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Trouble on wifi. Will this fix it?

Hi. So, I just got a Samsung S3 GT-I9305 from Vodacom. Got it from eBay. But, I'm having trouble connecting to the wifi. Whenever I connect to the wifi it always says "Authentication error occurred". I turned off the wifi thingy using *#0011# and wiped the cache, I even reset the phone to its factory settings. I sometimes connect to a wifi, but it takes 1 hour or so before being connected. And I have trouble downloading from the playstore. Did everything I could find from the web. No luck.
So, I was thinking, If I would flash a custom rom to my device, will it fix the wifi issue? And would any stock firmware of the I9305 device work?
Thanks! Sorry for being noob.

Denzel07 said:
Hi. So, I just got a Samsung S3 GT-I9305 from Vodacom. Got it from eBay. But, I'm having trouble connecting to the wifi. Whenever I connect to the wifi it always says "Authentication error occurred". I turned off the wifi thingy using *#0011# and wiped the cache, I even reset the phone to its factory settings. I sometimes connect to a wifi, but it takes 1 hour or so before being connected. And I have trouble downloading from the playstore. Did everything I could find from the web. No luck.
So, I was thinking, If I would flash a custom rom to my device, will it fix the wifi issue? And would any stock firmware of the I9305 device work?
Thanks! Sorry for being noob.
Click to expand...
Click to collapse
Hi,
I think it could be a router issue. You should :
- reset your router and retry to connect with your i9305,
- play with WIFI network settings in router. Maybe something doesn't allow your i9305 connection (network type, firewall, etc.). I'm not an expert in router settings, so you could google this to help you.
- try another WIFI network (from a friend, at work, anywhere you can test )
I think that flashing a custom ROM won't change anything. First try to fix your problem with stock firmware.

Wifi woes with the Z3 Compact

Hello all,
Just having an issue with my Z3 compact. The wifi keeps connecting and disconnecting every few seconds. This is a new development and it has never done this in the two years I've owned it. It finds the networks, connects and then promptly disconnects after a few seconds and then starts to look for networks once again.
Here are a few things I've already tried....
I have tested the same WiFi network with my S7 and laptop and they are stable on this network.
I have tried a different WiFi network with the same results
I have downgraded to a previous TWRP backup of my ROM when the phone was still stable.
I have changed the ROM completely with a factory reset and new custom ROM flash
None of the above has worked so far so not sure what has happened and if this is a possible hardware failure of the modem? Is there a modem file that could possibly be flashed?
Thanks for the help.

zimcommando said:
Hello all,
I have tested the same WiFi network with my S7 and laptop and they are stable on this network.
I have tried a different WiFi network with the same results
I have downgraded to a previous TWRP backup of my ROM when the phone was still stable.
I have changed the ROM completely with a factory reset and new custom ROM flash
Thanks for the help.
Click to expand...
Click to collapse
This has been mentioned several times in the Q&A thread, and @toxic-hero even posted a fix

Thanks Didgesteve,
I have tried the Legacy DHCP Client fix in the developer settings and I've also done a "Network settings reset" under Settings > Backup & reset before rebooting and still no help. The issue persists and I'm at a loss as to what the hell has happened here....

Same problem... I still have guarantee, so I flashed back the original up-to-date firmware and the phone was sent back to the local sony service, and I'm waiting for it.

Samsung SM-T813 FRP Locked WiFi Switch Greyed Out

Hi,
First, I want to say that I have been looking though many threads with similar problems but I have not found any that have worked for me. If someone could point me to the thread that will solve this problem I would greatly appreciate it.
So my situation is that tablet boots to the "Welcome! Start >" screen and when I hit Start it says "An unauthorized attempt has been made to reset your device to factory default settings. Connect to a Wi-Fi or mobile network to verify your identity." When I move the WiFi switch to "ON" it immediately goes back to "OFF".
I would like to find a way to enable the WiFi so I can enter my credentials but so far all my attempts have failed.
I am running
SAMSUNG/GTS210VEWIFIXX/GS210VEWIFI
6.0.1/MMB29M/T813XXU2APJ1
MMB29M.T813XXU2APJ1
Any attempts to downgrade to T813XXU1APF4_T813XAR1APF1_HOME.tar.md5 in ODIN v3.13 have resulted in [aboot] Fused 2 > Binary 1
Any suggestions to get my tablet up and running again would be greatly appreciated.
Thanks in advance.

After installing COMBINATION_OXA_FA60_T813XXU2API1_OXAFAC_CL7807521_BoxWares.tar.md5, enabling USB debugging, and then installing stock ROM T813XXU2APJ1_T813XAR2APJ1_HOME.tar.md5 I was able to boot to the home screen and login as a guest.
However, in guest mode I cannot enable the Wifi or Bluetooth switches to ON. They just go back to OFF.
I also cannot enable Wifi as Owner so I can enter my login information.
If anyone has any ideas on how to turn Wifi back on I would greatly appreciate the help.

ashlikesnow17 said:
After installing COMBINATION_OXA_FA60_T813XXU2API1_OXAFAC_CL7807521_BoxWares.tar.md5, enabling USB debugging, and then installing stock ROM T813XXU2APJ1_T813XAR2APJ1_HOME.tar.md5 I was able to boot to the home screen and login as a guest.
However, in guest mode I cannot enable the Wifi or Bluetooth switches to ON. They just go back to OFF.
I also cannot enable Wifi as Owner so I can enter my login information.
If anyone has any ideas on how to turn Wifi back on I would greatly appreciate the help.
Click to expand...
Click to collapse
Reinstall the combo firmware then enter settings and factory reset.
Reinstall stock firmware.

I reinstalled the Combo Firmware, did a factory reset from settings, and reinstalled the Stock ROM but the WIFI & Bluetooth will still not enable.
I am waiting to for some other versions of Stock ROM to download and then install to see if it makes any difference.

ashlikesnow17 said:
I reinstalled the Combo Firmware, did a factory reset from settings, and reinstalled the Stock ROM but the WIFI & Bluetooth will still not enable.
I am waiting to for some other versions of Stock ROM to download and then install to see if it makes any difference.
Click to expand...
Click to collapse
Are you flashing the WHOLE firmware?

The full firmware I have tried installing so far I have gotten from Updato: T813XXU2APJ1_T813XAR2APJ1_HOME.tar.md5, T813XXU2APK6_T813XAR2APK6_HOME.tar.md5, & T813XXU2BQD1_T813XAR2BQD1_HOME.tar.md5 which was the firmware I had updated to before downgrading to APJ1.
The tablet has only been used a couple of times so I find it hard to believe the chip is damaged. I bought it as an open box from a retailer with no signs of use.
It was after I did a FRP when I couldn't remember my password when all the trouble started.
Is there some firmware that consists of BL, AP, CSC files that is used during factory setup that I can install?

ashlikesnow17 said:
The full firmware I have tried installing so far I have gotten from Updato: T813XXU2APJ1_T813XAR2APJ1_HOME.tar.md5, T813XXU2APK6_T813XAR2APK6_HOME.tar.md5, & T813XXU2BQD1_T813XAR2BQD1_HOME.tar.md5 which was the firmware I had updated to before downgrading to APJ1.
The tablet has only been used a couple of times so I find it hard to believe the chip is damaged. I bought it as an open box from a retailer with no signs of use.
It was after I did a FRP when I couldn't remember my password when all the trouble started.
Is there some firmware that consists of BL, AP, CSC files that is used during factory setup that I can install?
Click to expand...
Click to collapse
4 file repair firmware can be found below:
https://combinefile.com/index.php?a=downloads&b=folder&id=6185

ashyx said:
4 file repair firmware can be found below:
https://combinefile.com/index.php?a=downloads&b=folder&id=6185
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Click to collapse
I appreciate your help but nothing I do will apparently get the Wi-Fi working again.
I am giving up for now and am considering replacing the motherboard.

XZ3 wifi problems

I'm just having a lot of problems withmy xperia xZ3 (H9394). In Monday, I updated google services and after that, the phone didn't connect to wifi or mobile data. I make a factory reset but it didn't work. I assumed the problem came from that update and everything will be fixed if I downgraded firmware. I tried first with sony emma flashtool, but I needed the bootload of my device to be unlocked. I unlocked it (yes, I screwed it) but emma said "no available services matched", so I tried it with newflasher and downgraded firmware, but it stayed in bootloop. So, I return to original firmware (52.1.A.3.92-R4C). It boot normally, but I have the same issues with wifi and mobile data, sometimes it works, but connects and disconnects constantly.
Someone can say me what can I do? I know that I can't relock bootloader.
@MartinX3 I know that you are a master, colud you help me?
Thanks! <3

I would look if that problem is the same on a custom ROM. (But flash on both slots and boot the latest stock first until you reach the desktop)
Or if it only happens with a specific WiFi, maybe the router need updates or a fix.

MartinX3 said:
I would look if that problem is the same on a custom ROM. (But flash on both slots and boot the latest stock first until you reach the desktop)
Or if it only happens with a specific WiFi, maybe the router need updates or a fix.
Click to expand...
Click to collapse
Thanks for reply.
What did you mean with flash both slots?
I have tried it with rom H9493_Customized CN_52.1.A.3.92-R14C, wifi and mobile data works. The problem now are the google services. I think it's a firmware problem...

crashas12 said:
Thanks for reply.
What did you mean with flash both slots?
I have tried it with rom H9493_Customized CN_52.1.A.3.92-R14C, wifi and mobile data works. The problem now are the google services. I think it's a firmware problem...
Click to expand...
Click to collapse
You have an A/B device
So you have two slots

MartinX3 said:
You have an A/B device
So you have two slots
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Click to collapse
Hello. I flashed again with 52.1.A.3.92-R4C custom Taiwan downloaded from xperifirm and it work for a time. First, I didn't have any issue with wifi and had 4G signal, but after hours, the problems came again and lost mobile and wifi signals. At that moment, I couldn't even activate wifi, when I turned it on it turned off immediately. For some reason, I activated airplane mode and turn on wifi and it worked, but when I turn off airplane mode, lost wifi signal. It's very strange. I think it's some problem with mobile data or something.
I will flash A/B slots. For that, I need the GSI and ASOP (Android 10.0 – Kernel 4.14 – Tama) img and I must do it with platform-tool, right? I don't need a firmware in tft?
Thanks.

crashas12 said:
Hello. I flashed again with 52.1.A.3.92-R4C custom Taiwan downloaded from xperifirm and it work for a time. First, I didn't have any issue with wifi and had 4G signal, but after hours, the problems came again and lost mobile and wifi signals. At that moment, I couldn't even activate wifi, when I turned it on it turned off immediately. For some reason, I activated airplane mode and turn on wifi and it worked, but when I turn off airplane mode, lost wifi signal. It's very strange. I think it's some problem with mobile data or something.
I will flash A/B slots. For that, I need the GSI and ASOP (Android 10.0 – Kernel 4.14 – Tama) img and I must do it with platform-tool, right? I don't need a firmware in tft?
Thanks.
Click to expand...
Click to collapse
For the custom ROMs you need to have the latest firmware on both slots and booted once until you reach your apps.
Then just follow the instructions of the XDA threads and don't forget a fullwipe.

MartinX3 said:
For the custom ROMs you need to have the latest firmware on both slots and booted once until you reach your apps.
Then just follow the instructions of the XDA threads and don't forget a fullwipe.
Click to expand...
Click to collapse
Hello again. I downloaded Android 10 GSI from https://developer.android.com/topic/generic-system-image/releases and AOSP 10 for XZ3 from https://developer.sony.com/file/download/software-binaries-for-aosp-android-10-0-kernel-4-14-tama/. I used the latest platform tools. I flashed oem_a, oem_b, system_a and system_b. After that, I did a wipe with fastboot -w command and finally reboot my device.
I checked that everything worked fine. Wifi and both sims worked fine.
After that I flashed the firmware H9493_Customized TW_52.1.A.3.92-R4C with newflasher and wiped it again. Did I do everything correctly?
Thanks.

If anyone wonders, no. It didn't work. I tried with custom roms and it was the same

I tried everything. I tried installing LineageOs, pixelsperience, Sony AOSP 10, 11, gsi 10, 11, and stock roms and nothing. Sims are detected some time, but stop after a while. i put an sd card instead of a sim card and it was not detected. I assume it is a hardware problem.
Well, thanks for helping

I'm having this exact same problem on my XZ3, thought I was going crazy but makes me think it's maybe not hardware related to find someone else with the problem...

Pixel 4xl No Network No Signal

I have flashed the stock firmware, flashed the modem, factory reset and nothing helps. I have accessed the service menu and tried enabling radio power but to no avail. How can I fix this? I got a new sim card as well so its not that. When I try to make a call it says please disable aeroplane mode but it is disabled. pls help

rooman1803 said:
I have flashed the stock firmware, flashed the modem, factory reset and nothing helps. I have accessed the service menu and tried enabling radio power but to no avail. How can I fix this? I got a new sim card as well so its not that. When I try to make a call it says please disable aeroplane mode but it is disabled. pls help
Click to expand...
Click to collapse
Me too. No mobile signal, Wifi, Bluetooth. But USB type-C to RJ45 LAN adapter is working. I tried many things except change mainboard.