Develop Bugs

[Q] Problem with Signal/Service - weak Signal, breakdowns

my device now: i9195, I9195XXUCNE6-DBT
I experience weak signal and many connection dropdowns. When this occured first, after i upgraded f4ktion Kernel 1.3.6 to 1.4.5 and
an older version of Carbon Rom (4.2.2) to 4.3 Carbon Rom. Until than everything was fine, flash of rom and kernel did not made any problem.
Btw i used Odin3 3.09 and clean install (step by step like in the guides) all the time.
After some days this realy annoyed me, so i went back to the older Carbon and kernel - problem still occurs.
So i went back to stock rom I9195XXUBML4-DBT (original was UBML4) - problem still existing.
Some time later f4ktion 1.5 and Carbon 4.4.4 was available, so i tried this..still no solution.
Now i am back to stock and updated to I9195XXUCNE6-DBT, same problem.
Some research told me many ne stuff to know..like flashing modem only. I tried some, nothing helped.
After hours of pointless googleing i noticed something on my phone.When i dont type the pin, i have normal signal. As soon as i type the pin
and "activate" my simcard, the signal strength drops. So i googled again and found this:
[Bug Watch] Android 4.3 Radio Bugs Causing Cell Connection Drops On Some Nexus 4 Handsets, Fixes In Sight (not allowed to post links)
I changed the network type to WCDMA only - it helped for some minutes(not many..maybe 2-3). I changed to GSM only and i had normal,
stable signal for like an hour. But later signal loses strenght again, and i need to change network type again.
I have the feeling, that its like a reset or restart of the radio.
But now i am all out of ideas and need some help.
Last thing i can do, is to bring it to repair. But my Knox says 0x1, so maybe you can help me before i ask Samsung.

I have similar problem since ugrading to KitKat roms. I had no problems with previous none Knox roms with MH3 modem but now with NE6 and NF7 KK modems the signal swings constantly up and down from 4 to 1 bars. This is in areas I previously had good signal. Internet also keeps dropping out requiring data toggling on and off. I've reflashed KK 20+ times and haven't been able to get rid of this problem yet.
I'm not sure if pre knox modems are installable but I intend to try and reflash MH3 modem, once I manage to do a successful backup.

I solved a similar problem by downgrade to 4.2.2 Brazil NE2, knox 2. Flashing separate modem (NE2), and reflashing full rom again. No problems for now

Now you stay on 4.2.2 ?
I dont understand why some people do have problems and some not. Is there different hardware version causing the trouble ?
Give me pls some information how you did the downgrade.
-Nandroid Backup
-philz
-Odin (if yes which version)
-why did you choose that rom
I tried to, but wasnt succesfull. I used Odin3 3.09 to flash 4.2.2 (UAMF5 i think) rom and got a brick. When trying to fix this nothing helped until i tried to flash with Odin3 3.04. But all i could do was flashing newest FW again. Did not test more after that, because i was very busy.
If you say that going back solved your problem, i will try again go go back myself. I've found some information on that and when its done i give some informations.

Same here, help?
I'm having the same problem with a newly acquired handset. I have full signal on some places and nothing on others, unfortunately in my house I have no signal! So it's quite exasperating.
My baseband version is I9195XXUCNE6
Android version is 5.0.2 with 3.4.0-cyanogenmod-g92aec50 [email protected] #1 kernel
Cyanogenmod version is 12-20150306-UNOFFICIAL-serranoltexx
Would it help if I flash a separate modem file through Odin? In that case, which one should I flash?
Any help would be appreciated a lot.
Thanks

franzasensi said:
I'm having the same problem with a newly acquired handset. I have full signal on some places and nothing on others, unfortunately in my house I have no signal! So it's quite exasperating.
My baseband version is I9195XXUCNE6
Android version is 5.0.2 with 3.4.0-cyanogenmod-g92aec50 [email protected] #1 kernel
Cyanogenmod version is 12-20150306-UNOFFICIAL-serranoltexx
Would it help if I flash a separate modem file through Odin? In that case, which one should I flash?
Any help would be appreciated a lot.
Thanks
Click to expand...
Click to collapse
If you have warrenty left then you should go to customer service then they will change your mainboard. and it would bw okay.

Network and WiFi signal poor

Hi guys,
Today my girlfriend got s4 mini i9195 international lte version.
The phone is on 4.2.2 and i noticed that the signal is very poor on network.
On my s3 i have full 4 bars while she has none/1 bar, also the wifi disconects sometimes, it says it is connected but it doesn't load anything, it needs to be switched off and on again.
The phone is brand new unrooted.
Is it due to bugs in 4.2.2 (i don't know i don't follow s4 mini forum just s3).
I also tried software update but it says it's the latest (lying obviously).
Also to mention, sometimes the SystemUI restarts and wallpaper goes black. Is that another bug?
Any help is appreciated, cheers.
Sent from my pebble blue scoobie doo using Tapatalk.

Bump.
Can anyone say if it is normal at least? I'll figure out then what to do..
Sent from my pebble blue scoobie doo using Tapatalk.

if you are a stock guy with no mods just stock go to sammobile and find your countrey\its area and download its firmware and flash it but backup before doing so ... the black wallpaper comes when the systemui.apk crashes ... there must be a dirty cache or something

rrgrrg said:
if you are a stock guy with no mods just stock go to sammobile and find your countrey\its area and download its firmware and flash it but backup before doing so ... the black wallpaper comes when the systemui.apk crashes ... there must be a dirty cache or something
Click to expand...
Click to collapse
Everything is fully stock.
It doesn't have any new firmware for my carrier, but it has for another carrier in my country, can i flash this firmware, both are for i9195.
And another question, i don't have many knowledge in KNOX, so to ask, can normal flashing via Odin activate KNOX, or flashing via Kies?
Sent from my pebble blue scoobie doo using Tapatalk.

Try making sure bluetooth is off.
My S4-Mini cant do both at the same time, and I have had 2.

Toje2 said:
Try making sure bluetooth is off.
My S4-Mini cant do both at the same time, and I have had 2.
Click to expand...
Click to collapse
Bluetooth was off, but NFC was on maybe he was getting a problem, or i'll just have to accept that it has weaker antennas than s3.
Also, will flashing a stock firmware via Odin activate Knox? Because it's on 4.2.2 now and would like to upgrade to 4.4.2 (but i read many want to downgrade).
Sent from my pebble blue scoobie doo using Tapatalk.

I guess its just weaker then,
Going back to stock should not activate knox, it did not when I did it to flash a new radio.

[Q] Messed up my Tab S 10.5, no wifi cant flash stock firmware

Not sure where and what I have done wrong.
I wanted to root my Tab S 10.5 (SM-T800), so used Odin v3.07 also tried with 3.10.6 using CF-Auto-Root-chagallwifi-chagallwifixx-smt800.tar and also tried CF_AutoRoot_Port_T800_BeansTown106.tar but rendered my WiFi useless, it just constantly scans, says saved secured, lit in blue signal, tried 2G and 5G, no luck.
Next I tried to put back to stock firmware T800XXU1ANF8_T800XAR1ANF6_HOME.tar but gets so far then just fails.
It is a new UK Samnsung Galaxy Tab S 10.5 UK.
I am novice so please be gentle regarding tech talk lol.
SuperSU v2.01 Chainfire Installed fine
I would prefer rooted with wifi, failing that i want to go back to stock
Any help appreciated

djpleasure said:
Not sure where and what I have done wrong.
I wanted to root my Tab S 10.5 (SM-T800), so used Odin v3.07 also tried with 3.10.6 using CF-Auto-Root-chagallwifi-chagallwifixx-smt800.tar and also tried CF_AutoRoot_Port_T800_BeansTown106.tar but rendered my WiFi useless, it just constantly scans, says saved secured, lit in blue signal, tried 2G and 5G, no luck.
Next I tried to put back to stock firmware T800XXU1ANF8_T800XAR1ANF6_HOME.tar but gets so far then just fails.
It is a new UK Samnsung Galaxy Tab S 10.5 UK.
I am novice so please be gentle regarding tech talk lol.
SuperSU v2.01 Chainfire Installed fine
I would prefer rooted with wifi, failing that i want to go back to stock
Any help appreciated
Click to expand...
Click to collapse
The only thing i can suggest is ironrom 1.8 , its an original stock touchwiz 4.4.2 but rooted plus an amazing kernal at its heart and runs faster and better than the original.....i had a problem whenvflashing roms so tried this as last resort ahd it solved everything.
EDIT
Heres the link http://forum.xda-developers.com/galaxy-tab-s/development/prerooted-stock-touchwiz-rom-t2973107

djpleasure said:
Not sure where and what I have done wrong.
I wanted to root my Tab S 10.5 (SM-T800), so used Odin v3.07 also tried with 3.10.6 using CF-Auto-Root-chagallwifi-chagallwifixx-smt800.tar and also tried CF_AutoRoot_Port_T800_BeansTown106.tar but rendered my WiFi useless, it just constantly scans, says saved secured, lit in blue signal, tried 2G and 5G, no luck.
Next I tried to put back to stock firmware T800XXU1ANF8_T800XAR1ANF6_HOME.tar but gets so far then just fails.
It is a new UK Samnsung Galaxy Tab S 10.5 UK.
I am novice so please be gentle regarding tech talk lol.
SuperSU v2.01 Chainfire Installed fine
I would prefer rooted with wifi, failing that i want to go back to stock
Any help appreciated
Click to expand...
Click to collapse
Any joy fella?

pdolton2000 said:
Any joy fella?
Click to expand...
Click to collapse
wifi started to work again for some strange reason, however did try to update rom twrp with the rom you suggested, but it fails to install.

djpleasure said:
wifi started to work again for some strange reason, however did try to update rom twrp with the rom you suggested, but it fails to install.
Click to expand...
Click to collapse
What error does it give after failing on all these installs...is it "/system" error or does it say something else?
I had problems with twrp refusing every rom...then i got an img file of philz touch and installed that using another app and rebooted and installed a rom from philz touch recovery and boom it actually installed the rom....i can gife you expanded info on dl links and names of software if you want it pal

Mobile data not working +STOCK ROM

Hi everyone,
I have LG G3 d855 (Europe version). I bought it online, not at any network. I had an lollipop update really fast (Poland). Yesterday I rooted the phone, it worked fine, and installed the BlissPop rom. I missed the Quick Circle option though, so today I installed the ChupaChups rom for lollipop. And now my problem: The mobile data connection is not working. I can make calls, send texts, connect via wifi, but the data connection over the network is not working at all. I went back to stock - I downloaded and installed the European version using kdz method, it didn't help, so I did it over LG Flash Tool. It still does not work. Do you have any ideas, what to do with this? I feel like I'm going to cry, I'm very nervous about it, because I use mobile data almost all the time...
Maybe there's something wrong with the modem driver? I really hope someone is able to help me. Thank you in advance!
Edit: Maybe I used the wrong stock rom? I don't even have the option to update to lollipop anymore.

CaPlanePourMoi said:
Hi everyone,
I have LG G3 d855 (Europe version). I bought it online, not at any network. I had an lollipop update really fast (Poland). Yesterday I rooted the phone, it worked fine, and installed the BlissPop rom. I missed the Quick Circle option though, so today I installed the ChupaChups rom for lollipop. And now my problem: The mobile data connection is not working. I can make calls, send texts, connect via wifi, but the data connection over the network is not working at all. I went back to stock - I downloaded and installed the European version using kdz method, it didn't help, so I did it over LG Flash Tool. It still does not work. Do you have any ideas, what to do with this? I feel like I'm going to cry, I'm very nervous about it, because I use mobile data almost all the time...
Maybe there's something wrong with the modem driver? I really hope someone is able to help me. Thank you in advance!
Edit: Maybe I used the wrong stock rom? I don't even have the option to update to lollipop anymore.
Click to expand...
Click to collapse
Seems like a modem baseband was flashed somehow.
Flash the modem back to the correct stock version you had and it should fix the problem

tiguy99 said:
Seems like a modem baseband was flashed somehow.
Flash the modem back to the correct stock version you had and it should fix the problem
Click to expand...
Click to collapse
Do you know where I can find those modem drivers?
Edit: I checked which version of software I should use with my IMEI no. It's 20h. Would it be enough to flash the stock rom over kdz, or do I have to find somewhere the modem driver for this version? If yes, do you have any idea where can I find it?
Thanks.

CaPlanePourMoi said:
Do you know where I can find those modem drivers?
Edit: I checked which version of software I should use with my IMEI no. It's 20h. Would it be enough to flash the stock rom over kdz, or do I have to find somewhere the modem driver for this version? If yes, do you have any idea where can I find it?
Thanks.
Click to expand...
Click to collapse
Not sure.
I have the G2 and we have these files in our Development Section where you find ROM files etc.
Should be there as flashable zip files in the same section for the G3

tiguy99 said:
Not sure.
I have the G2 and we have these files in our Development Section where you find ROM files etc.
Should be there as flashable zip files in the same section for the G3
Click to expand...
Click to collapse
Ok, thanks! Last question before I do the final step - I have the ROM I am supposed to have. I rooted the phone, installed TWRP. I've also found the modem driver for my rom. And the question is - how should I flash the driver? Should I mount system or do anything apart from just installing the zip? Should I clear any cache?

@CaPlanePourMoi Wipe the modem partition in Recovery and then just flash the modem zip which will replace it. If that doesn't work, you can go back to BlissPop that includes it's own Modem and install Xposed for 5.1 Super-Alpha and the QuickCircle Mod for AOSP, all 3 of those I'm using with no issues whatsoever!

So I installed the modem driver (20h) yesterday, but it didn't help. I decided to install the BlissPop ROM, and mobile data (with LTE) works just fine. I will go back to the problem on Saturday and keep you up to date. Thanks!

Update
Update: Hey everyone - it seems like I didn't find any solution. I tried to go back to the ROM based on stock again (it was Cloudy this time), but the modem still didn't work. It was acutally working for a few seconds (I had 4G connection), but then again it was lost and it didn't connect anymore. Wifi works fine. Do you have any ideas on how I can flash the modem correctly? And how can I uninstall the modem that I have now in recovery? I didn't do that, because I cannot find this option.
Thanks in advance!

CaPlanePourMoi said:
Update: Hey everyone - it seems like I didn't find any solution. I tried to go back to the ROM based on stock again (it was Cloudy this time), but the modem still didn't work. It was acutally working for a few seconds (I had 4G connection), but then again it was lost and it didn't connect anymore. Wifi works fine. Do you have any ideas on how I can flash the modem correctly? And how can I uninstall the modem that I have now in recovery? I didn't do that, because I cannot find this option.
Thanks in advance!
Click to expand...
Click to collapse
I have a very similar issue
my LG G3 is the D855 on AT&T , and was working fine on Cloudy 2.2 or 2.3 Lolipop without any issues!
All of a sudden last Friday 5/22/2015, mobile data stopped working, but WiFi is still okay.
I just did a full wipe, updated APN, and the issue still there
I haven't change any major things in probably 2 months, not sure what's going on.
Finally, contacted AT&T, and made sure that they remove from the network,a put my back(troubleshooting). As well as changing the sim, and APN, but nothing worked!!
PLEASE HELP!!!!!!!!!!!!
UPDATE: So my last attempt, I contacted my provider AT&T, and they requested to try a default APN settings, even though what I used was working fine.
I did, and immediately my mobile data was back!!
Everything is working back as normal, and for some reason the network APN required updating

Did almost the same few days ago! I have finally solved my problem. Here's the explanation:
In Poland we had a network called "Era", a few years ago it was bought by T-Mobile. I searched the internet for T-Mobile APN settings in Poland and it didn't work. I have also found the APN settings for the old network, "Era" and surprisingly it's working. I don't know why T-Mobile settings don't work while they do for other people (and at this point I'm too afraid to ask. )

HI, i have the same problem on my d855 with wind (i'm in italy), i was rooted with custom rom and when i came back to stock i lose data connection. What i have to do? what do u mean for restore default apn? the default of my carrier? or the default for g3?

[Q] OTA Weirdness - Tab Pro 10.1

Got a notice of an OTA last night. Figured it was for Lollipop so told it to proceed. Once the tablet rebooted the WiFi radio was disabled. Looked in settings which showed that WiFi was on, but no radio. Went online an saw that Samsung hasn't sent out the Lollipop update for the 10.1.
Question 1 - how do I restore my tablet since I can't get WiFi turned on?
Question 2 - where did this weird OTA come from?
Thanks for any help you can give.
Mike

mikethevol said:
Got a notice of an OTA last night. Figured it was for Lollipop so told it to proceed. Once the tablet rebooted the WiFi radio was disabled. Looked in settings which showed that WiFi was on, but no radio. Went online an saw that Samsung hasn't sent out the Lollipop update for the 10.1.
Question 1 - how do I restore my tablet since I can't get WiFi turned on?
Question 2 - where did this weird OTA come from?
Thanks for any help you can give.
Mike
Click to expand...
Click to collapse
Firmware for SM-T520 http://www.sammobile.com/firmwares/database/SM-T520/ select your country and download.
Instructions
Extract (unzip) the firmware file
Download Odin v3.10.6
Extract Odin ZIP file
Open Odin v.3.10.6
Reboot Phone in Download Mode (press and hold Home + Power + Volume Down buttons)
Connect phone and wait until you get a blue sign in Odin
Add the firmware file to AP / PDA
Make sure re-partition is NOT ticked
Click the start button, sit back and wait few minutes

Others having same issue
Thought I'd post this as info. Checked over at Android Central and several people appear to be having the same issue. Looks like bad firmware from Samsung. Bad build number is: KOT49H.T520UEUAOD1. Wiping and factory refresh may help temporarily, but eventually the wifi radio will be disabled. I'm going to wait for Samsung to get their act together and flash a fresh build when it's released.
Thanks for the help.
Mike

My 10.1 Tab Pro was updated too but wifi is working fine. I'm not rooted though. Same build number that you mentioned.
Sent from my SM-T520 using XDA Premium HD app

Wifi Issue as well
I had the same update come across last night and now I can't connect to wi-fi to save my life. Really pissed off. Done 2 factory resets already, reset my modem at home, turns out it happens everywhere and not just at home. Wifi says it's on but doesn't pick up any networks in my area and won't connect to the 1 that is already known on my tab. PLEASE HELP

Got the update last week. Wifi is fine but now daily I get a random reboot. Never had any problems before. Thanks Sammy!

Bad Firmware
mikethevol said:
Thought I'd post this as info. Checked over at Android Central and several people appear to be having the same issue. Looks like bad firmware from Samsung. Bad build number is: KOT49H.T520UEUAOD1. Wiping and factory refresh may help temporarily, but eventually the wifi radio will be disabled. I'm going to wait for Samsung to get their act together and flash a fresh build when it's released.
Thanks for the help.
Mike
Click to expand...
Click to collapse
I have the same issue with the build described.
Does one know how to correct this firmware update if the tablet is unable to connect to the internet?

AndroidSMT520 said:
I have the same issue with the build described.
Does one know how to correct this firmware update if the tablet is unable to connect to the internet?
Click to expand...
Click to collapse
You can download an earlier firmware from sammobile.com. If you are in the US, use the firmware for cellular South and make sure it's a 4.4.2 that you are downloading. After you download it, you can flash it with Odin. There are several threads here on xda that describe this process. If you still need further help, post again.

TabPro 10.1 SM-T520, v4.4.2 Build KOT49H.T520UEUAOD1 No wifi after update
Boy am I glad to find you guys with the same problem as I have. Couple of days ago I saw an update message and decited to go for it. Well, as all of you know, wifi stops working. Factory resets gets it working again but once everything is restored it stops working again! This is quite frustrating and I hope Samsung is working on a fix right now. I haven't been on XDA for a while and only rooted phones before. So how is the rooting/mod scene for tablets. Any good Custom Roms out there we can use until/when this is resolved? I'm good with directions and done some custom roms on my phones before. Let me know what's the good ROMS out there are...the bloatfree version is a welcome even without KNOX, I don't really use it.

k8108 said:
You can download an earlier firmware from sammobile.com. If you are in the US, use the firmware for cellular South and make sure it's a 4.4.2 that you are downloading. After you download it, you can flash it with Odin. There are several threads here on xda that describe this process. If you still need further help, post again.
Click to expand...
Click to collapse
Thanks for your feedback.
I had to use the firmware from November 2014 to get it to work and restore my wi-fi.
Again thanks

KOT49H.T520UEUAOD1 is the problem
Well I figure this particular firmware has a problem. Because even after factory reset, wifi works once and goes back to not working. So the best solution is to get an earlier version. I went back to Sep 15, 2014 version and it works well. Took forever to download from sammobile though. So if you need to flash to a previous version that works. I have post a link to the firmware I have on my OneDrive that got it working again, hopefully it will be faster for you to get your tablet working again. Here is a link. This is for the US Tab Pro 10.1 SM-T520.
T520UEUANI1_T520XARANI1_XAR.zip
https://onedrive.live.com/redir?resid=a628a551d04c1283!721&authkey=!ALKYL7IcLyekSgg&ithint=file,zip

thank you for those who warned about the wifi problems this OTA introduced. I'm just going to keep ignoring the tablets request to update. I thought i got a great deal on this tablet when i got a refurbished one for under $300 several months ago... but samsungs lack of support for this tablet is astonishing.

nxp3 said:
Boy am I glad to find you guys with the same problem as I have. Couple of days ago I saw an update message and decited to go for it. Well, as all of you know, wifi stops working. Factory resets gets it working again but once everything is restored it stops working again! This is quite frustrating and I hope Samsung is working on a fix right now. I haven't been on XDA for a while and only rooted phones before. So how is the rooting/mod scene for tablets. Any good Custom Roms out there we can use until/when this is resolved? I'm good with directions and done some custom roms on my phones before. Let me know what's the good ROMS out there are...the bloatfree version is a welcome even without KNOX, I don't really use it.
Click to expand...
Click to collapse
i'm being prompted to install a 83.54 mb update, i dont know if its the bad OTA you list or if its a new one. Anyone have any idea what it is?