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[Q] After 4.4/NAE update, only EDGE is working... 3G crashes on GSM

Background:
- Sprint L720
- International unlocked with GSM SIM
After updating to a new 4.4 ROM (Slimkat) and NAE (modem only from the modem thread), connecting to anything other than EDGE causes, what seems to be, a modem crash. If I force "GSM only"/2G connection, it's stable with EDGE. If I try to connect to 3G, I see "3G" quickly flash on the status bar next to the signal indicator (I have full service), and then the whole mobile connecting drops and resets... then it goes back to having full service, but no data connection at all - until I got to mobile settings and set it back to "2G" and it goes back to stable EDGE.
I am overseas with the phone (it's fully unlocked and I got a strong H+ connection with the old CM ROMs at the same location), so I am wondering if it's an issue with the new 4.4 ROMs not supporting GSM? Perhaps some sort of baseband/modem mismatch? I also flashed NAE (modem only) as well when I did the ROM - I have since downgraded, but perhaps it isn't fully downgrading?
I applied the MF9 full one-click, no joy ... I did a factory wipe and applied the 4.2 factory image from SamMobile, no joy...
Looking at the logcat, I see something along the lines of an error for 'Mobile network type unknown: 0'...
Any help would be greatly appreciated - only having EDGE is driving me nuts, especially when my actual mobile network here is very fast..
Let me know of any information I need to provide - Thanks

Ok, update - I applied the MK2 modem and then NAE, as I saw someone else do because they said that the NAE file is missing some things... no joy
This all seems to have happened after applying the NAE modem-only file - Does SlimKat not support GSM? I don't think it's SlimKat, because, even going back to the fresh "Factory default" flash that I got some SamMobile, I still had the same issue..
Which leads me to what I think the problem is - the Qualcomm settings. Those seem to be persistent across all ROM restores, so how do I go about resetting the QUALCOMM settings to default? Is there something I can do with EFS Professional/CDMA Toolbox or something?

[Q] i9505 Connection issues after flashing Phoenix rom

Hi all,
I have recently flashed my phone with Phoenix rom v9.0 upgrading from an older version omega rom. The installer went through without an issue but when it boots up it won't connect to the mobile network(vodafone australia). If I go to settings>more networks>Mobile networks>Network operators it searches and connects to vodafone and will work until the screen turns of then it disconnects.
In the install instructions it says if you lose connection when screen is off flash with latest kitkat modem. I found this thread: http://forum.xda-developers.com/showthread.php?t=2192025
And flashed via Odin modem XXUGNF1. And still get the same issue. Please help!!

It's usually because you are on the old bootloader and are using a incorrect modem. If you are on the old bootloader you need a specific modem to work with Android 4.4.2. Im not sure which one though. You have to search for it.

Thanks will search for correct modem... If no such luck would just flashing the new bootloader fix this issue. Is losing the ability to downgrade the only dissadvantage to doing so?

I have flashed heaps of modems and still keeps cutting out on screen off. I have also tried to find a csc file for my country and carrier and no luck. Thinking of just jumping in and flashing the newest bootloader and modem to see if that fixes the problem. Is voiding the warranty the only issue with knox or will it stop me from flashing new custom Roms down the track?

[Q] i9505 LTE modem flash issue

Hi all,
I've had my phone locked on Tele2 (CRO) network which I needed to unlock to be able to use T-mobile SIM. I've used Odin 3.04 and followed the instructions to update modem to I9505XXUFNB9. I've managed to unlock the network this way and use my new SIM but the connection (both phone and mobile data) kept switching on and off constantly.
After that I've tried another firmware, namely I9505XXUFNDG for T-mobile but the problem now is that mobile is almost always off with no possiblity to connect and WiFi is blocked completely (security notification "Your device's security has blocked an action").
Basebands registered properly after every flash.
Phone is not rooted and me not being a power user would just love it to work as it was intended to
Followed the guide, all firmwares downloaded from here
Appreciate any help.

Might be onto something. After reading through this post seems I need to apply WiFi fix but I cannot tell which one to use for my phone (I9505XXUFNDG) as it's not posted. Kernel version 3.4.0-481100.
I've tried I9505_WiFi_FIX_MDM.tar and I9505_WiFi_FIX_MDF.tar but they just messed up the phone completely.
Thx a lot.

impaelas said:
Might be onto something. After reading through this post seems I need to apply WiFi fix but I cannot tell which one to use for my phone (I9505XXUFNDG) as it's not posted. Kernel version 3.4.0-481100.
I've tried I9505_WiFi_FIX_MDM.tar and I9505_WiFi_FIX_MDF.tar but they just messed up the phone completely.
Thx a lot.
Click to expand...
Click to collapse
Hi ,
you should flash the fix for the modem you have installed , try following:
Flash another modem from the list there
Now flash the modem wifi fix for that modem
If still in trouble re flash stock and start all over again.....

MAX 404 said:
Hi ,
you should flash the fix for the modem you have installed , try following:
Flash another modem from the list there
Now flash the modem wifi fix for that modem
If still in trouble re flash stock and start all over again.....
Click to expand...
Click to collapse
Thx, did just that and now it works properly.
Much obliged.

a problem started to show recently; when i select LTE/WCDMA/GSM for auto connect network mode when the mode switches due to signal availability it doesn't get reconnected. i.e. while under LTE it works fine but if i move and get out of reach it should automatically switch to slower network which it doesn't. this works fine if i select WCDMA/GSM then the switches are fine but LTE is not available under this.
one more thing i noticed since i'+ve flashed the phone is that the upper part of the phone gets very very hot (a lot more than before). since the flash i've also had to replace a microSD card which died within weeks (not necessarily connected but worth noting).
any suggestions welcome.
Android: 4.4.2
Baseband: I9505XXUFNB9
Kernel: 3.4.0-481100

Mobile Data Connection issue(s) after flashing & downgrading

Current status- Note 3 running stock 5.0 Lollipop and root is unavailable. No Mobile Data connectivity
Model SM-N900T (Tmobile) Baseline - N900TUVUFO86
Story- Three days ago I updated from 4.2.2 to Lollipop 5.0 . Shortly thereafter issues appears such as not being able to set PIN security.
Factory resets didn't help. Re-flashing again with 5.0 (BTW, all done through Kies) resolved the issue but other issues appeared. Mobile data connectivity via Tmobile was lost. Couldn't select a Tmobile network- times out. APN is correct + all other settings. I downgraded the phone back to 4.2.2 hoping it would correct the issue but not. Still no mobile data connectivity. Tmobile in-store tech were no help. IMEI appears intact when viewed through *#06#- matches the back of the phone; however, when looking into the details (*#0011#) I see a IMEI FAIL CERT -4. Besides this issue everything else is perfectly fine.
My thoughts are the modem needs to be re-flashed via odin. I found one specifically for Tmobile Note 3 US (from around 2013) on this site. It's a BIN file which I've compressed to a TAR ( suppose I could flash the BIN using phone in odin too). I need some advice here if flashing this modem is the right thing to do. If not, any other suggestions?
Thanks

oneplus 2 stuck on setup no wifi or cellular signals after unbricking

so let me tell u waht happened and how
few days back i just flashed nougat rom (i think it was cm 14.1 nightly ) after it i flashed h2os modem radios for volte and after it tried band locking via network signal guru after locking bands my device automatically rebooted after all that hell there was no volte so i got back to freedom os based on oos3.1.0 the network was resetting again and again so i flashed cm14.1 again but it was rebooting time after time so got back to freedom os again and got stock recovery installed via twrp and boom my op2 got bricked with having
bootlogo on pressing power button and there was fastboot mode too , i got it unbricked via meathod posted by @namanbhalla on oneplus forum (meathod 1 ) i got stock recovery back and installed oos 3.0.2 using adb but after rebooting there was no wifi signal coming and cellular network was gone too i tried updating it by installing full oos 3.1.0 but it failed and after it tried installing oos 3.0.2 it too failed but 23 mb update of oos3.1.0 succeeded but there was same problem of no signals and after skipping it there was add name window arrived i filled everything but next button was not working this meant again stuck on set up and tried hard reset but nothing happened and in all cases mac address was 02:00:00 like something plz help me to get my op2 normal

Flash h2os modem again
Same thing happens with me also I just reflashed the modem agin and my network and WiFi are back also I am able to complete the startup setup

remix abhishek said:
Same thing happens with me also I just reflashed the modem agin and my network and WiFi are back also I am able to complete the startup setup
Click to expand...
Click to collapse
i am having stock recovery

Got everything solved but there are network refreshes again and againg

use network signal guru
sanyam mehta said:
Got everything solved but there are network refreshes again and againg
Click to expand...
Click to collapse
download a apllication network signal guru from play store it will fix the network refresh issue , select and and lock band 40 for best speed and band 5 for best coverage