A520W WiFi keeps dropping after upgrading to Oreo - Samsung Galaxy A3, A5, A7 (2017) Questions & Answe

My wife and I both have SM-A520W phones. I OTA upgraded mine while travelling in Europe (risky, I know) and didn't have any issues with it. I waited til we returned to upgrade hers, and since upgrading, she has been unable to maintain a WiFi connection beyond a number of minutes, e.g. 5-30 minutes.
I downgraded her phone to Nougat (A520WVLS2BRD2 / A520WOYA2BRD2) using Odin, and things returned to normal. When the July 1st patch (A520WVLU2CRF2 / A520WOYA2CRF2) for Oreo was released I tried upgrading it again over the air, and the WiFi issues returned. Unfortunately after upgrading to this version, I can no longer use Odin to downgrade to Nougat, as it results in a "kernel rev check fail device 1 binary 0" even if I don't load the bootrom. I tried doing a fresh load with Odin of the latest Oreo release as well, but the issue persists.
Any suggestions on either how to downgrade to Nougat, or resolve the WiFi issues on her phone? It seems surprising to me that one phone works fine, and the other one fails repeatedly on the same network and carrier (Freedom). Any suggestions would be appreciated.

Hi. I have the same problem. Were you able to resolve the issue?

Unfortunately not in any way that will be helpful. Took the device to an authorized Samsung repair place, they ran diagnostics, and then offered to swap the main board. They did that, and everything has been fine since.

mutantlog said:
Unfortunately not in any way that will be helpful. Took the device to an authorized Samsung repair place, they ran diagnostics, and then offered to swap the main board. They did that, and everything has been fine since.
Click to expand...
Click to collapse
Could have been a software bug. Personally, I would have got a new phone rather than getting a new motherboard.

Related

Custom ROM to fix wifi issues?

I bought a Defy second hand on ebay locked to T-Mobile UK. I don't have a T-Mobile SIM so I booted it up to test over wifi. However the wifi will only connect if I switch my router to G, and even when it does say it is connected I can't get on the net despite every other PC in the house working fine. I even changed the networks to open to rule out the security but with no luck.
Since I can't do an official update without a SIM (Or so the Motorola software tells me, I wonder what would happen if I went ahead) I was thinking of rooting and installing a custom ROM to see if this helps. However, obviously if I do this I won't be able to dispute the purchase on ebay so I want your advice before I plough on.
Do you think that a custom ROM will fix my wifi issue or is it more likely to be a faulty Defy that the seller has fobbed off on me?
Cheers.
from a technical point of view i dont think that the defy's hardware is faulty, i've heard of such wifi issues with some routers, even had some with mine with an early version of pays rom, so a custom rom will probably solve your problem.
and i recommend a custom rom over any official blur crapped software.
try miui.
Well I went ahead and put on the MIUI ROM but it has the same issue! Does this phone require a SIM to do anything? Do I need to be signed into a google account just to go on to the net?
windywoo said:
I bought a Defy second hand on ebay locked to T-Mobile UK. I don't have a T-Mobile SIM so I booted it up to test over wifi. However the wifi will only connect if I switch my router to G, and even when it does say it is connected I can't get on the net despite every other PC in the house working fine. I even changed the networks to open to rule out the security but with no luck.
Since I can't do an official update without a SIM (Or so the Motorola software tells me, I wonder what would happen if I went ahead) I was thinking of rooting and installing a custom ROM to see if this helps. However, obviously if I do this I won't be able to dispute the purchase on ebay so I want your advice before I plough on.
Do you think that a custom ROM will fix my wifi issue or is it more likely to be a faulty Defy that the seller has fobbed off on me?
Cheers.
Click to expand...
Click to collapse
I just updated my wife's defy to 2.2 this morning using MSU and it didn't have a SIM in it, it is for her birthday and i didn't want her to wonder why i wanted her SIM card.
All went smoothly.
Man i sugest first flash the nordic sbf FULL and after you flashed the sbf the play with custom roms like miui or cyanogen mine camed locked on orange i flashed the nordic 177 full sbf and after that it was all ok
RSDLite just gave me told me it failed when I tried the Nordic ROM.0x1700
I tried with the TMobile UK stock SBF file but it sticks in a boot loop between the Moto blur logo and TMobile. I flashed the 2.21 boot but no joy.
I flashed a T-MObile UK Froyo ROM and it boots and connects to open G wifi. Still no internet however.
i had the same problem connectiong to n-draft router, the connection got lost after some seconds. my solution was to edit the tiwlan.ini with root-explorer and change HT_Enable=0 to HT_Enable=1
you have to give the file write permission to save.
Chers for the tip, but now I discover this damn ROM is not rootable. At least, not with z4root.
Super one click did the job, but the file you mentioned already has HT_Enable = 1
***I managed to get the nor ROM to flash by running as admin and giving it a short name and putting it in the root directory! But guess what? Still no internet despite strong wifi signal. I don't know how to downgrade now to the original ROM. The one listed as T-Mobile UK 2.1 doesn't boot.
Now the phone isn't recognised by RSD at all. The white LED comes on though, there is some sign of life.
Bought a battery charger to charge the battery externally but still no joy when I plug the phone into a computer.
***nvm somehow it's working now. Flashing the nor ROM.
None of the SBF files seem to work now. Either I get a blank screen on boot or they get as far as the Moto logo (or android in the case of the nor rom) and loop.
Is it safe to flash other countries SBFs and then change the language?
can you try other people's wifi to see if you will encounter the same problem? if you don't then youneed to configure your router. flashing other country's sbf is ok, then use baseband switcher incase you have signal problems. wipe first before flashing

[Q] Samsung Nexus wi-fi issues, firmware or hardware?

I've been dealing with this issue for just about 2 weeks, and i have no clue what to do...
The Wifi on my phone will not turn on at all. Even after a factory reset (many factor resets). So after looking around I thought rooting the phone and upgrading to Kit-Kat would help. But even after doing that, my phone still would tell me the phrase "turning on WiFi" and would never turn on.
So i flashed back to 4.3 and unrooted my phone to send it to Samsung. Samsung USA claims that they cannot take my phone b/c its a global phone based on the IMEI, but the problem sounded like a hardware issue because a light doesn't flash when i try to turn on the wifi.
LASTLY I went back to the people who sold me the phone, and they claim its a firm ware issue, and that i have to bring the phone back to 4.1 for it to work.
Is this wifi problem firmware or hardware issues? If its hardware, is there a way to make the phone 4.1 without rooting it?
genetic_discount51 said:
I've been dealing with this issue for just about 2 weeks, and i have no clue what to do...
The Wifi on my phone will not turn on at all. Even after a factory reset (many factor resets). So after looking around I thought rooting the phone and upgrading to Kit-Kat would help. But even after doing that, my phone still would tell me the phrase "turning on WiFi" and would never turn on.
So i flashed back to 4.3 and unrooted my phone to send it to Samsung. Samsung USA claims that they cannot take my phone b/c its a global phone based on the IMEI, but the problem sounded like a hardware issue because a light doesn't flash when i try to turn on the wifi.
LASTLY I went back to the people who sold me the phone, and they claim its a firm ware issue, and that i have to bring the phone back to 4.1 for it to work.
Is this wifi problem firmware or hardware issues? If its hardware, is there a way to make the phone 4.1 without rooting it?
Click to expand...
Click to collapse
If it's the international version you can get the official factory images from here: https://developers.google.com/android/nexus/images
Don't know if you should use the takju or yakju version, but I've heard they should both work.
The instructions on how to flash are on that page as well
That being said I don't think flashing the old rom will fix it. It's probably a hardware problem.... but, you never know

WIFI will not turn on

Hi guys i have a lg g3 that has been running fine on kitkat
it the received the lollipop update OTA and all went fine apart from now it wont turn the WiFi on
you can click it on and it moves to on but seems to be always trying to turn on..?? without turning on.?
any ideas..?
I have done a reset etc still no joy
Did you try to reflash? (I think that you mean by resetting that you full wiped your phone and not reflashed the rom)
KingOfDope said:
Did you try to reflash? (I think that you mean by resetting that you full wiped your phone and not reflashed the rom)
Click to expand...
Click to collapse
Yes after it updated to lollipop I lost the ability to turn on wifi..
It was there to turn on but would not it showed it trying to turn on but just hung trying to turn on..device updated from kitkat to lollipop via its own update OTA.
Cn not work it out
sas007 said:
Yes after it updated to lollipop I lost the ability to turn on wifi..
It was there to turn on but would not it showed it trying to turn on but just hung trying to turn on..device updated from kitkat to lollipop via its own update OTA.
Cn not work it out
Click to expand...
Click to collapse
Try flashing the correct modem
KingOfDope said:
Try flashing the correct modem
Click to expand...
Click to collapse
Why or how could I do that..
Device was on stock kit Kat and it updated itself to lollipop..
Sent from my LG-D855 using XDA Free mobile app
Same issue here.
I get around it by forgetting network then just signing in again. Wifi works perfectly until I leave the house and return later. Then I just do the above and viola, working wifi.
I've checked with speed test app and wifi is definitely working.
Funny thing is, if I switch off wifi then turn back on it also works.
Only when ive left home and returned later does this bug arise.
Hello guys,
This thread is a little bit old, but I am curious to know if you found a workaround for this issue.
I have the same problem as the OP (not at the second poster): since I received Stock Lollipop the WiFi won't turn on. When I try to, it says "turning on" for a while then acts like it is off.
I just bought my LG G3, NCIX the reseller, refuses to refund me or replace my phone...
I performed several factory resets and tried to flash different KK stock Roms. The weird thing is that the WiFi works with KK...
Thanks for your help.
Identical experience here.
I recently got a D855 16GB, which was on stock unbranded V10a, jumped through several OTA updates through V10g, V10j, and V10k (IIRC) all with wifi working fine before getting the lollipop upgrade OTA for V20c.
Immediately wifi will not switch on - the switch itself is on, but with the off section a lighter grey compared to the bluetooth switch.
On the wifi screen itself it says "Turning Wi-Fi on..." but after a while the switch reverts to off.
It's now had OTAs to V20e and V20h, but wifi is dead on both versions.
Note that this is stock and unrooted (never rooted) so I can't believe it's something I've done. Next trick will be to root and poke around /data/misc/wifi.
Does bluetooth work or the problem is only with the wifi? I also have the same problem, wifi, bluetooth is not working and when I check in the settings the mac adress it says "unknown".
Sent from my Onda V975m using Tapatalk
Accountability
Unfortunately this isn't a unique problem. There have been countless bad updates from multiple manufacturers. In this litigious world, I'm surprised no one has sought damages for bad updates that effect usability.
I have the same problem from yesterday. wifi and bluetooth seem to be turning on but they never turn on. i've done many factory resets but it didn't work. has someone found a solution?
^^^ Exactly the same issue. Would love a solution!
Same issue. Tried Hard and soft reset and have also updated firmware using LG Mobile Support Tool but had no success.
sazi said:
I have the same problem from yesterday. wifi and bluetooth seem to be turning on but they never turn on. i've done many factory resets but it didn't work. has someone found a solution?
Click to expand...
Click to collapse
ok, after 24h with this problem I think I got it back to working. Let me explain what have I done:
1. Mine is a dual sim model, that I bought in hong kong by the end of 2014.
2. Yesterday, I removed sim #2 (no longer needed), without removing the battery. I had a couple of messages indicating to restart the phone, blah blah. Can't remember if I finally restarted it or not.
3. This morning I saw no wifi connection in my phone, only 3G. Tried to start wifi in the quick access menu, but this kept blinking, never starting wifi. Restarting phone... nothing. turning off bluetooth... nothing.
I figured out that the problem had to be related with the SIM as this is the last thing I had done with the phone. Thus, I tried this, with success:
4. I turned off the phone, changed sim from slot #1 to slot#2 and started the phone. Wow, it worked for some minutes, then stopped, then started again. Well, a good sign.
5. Changed again sim from slot #2 to slot #1: Wifi working again. After some time it stopped working, but soon started again. Hasn't given me more problems (after only 30 min, that's true).
Hope it helps.
jimbobmcginty said:
Identical experience here.
I recently got a D855 16GB, which was on stock unbranded V10a, jumped through several OTA updates through V10g, V10j, and V10k (IIRC) all with wifi working fine before getting the lollipop upgrade OTA for V20c.
Immediately wifi will not switch on - the switch itself is on, but with the off section a lighter grey compared to the bluetooth switch.
On the wifi screen itself it says "Turning Wi-Fi on..." but after a while the switch reverts to off.
It's now had OTAs to V20e and V20h, but wifi is dead on both versions.
Note that this is stock and unrooted (never rooted) so I can't believe it's something I've done. Next trick will be to root and poke around /data/misc/wifi.
Click to expand...
Click to collapse
HELLO
I have exactly the same problem and I think we're not the only...
D855 :
-Wifi and Bluetooth doesn't work.
-Wifi keep turning on itself and the battery drain..
-3g/4g works perfectly.
-Downgraded on kk and Wi-Fi works so it is not a hardware issue
-Even on fulmics Rom Wi-Fi and Bluetooth doesn't work
HEELP ME PLEASE
Got the same problem here. I have my G3 since november 2014 and recently I rooted it to install CM 13 on it and Xposed bcs I got tired of the laggy software of LG. One morning I woke up to drink some water and saw my phone restarting a lot of time... ok I thought its a simple bootloop. Tried to install CM again, didnt fix it. Flashed stock software and still... Bought new battery and new power flex and the problem is still there. I go into download mode, installed the software with LGs support tool and got pass the bootloop, but now wifi nor bluetooth works. I thought it's the software so I dared myself again to root it and installed TWRP and CM13, but it wouldn't boot. I installed then Liquidsmooth, based on CM13, and got it to boot up, but in the configuration menu where WiFi is needed to be added it couldn't turn on. I skiped it and in the middle of the process it started again to restart. I don't know if it's a hardware based problem or software... But I would like to try everything out before I have to buy a new phone.
SoulEater45 said:
Got the same problem here. I have my G3 since november 2014 and recently I rooted it to install CM 13 on it and Xposed bcs I got tired of the laggy software of LG. One morning I woke up to drink some water and saw my phone restarting a lot of time... ok I thought its a simple bootloop. Tried to install CM again, didnt fix it. Flashed stock software and still... Bought new battery and new power flex and the problem is still there. I go into download mode, installed the software with LGs support tool and got pass the bootloop, but now wifi nor bluetooth works. I thought it's the software so I dared myself again to root it and installed TWRP and CM13, but it wouldn't boot. I installed then Liquidsmooth, based on CM13, and got it to boot up, but in the configuration menu where WiFi is needed to be added it couldn't turn on. I skiped it and in the middle of the process it started again to restart. I don't know if it's a hardware based problem or software... But I would like to try everything out before I have to buy a new phone.
Click to expand...
Click to collapse
I'm not the only one
I don't understand why it doesn't work because if you downgrade on kk versions your wifi & bluetooth will be back...
tchointeur said:
I'm not the only one
I don't understand why it doesn't work because if you downgrade on kk versions your wifi & bluetooth will be back...
Click to expand...
Click to collapse
Have you maybe tried to change the kernel of your device? I have never done that so I am scared if I would damage something.
http://forums.androidcentral.com/google-nexus-7-tablet-2013/306730-wifi-stuck-turning.html
Here someone says it's the kernel that is having problems and installing a new one and going maybe back to the old one will fix it.
SoulEater45 said:
Have you maybe tried to change the kernel of your device? I have never done that so I am scared if I would damage something.
http://forums.androidcentral.com/google-nexus-7-tablet-2013/306730-wifi-stuck-turning.html
Here someone says it's the kernel that is having problems and installing a new one and going maybe back to the old one will fix it.
Click to expand...
Click to collapse
Maybe but wich kernel do we haveto use? Even on fulmics 5.3 it doesn't work!
tchointeur said:
Maybe but wich kernel do we haveto use? Even on fulmics 5.3 it doesn't work!
Click to expand...
Click to collapse
I installed CM13 and in the setup screen I actually had wifi and I could connect to my router. It was kinda strange. But bcs I have some problems beside wifi, the reboot thing, I couldn't test out if it works too. Try flashing CM13 or ROMs that are based on it like Liquidsmooth. Maybe it will help.
SoulEater45 said:
I installed CM13 and in the setup screen I actually had wifi and I could connect to my router. It was kinda strange. But bcs I have some problems beside wifi, the reboot thing, I couldn't test out if it works too. Try flashing CM13 or ROMs that are based on it like Liquidsmooth. Maybe it will help.
Click to expand...
Click to collapse
I tried flashing other roms but twrp says "unmount of /system failed: no such volume " "script succeeded: result was (0.20000)".. when i restart it's on bootloop NO CHANCE

No SIM and Wi-Fi dropping issues

- vs985 -
About 3 days ago my phone started to have Wi-Fi disconnecting issues. I formatted everything outside of external sd card and put back the same rom I had installed with no previous issues, xdabbeb's 47a rooted following instructions 100% as I had previously. Still, wifi issues where it will connect / disconnect. Rebooting the phone or turning on / off wifi or even bluetooth has no effect. Complete randomness seems to "fix" it but wifi will only stay on for a few minutes at a time. Multiple other devices on my same network have no issues. Still, rebooted and even factory reset the router just to be sure. No change.
Something I thought was an isolated issue, I had a "no sim" message a few months ago and Verizon replaced my sim card and the problem seemed to go away. Today though, while trying another reformat, I got the "no sim" card on the initial setup screen and before even finishing the setup via wifi, the wifi disconnected multiple times.
I'm thinking hardware is to blame especially since there were no apps installed to conflict with the os software.
I'm really not wanting a new phone, should I look to replace the motherboard? I can diy it np. Or, should I bite the bullet and buy a ::shutter:: new phone.
Orrrr... is there anything else I should try software wise?
So since having issues and formatting down to internal storage and reinstalling the stock rooted 46a kdz with no positive results, I flashed the 10b and attempted to take the OTA's. The OTA's failed for 10b so I flashed the 24b and was able to take all the OTA's. I'm on 47a right now and haven't had any wifi issues. I'm going to give it a few days of usage to see if it's "fixed." Afterwards though, I plan to go back to the stock rooted 46a so I can use my rooted apps like titanium and hopefully find the issue still fixed. I do know there is a kingroot option for stock 47a, but I also find a lot of negativity about it's communication with sensitive data and installing apps behind the scene so I'd rather not go that route.
I'll keep updating in case anyone else has similar issues.

Moto z play with imei and without signal

How are you!
I hope that someone can help me with this, I had installed the Nougat version of January and everything had worked totally normal for 3 months, so yesterday I put the device in airplane mode for a couple of hours and when I removed it I have no signal. Then I decided to install the latest version of Nougat in this case with security patch March, and the problem is still the same, I do not have the problem that my IMEI has been deleted and besides that I start to be without signal with the equipment Fully functional, everything started when I put it in airplane mode.
Does anyone know it could have happened? My device is XT1635-02, my IMEI appears perfectly in IMEI information and in SIM status
Also I already probe with other SIM and neither is that, I have reinstalled three times the last Firmware of March the first time without the modem commands, and the last two times includes the modem commands and I continue without signal and obviously without loss of IMEI
cygnus56 said:
How are you!
I hope that someone can help me with this, I had installed the Nougat version of January and everything had worked totally normal for 3 months, so yesterday I put the device in airplane mode for a couple of hours and when I removed it I have no signal. Then I decided to install the latest version of Nougat in this case with security patch March, and the problem is still the same, I do not have the problem that my IMEI has been deleted and besides that I start to be without signal with the equipment Fully functional, everything started when I put it in airplane mode.
Does anyone know it could have happened? My device is XT1635-02, my IMEI appears perfectly in IMEI information and in SIM status
Also I already probe with other SIM and neither is that, I have reinstalled three times the last Firmware of March the first time without the modem commands, and the last two times includes the modem commands and I continue without signal and obviously without loss of IMEI
Click to expand...
Click to collapse
Mam be hardware issue ..,..
You should give it to service center.
What is the probability that a hardware problem caused it to put the device in airplane mode for a couple of hours?
cygnus56 said:
What is the probability that a hardware problem caused it to put the device in airplane mode for a couple of hours?
Click to expand...
Click to collapse
Have tried any custom ROM available on xda ....?
Just asking
What is the probability that a software problem caused it to put the device in airplane mode for a couple of hours?
jatinkhatri said:
Have tried any custom ROM available on xda ....?
Just asking
Click to expand...
Click to collapse
If I had installed the first version of this post, from February to the beginning of this month it worked perfectly, then I put it in airplane mode for a couple of hours and I left without a signal, update to the last version of March and I still have no signal , I have not lost the IMEI
https://forum.xda-developers.com/moto-z-play/development/rom-stock-7-0-t3553213

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