after which it indicates error.
Please suggest a solution for this......is it possible to roll back to the previous software version of 1.28

Try a factory reset. Go to settings, SD & Phone storage and click on Factory data reset. Keep in mind this will erase everything on your phone.

Tried a factory reset...still not successful.
Is it possible to downgrade ROM to version 1.28.....

I experienced this exact same problem today when helping a customer with their HTC sensation. I tried the Factory Data Reset as well and still got the same error. The only solution I found was to tell the customer to contact customer support to get a replacement unit. I'm not sure if it is a software issue of if there is some issue with the wifi antenna in the device itself.

Damn, I have the same issue, how long does the warrenty cover the unit for? Can you just walk into the store for a replacement?

also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error

vladvertigo said:
also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error
Click to expand...
Click to collapse
Bump thread, same issue here, turn on wifi, says error. Very sad

Same issue here, started to show the error just like that. The night before was working fine and the next day could not turn wifi on.
I did a superwipe and installed mike's Revolution HD 3.6.5 but still same issue.
Hope smb will find where is coming from and really hope is not a hardware issue.

bk_25 said:
Same issue here, started to show the error just like that. The night before was working fine and the next day could not turn wifi on.
I did a superwipe and installed mike's Revolution HD 3.6.5 but still same issue.
Hope smb will find where is coming from and really hope is not a hardware issue.
Click to expand...
Click to collapse
I went back to stock and sent back as a damaged phone

Master Loon said:
I went back to stock and sent back as a damaged phone
Click to expand...
Click to collapse
You are lucky you can return it.
I purchased the phone through E-bay, seller in US and I am in europe, no chance for me to return it
Have been experimenting with ROM's and after a superwipe, clear dalvik, installed [ROM]LeeDROiD Sensational V3.1.0 [KERNEL] LeeDrOiD V3.3.0 | 19th Sept | FAST | STABLE , as i read somewhere on the forum that has ROM close to stock and have been cases it fixed the issue (http://forum.xda-developers.com/showpost.php?p=16125179&postcount=3)
but did not help me, the wi-fi still doesnt turn on at all.
Will update if i find anything or get any results.

Same issue.
thread : http://forum.xda-developers.com/showthread.php?t=1302347
That's four threads with the same issue.
someone in the know must see these threads.
HELP.

vladvertigo said:
also have one phone here with 1.35.707.1 with same problem trying turn on wifi - Error
Click to expand...
Click to collapse
I have a fix for my problem. i had another Sensation for repair here for some other hardware issue, so i was playing around with two phones. after all this i figured out the problem.
this flex inside was giving wifi error
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later on did small research, it has a BCM4329EKUBG chip on it which responds for wifi, bt and fm, its not cheap solution to replace a flex, but for somebody this could be only way
Reheating this chip with hot-air fan (it was like 290-300 degrees) helped me, if you want to try this dont blame me if you mess it up !!

vladvertigo said:
I have a fix for my problem. i had another Sensation for repair here for some other hardware issue, so i was playing around with two phones. after all this i figured out the problem.
this flex inside was giving wifi error
later on did small research, it has a BCM4329EKUBG chip on it which responds for wifi, bt and fm, its not cheap solution to replace a flex, but for somebody this could be only way
Reheating this chip with hot-air fan (it was like 290-300 degrees) helped me, if you want to try this dont blame me if you mess it up !!
Click to expand...
Click to collapse
Makes sense, i did once cook a graphics card in an oven on 220 degrees for 20 mins and it brought it back from the dead, still working today, got a video of it somewhere.
So specifically, what did you do please? I'm in a place where i have lots of spare parts lying around from pretty much every phone you can think of, so what do i need please?
Many thanks for having the balls to even contemplate trying this.

dladz said:
Makes sense, i did once cook a graphics card in an oven on 220 degrees for 20 mins and it brought it back from the dead, still working today, got a video of it somewhere.
So specifically, what did you do please? I'm in a place where i have lots of spare parts lying around from pretty much every phone you can think of, so what do i need please?
Many thanks for having the balls to even contemplate trying this.
Click to expand...
Click to collapse
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk

vladvertigo said:
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk
Click to expand...
Click to collapse
Thanks for taking the time to reply and lol @ the paint writing, cheers m8, your a legend, will give it a whirl if all else fails, why not

vladvertigo said:
first of all try a software repairs, cause i see a lot of people have similar problem after playing around with different roms
what i did, just disassemble the phone, take out that big flex cable. disconnect all cameras and flex cables you can (unless you want a blurry camera)
on a back of flex there is metal slab covering chip, took it out. after that i heat chip area for minute or so with my soldering heating gun, wait until it cools and install in the phone, after doing this operations it started working.
do it on your own risk
Click to expand...
Click to collapse
Alright! Now where is my soldering heating gun, I will have to try this one. Reverting to stock everything first in case I mess things up

Any luck??
Did you get it to work this way???
I have the same problem. I try installing ICS on the phone thinking it was a software error. I still have no wifi connection. Try *#*#4636#*#* and the status on the Wifi is Unknown (unintialized on Supplicant state)
Did any of you know where can I get this board (where the BCM4329EKUBG chip is located)?

Sent it back for RMA, changed both lcd screen (a single piece of dust) and rigid flex. Comes by air mail tonight!
Sent from my Sony Xperia Arc S LT18i,
using XDA Premium on Arconium 3c, Android 4.0.4.

Thnx a lot I fixed by heating and I send my 1st post from this device I just repaired by this solution after long search thnx alot
Sent from my HTC Sensation Z710e using xda premium

THANK YOU SO MUCH vladvertigo (caps intended). I tried all the software fixes I could find, even went back to bone stock, S-ON and everything, so this was my last resort before buying a new flex ribbon assembly. I don't have a warranty because I bought the phone on Craigslist.
Anyway, I can confirm that using the heat gun for a minute worked. I made a heat shield out of an aluminum can, with a small square cut in it. Held it right above the bare chip, and the gun right above that. I disconnected the main camera, but not the FFC. Pretty sure I borked it in the process but it's no matter; I'd rather have working WiFi than the FFC. Which I do now, thanks to you! Woo!

The thing on every back phone

It may be a silly question but i always wondered what is this thing on every back of the phone?
I belived it's some kind of antenna connector but then why on my old samsung is under my battery?
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Anyone?

AW: The thing on every back phone
I think thats only on Samsung phones. On Htc Evo 3d it isn't...

Never seen it in my life
I've an s3 and it doesn't have this
Sent from my GT-I9300 using xda premium

It's also there on my Samsung omnia w. But not there on any of my HTC's or LG's so think it's only there on older Samsung phones
Sent from my One V using xda premium

No, i've seen it on many phones until now, on every Sony Ericsson k series, w series, etc., Samsung, Nokia.

Not being captain obvious here, but maybe it's a screw?
Sent from my SGH-T999 using xda app-developers app

Those are for an external antenna. Every phone I have ever seen has one but sometimes they are hidden under a sticker or rubber plug. I don't exactly know what the practical use for one is though. I can't imagine anyone walking around with a wire sticking out of the back of the phone and an external antenna duct taped to the phone.
Sent from my XT894 using Tapatalk 2

If you stucked on a desert island
Sent from my GT-I9100G using xda app-developers app

I had one my Lg Vu, never really knew what it was, but I just assumed that it was something that the phone company used for diagnostics or something. The external antenna makes more sense though. I wonder if i could buy the equipment to use an external antenna on it. The coverage at my cottage is sporadic at the best, and I'm not there often enough to justify paying for a land line.

It's the antenna
Sent from my Galaxy SIII on Verizon Wireless using Tapatalk

You sure about that?
Sent from my GT-I9000 using xda premium

The S2 skyrocket has two of them. And yes I do believe they are your antennas
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

I am really curious about this, and i never taught that so many people have no idea what is that.

Its a antenna you can put a peice of wire in it and you get better signal lol
Sent from my SCH-I500 using Tapatalk 2

That's even more curious, if you saw the first picture...how am i supposed to put an antenna under the battery?

its on Samsung phone. I think

zweideutigkeit said:
That's even more curious, if you saw the first picture...how am i supposed to put an antenna under the battery?
Click to expand...
Click to collapse
It's a connector (type FME) for an external antenna and is designed for use with a "car kit" that is permanently mounted in a car or some other fixed location. The reason it can be under the battery is that you take the battery out and the car kit base unit supplies power to the phone either from the car's power system or, if you've set it up at a fixed location, eg., at gator365's cottage, you would have a mains operated power supply for it.
It used to be a common feature on cell phones, but you don't see it so often now days.
I would not recommend just connecting a piece of wire as suggested by bbrad - it might be ok on receive, but an unmatched random wire antenna is not going to do the output stage any favours when transmitting and is likely to result in a dead phone - a high VSWR is bad for any transmitter.

Mike_NZ said:
It's a connector (type FME) for an external antenna and is designed for use with a "car kit" that is permanently mounted in a car or some other fixed location. The reason it can be under the battery is that you take the battery out and the car kit base unit supplies power to the phone either from the car's power system or, if you've set it up at a fixed location, eg., at gator365's cottage, you would have a mains operated power supply for it.
It used to be a common feature on cell phones, but you don't see it so often now days.
I would not recommend just connecting a piece of wire as suggested by bbrad - it might be ok on receive, but an unmatched random wire antenna is not going to do the output stage any favours when transmitting and is likely to result in a dead phone - a high VSWR is bad for any transmitter.
Click to expand...
Click to collapse
I didn't recommend it I just said you could do it and receive better signal which you can and I didn't recommend just "sticking an price of wire in there
Sent from my SCH-I500 using Tapatalk 2

Tempted to grab an old phone and stick a piece of wire in there to see what happens to signal quality. Now I just have to find an old phone!

Simple Fix for your GPS - Samsung Galaxy S III

Hi,
I have a simple GPS fix that worked for me. After posting and sharing in other forums this fix has also worked for many others who were frustrated with their GPS' not working, not locking onto satellites, and their phones acting erratically while navigating. Although this method seems too easy to be true, trust me it works and many people have confirmed that this method worked for them too and are now happy that their phone has a functional GPS and in some cases improved call quality.
I as well as many others performed many of the other fixes such as flashing back to stock, performing numerous battery pulls, using aGPS patches, making numerous edits to the gps.conf file, reprovisioning our phones, checking different ROMs, uninstalling/reinstalling Google Maps, clearing data for Google Maps and Google Service Framework, and so on. So before you do all of that please give my method a try.
I discovered this simple fix when I was trying to perform one of the other GPS fix procedures. The procedure required me to pull my battery. I noticed that when I removed my back cover the back frame that has all the screws (10 total) was slightly loose on the left side. Once I tightened them all my GPS worked immediately! Like I said, this method has been tested by many people and most of them report great success just by tightening their screws. If this method works for you you'll also notice that in addition to getting faster locks your navigation will work and won't drop your GPS signal.
Like I said it may not work for everyone but I would recommend that if you have a Samsung Galaxy S III definitely check the back frame of your phone and make sure you tighten the screws and make sure everything is secure. You too should now be able to achieve GPS locks consistently.
I hope this helps. If it does, as it has many others, please click thanks.
Cheers,
Syintiphic

Re: Easy Simple Fix for your GPS on your Samung Galaxy S III
The fix worked for me.. Night and day difference in getting satellite locks after tightening the screws..
Edit: In case anyone wants to know my theory behind why it works..
http://forum.xda-developers.com/showthread.php?p=39570338
Edit2: If you find the screwdriver fix doesn't work for you, or you find yourself tightening screws all the time, you can try this simple mod..
http://forum.xda-developers.com/showthread.php?p=44725977
Sent from my Commodore 64..
READY.
load"*", 8,1

Re: Easy Simple Fix for your GPS on your Samung Galaxy S III
I was skeptical as most would be about this fix. Boy was I a doof for believing that. This made 2 SGS3's (wife and mine) Gps go from inconsistent frustration to pure perfection. Cheers OP and thanks for sharing!
Sent from my Nexus 7 using xda premium

Re: Easy Simple Fix for your GPS on your Samung Galaxy S III
It works People!!!!! Believe it! Thanks again for sharing this!
Sent from my SCH-I535 using Tapatalk 2

Re: Easy Simple Fix for your GPS on your Samung Galaxy S III
I don't have any issues yet but I have this bookmarked in case I ever do. Thanks.
Sent from my SCH-I535 using xda app-developers app

I was pulling my hair over this issue. I replaced the phone with another one through T-Mobile for $20 and it had the SAME PROBLEM! All I ever did was flash the root injected version of the latest stock firmware. No upgrades to a 4.2.x rom. I tried reverting to the 4.0.4 rom. I tried a different gps.conf file. I was just about to do another warranty replacement when I found this thread. I almost wasn't going to attempt it because I thought it was a placebo. BOY WAS I WRONG! This fixed my phone. I'm still in shock!
EDIT: Well, I also discovered one more thing that was causing me grief with GPS. My wife's case! The case was interfering with the signal.
http://imgur.com/r7KPygA

Definitely works.... Instantly. I was standing outside of my house, with 0 locked out of 23 found (using GPS status), tightened screws (with GPS status still running) turned phone around and was locked onto 13/23.
My GPS stopped working about a month ago to the point that I could only get 1 or 2 locks wherever I was at. Thank you so much for posting such a simple fix.
Sent from my SCH-I535 using xda app-developers app

Worked for me!
I have been battling this GPS issue since I got the phone, and it has been very annoying since September - November. But it really hit me this week traveling 300 miles out of state when using Navigation, I would randomly fly off the highway and into the streets with the navigation program throwing a fit about where to turn. It just couldn't hold a solid lock for anything. Luckily I had my Nexus 7 packed with me, and it's GPS is always spot on.
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But after I saw a random post a few days ago about tightening the screws, I was at first skeptical, and had to wait until I was back home to get to my small screwdriver, but once I tightened all 10 screws, viola! It worked instantly! :laugh:
I now get a lock within a few seconds, and even indoors. Saved myself a trip to VZW too. Thanks guys!

Thanks! Sounds crazy but seems like multiple people got it to work.

wow
For MONTHS I've been dealing with BAD GPS. Never less then 35feet lock with all satellites in Yellow (mediocre reception)
I just did this, and most of my screws seemed like they were pretty tight already but i found the perfect philips head bit and really tightened everything max. Went outside and ran same test. 10 feet accuracy lock with majority of satellites in GREEN.
WHAT SORCERY IS THIS!??? Wow Samsung, im a bit disappointed
BUT grateful for OP
thanks!

Re-tighten?
I posted in another thread that this helped my gps lock significantly. I was getting around 10/21 locks with fluctuating accuracy, but after tightening the screws, I got 21/21 lock at 9 feet accuracy.
However, for me, it seems like I have to loosen and retighten the screws every 2-3 days because I notice my gps getting worse. But as soon as I retighten them, it's back to being great.
Does anyone else have to keep retightening the screws?

dmudd said:
I posted in another thread that this helped my gps lock significantly. I was getting around 10/21 locks with fluctuating accuracy, but after tightening the screws, I got 21/21 lock at 9 feet accuracy.
However, for me, it seems like I have to loosen and retighten the screws every 2-3 days because I notice my gps getting worse. But as soon as I retighten them, it's back to being great.
Does anyone else have to keep retightening the screws?
Click to expand...
Click to collapse
Not yet on 2 GS3's. Hope I don't have to.
I did pose the question in another thread where this threads talked about beginning began : wonder what is happening when we tighten these screws....
Sent from my Nexus 7 using xda premium

Well here is my take on what I think the problem is and why the screw fix works.. Understand I'm not making any assertions that this is the cause or that I know what the hell I'm talking about..
The back of the case (not the battery cover) appears to have an antenna.. This area has a copper contact point which sits in the area where the GPS of the phone is located.. If this part of the phone is loose, it doesn't make a solid contact with what I believe is the GPS antenna..
Sent from my Commodore 64..
READY.
load"*", 8,1

Thanks Hypnosis for your insight. Makes sense to me! Appreciate you posting this
Sent from my Nexus 7 using xda premium

Thanks Hypnosis for sharing, this makes sense to me too.
Sent from my SCH-I535 using xda app-developers app

Amazing. I saw this link in another thread. Intermittantly I have decent GPS with some serious issues where it won't work or doesn't work well. So last night right before I went to be I tried it in our basement. Normally I don't see more than 1 or 2 satellites when in the basement but last night I got lock on 13/18 in 20 seconds or less repeatedly. I checked my wife's s3 against mine as hers is usually better but it was still only getting 3-4 and no lock. So I quickly tried the same fix and again her phone could suddenly see more sats and got lock.
this was also an issue on the fascinate and some of the original galaxy's iirc.

Well thank you very much sir/madam! This worked like a charm!!!!
Sent from my SGH-T999 using xda app-developers app

syintiphic said:
Hi,
I have a simple GPS fix that worked for me. After posting and sharing in other forums this fix has also worked for many others who were frustrated with their GPS' not working, not locking onto satellites, and their phones acting erratically while navigating. Although this method seems too easy to be true, trust me it works and many people have confirmed that this method worked for them too and are now happy that their phone has a functional GPS and in some cases improved call quality.
I as well as many others performed many of the other fixes such as flashing back to stock, performing numerous battery pulls, using aGPS patches, making numerous edits to the gps.conf file, reprovisioning our phones, checking different ROMs, uninstalling/reinstalling Google Maps, clearing data for Google Maps and Google Service Framework, and so on. So before you do all of that please give my method a try.
I discovered this simple fix when I was trying to perform one of the other GPS fix procedures. The procedure required me to pull my battery. I noticed that when I removed my back cover that the back frame that has all the screws (10 total) was slightly loose on the left side. Once I tightened them all up my GPS worked immediately! Like I said, this method has been tested by many people and most of them report great success just by tightening their screws. If this method works for you you'll also notice that in addition to getting faster locks your navigation will work and won't drop your GPS signal.
Like I said it may not work for everyone but I would recommend that if you have a Samsung Galaxy S III definitely check the back frame of your phone and make sure you tighten the screws and make sure everything is secure. You too should now be able to achieve GPS locks consistently.
I hope this helps. If it does, as it has many others, please click thanks.
Cheers,
Syintiphic
Click to expand...
Click to collapse
This is the funniest thing in the world!!!!! I was having problems with my weather apps not locating me and I did this and it took a whopping 1/2 sec and it locked. Who know that this would be a fix to GPS. LOL
Thanks for the share!!!

Did anyone ever figure out how or why this works?

soohyunk83 said:
Did anyone ever figure out how or why this works?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?p=39570338
Sent from my Commodore 64..
READY.
load"*", 8,1

Wireless antenna

Hi guys, my super star dhd, wifi antenna broken, it's dropped and wireless not opening... Says error or on - off but not connection.
Where is the wireless antenna? Where can I buy?
sorry my bad eng.
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this part is the wireless antenna

No problem here What do you think ?

wifi hotspot the same error

estremodesign said:
Click to expand...
Click to collapse
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.

Dlog said:
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.
Click to expand...
Click to collapse
i am try new rom and new radio flashed. maybe mainbord problem

coolpixs4 said:
this part is the wireless antenna
Ok thx
Click to expand...
Click to collapse

You should try this rom
ROM: Trickdroid V4.0.0 by torxx
KERNEL: [email protected]
RADIO: 12.39a.60.19U_26.06.06.30_M
I'm using this actually and everything looks fine:fingers-crossed:
even my problem of battery drain was solved, when you flash the rom make the obligatory wipes, then clean the 2 pins of the battery cover, the cooper, this may help and make sure the screws was ok
hope you can fix it:good::fingers-crossed:

I have tha same problem my friends and i tried everything 3 roms (with full wipe) and nothing happends. Also when i activate the bluetooth it seems active but not operate. Any help please.....???

i have same problem with wifi .. if i connect a wire with the terminal i get full signals and if i remove wire i get weak signals.. is my battery cover which is also a wifi antenna has crashed or something should i change the cover ?

hijack :P said:
i have same problem with wifi .. if i connect a wire with the terminal i get full signals and if i remove wire i get weak signals.. is my battery cover which is also a wifi antenna has crashed or something should i change the cover ?
Click to expand...
Click to collapse
Or you can put something on the battery door conections to make them work again. As its just like some conducting paint or something. Or bend the tabs on the phone side a little bit up (BE CARFEULL tho, bend to far and the tab breaks.)
bkoron said:
I have tha same problem my friends and i tried everything 3 roms (with full wipe) and nothing happends. Also when i activate the bluetooth it seems active but not operate. Any help please.....???
Click to expand...
Click to collapse
Answer is posted somewhere i cant remember where tho.
So you'll have to search yourself. (you might want to try wifi error or something).
Goodluck.

HanZie82 said:
Or you can put something on the battery door conections to make them work again. As its just like some conducting paint or something. Or bend the tabs on the phone side a little bit up (BE CARFEULL tho, bend to far and the tab breaks.)
Answer is posted somewhere i cant remember where tho.
So you'll have to search yourself. (you might want to try wifi error or something).
Goodluck.
Click to expand...
Click to collapse
thanks

Looking for Door Panel
Dlog said:
You can see the Wifi antenna connecters on the left side. The antenna itself is part of the battery door. You can see it running along the inside of the battery door covered by black plastic.
From the looks of it, the antenna itself is fine. And even if the antenna was broken, your phone wouldn't say "error". That is very likely a software error. Maybe you could try and reset the phone to factory settings.
Click to expand...
Click to collapse
I have been using my DHD with two batteries for some time now. The frequient pulling out of the battery has taken its toll on the door panel. It is hardly held in place. Along with it, I have started to face issues with Wi-Fi. I am able to connect only when very close to the Wi-Fi router.
Where can I get a replacement door panel. The service centres have been of little help.
MMTIA.

I suggest to take your phone to a technical place. It's not a software problem

Fingerprint hardware not available

Since the laat update im getting this annoying message, the fingerprint goes completely unusable and it is pretty random. It sometimes work and sometimes don't. After restart or turning on it works, but at some point it stopped.
No drops or similar situations to believe it got it damage.
Any one experiencing this?
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CM17X said:
Since the laat update im getting this annoying message, the fingerprint goes completely unusable and it is pretty random. It sometimes work and sometimes don't. After restart or turning on it works, but at some point it stopped.
No drops or similar situations to believe it got it damage.
Any one experiencing this?
View attachment 4548628
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I had this issue once, but it was due to drops, the cable connected to the fingerprint scanner inside the device was a little loose, so all they did was tighten it
you might think its not due to heavy drops, but the slightest drops could cause a disconnection I dont think the issue is software related, if so try different ways, try getting back to nougat, or using xperia companion for software repair, try these methods if the issue persists it means it is a hardware related issue.
I also think its the case because even when the device get the easiest drop that to you its not even concidered a drop, could cause an issue in this particular device.
dont worry, nothing is damaged if you are under warranty and the device looks undamaged as you claim, then you should be covered.
even if youre not under warranty, send your device to sony center, tell them about the problem, i dont think it would cost you so much.
its just a matter of tightening the cables and connections (in my opinion).

madshark2009 said:
I had this issue once, but it was due to drops, the cable connected to the fingerprint scanner inside the device was a little loose, so all they did was tighten it
you might think its not due to heavy drops, but the slightest drops could cause a disconnection I dont think the issue is software related, if so try different ways, try getting back to nougat, or using xperia companion for software repair, try these methods if the issue persists it means it is a hardware related issue.
I also think its the case because even when the device get the easiest drop that to you its not even concidered a drop, could cause an issue in this particular device.
dont worry, nothing is damaged if you are under warranty and the device looks undamaged as you claim, then you should be covered.
even if youre not under warranty, send your device to sony center, tell them about the problem, i dont think it would cost you so much.
its just a matter of tightening the cables and connections (in my opinion).
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Im not sure. After hard reset, it tarted to work normally and actually asked me for fingrprints, bt after set up all the phone, even the software option to manage your finger prints was gone.

CM17X said:
Im not sure. After hard reset, it tarted to work normally and actually asked me for fingrprints, bt after set up all the phone, even the software option to manage your finger prints was gone.
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yes it does seem like a loose connection, some times the electric circle is ok then the fingerprint works for a while, then outta no where the cord connecting of the fingerprint to the motherboard gets some how slightly moved from its position then the electric circle is open and there is no connection from the motherboard to the Fingerprint scanner so it does seem like that, if youre still uncertain you can always perform a software repair or revert back to nougat but I'm almost certain that its NOT a software related issue.
I do suggest you sending your device to a Sony center in your area to have it looked at.
even if youre not under warranty, tell them you highly believe its just a connection issue, it shouldnt cost much, but if they checked and claim that its something rather so expensive, you can deny their request of fixing the issue.
but again if you are certain your device looks undamaged and as good as new with only minor scratches and no sign of a significant drop damage or water damage then in my opinion youre good to go.
If you also think Sony will use any excuse to make you pay for only "spectating" your device for issues in case you are not under warranty, if the amount is low I think its only fair you confirm the suggestion.
in case you think they would charge you so much and you are uncertain of how much they would make you pay, I believe a phone call to Sony center for information confirmation should tell you exactly what you need to know.
in case none of the solutions were good enough for you, you can always use Youtube or Google to help you open your device by yourself and make sure the fingerpring scanner is perfectly connected, or buy that part by your self and install it if you think it would be a more cost efficient solution.

This is bad.

CM17X said:
This is bad.
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no its not really bad dude, call sony support center in your area and ask for information on the problem and ask them if they charge a lot
are you not under warranty?