Mobile Data Connection issue(s) after flashing & downgrading - Galaxy Note 3 Q&A, Help & Troubleshooting

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

Related

Restore to stock however no wifi or cell

I purchased a note 3. The previous owner modified the phone (rooted) and screwed up the whole thing there was not wifi or cellular. Checked the firmware and it said custom. I figured I could reset the phone to stock and use it normally. I located the firmware from sam mobile and flashed through Odin. The flash went of no errors ( so I believe I picked the right firmware however still no wifi and I get the not registered on network when I put in my SIM card? Shouldn't the appropriate kernels and modem be installed with the stock firmware? Checked the imei number is appears ok however the software shows a different number than the sticker on the back of the phone. At this point I am out of ideas. Has any one ever experienced this?
I have the Canadian note 3 SM-N900W8 model and flashed the following
Country/CarrierDateVersionPDAKies
Canada (Bell Mobile) 2013 November 4.3 N900W8VLUBMJ4

[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 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

HELP I broke my LTE

First off I'm using an unlocked S5 on straight talk's LTE network, have been for about 9 months with no problems. I've talked to support twice and they reactivated networks and all that good stuff, and when none of that worked sent me a new sim, which I have just activated and it still didn't fix my problem - so I'm finally bringing my issue here.
Last week I decided to update from phoenix rom oc4 (I think it was oc4) to optimal rom og5 (15-5). Anyway I was hasty in flashing and messed up, so just went back to stock ncg > root > full wipe > flash firmware, rom, kernel, firmware again just to be safe. The rom works fine except I seem to have lost my data connection. The 4G icon still shows, but it's not filled in - as you can see in the screenshots. To make it even more strange, when I check the network and sim card in apps like Advance Signal Status and Sim Manager, I still seem to be getting a connection to 4G but there is just no data flowing. The only error I can see is in phone info, when I run a ping test, I get PingIpAddr: Fail: IP addr not reachable which you can also see in the screenshots. It would appear this is my problem but I don't know where to go from here. I'm going to start flashing different versions of modems, starting with oc4 to see if that helps. Then I'll probably try different roms, but I've flashed other roms trying to fix this and even restored the backup to when it worked and it still didn't fix my problem. Did I wipe my IP address or something maybe? I am in CDMA/LTE mode, and the vzwinternet apn is selected.

[SOLVED] IMEI and baseband unknown - unrooted device

Hi all,
My SM-G935F is not rooted and it has been bought network unlocked.
Yesterday I was browsing normally in 4G, the device became very slow and suddenly a message popped up "please insert SIM card". I have done the normal procedures of restarting and wiping cache partition which did not solve the problem.
In the meantime, I have tried the SIM on another device and it has worked properly.
I've noticed that the fields IMEI and IMEI DV are displayed as "Unknown".
I have searched for solutions but, because my phone is not rooted I'm not sure whether it applies to my case. Please note that I've made no change that could cause this issue, it has simply happened.
What could be causing this?
Try to reinstall the stock via odin. Maybe that will solve your problem. If not, it may be a hardware problem.
Dark Stranger said:
Try to reinstall the stock via odin. Maybe that will solve your problem. If not, it may be a hardware problem.
Click to expand...
Click to collapse
Thanks. I have installed latest firmware via ODIN successfully. However it did not solve the problem.
Baseband is also displayed as unknown.
If it is an hardware issue,is it repairable?
BLZ83 said:
Thanks. I have installed latest firmware via ODIN successfully. However it did not solve the problem.
Baseband is also displayed as unknown.
If it is an hardware issue,is it repairable?
Click to expand...
Click to collapse
99% of the time, its a mobo replacement for this issue if it ends up being hardware related, and if a mobo replacement doesnt fix your issue, not much else will. Might as well strap it to a missile if a mobo swap doesnt fix it
SOLVED
Right, the problem has been solved for now.
I have taken multiple steps which have got me confused TBH, but I will try to recall them in detail:
(please note that before these steps I have attempted to flash latest firmware G935FXXS7ETA4 at least 3 times without CSC home before rooting)
1. I have rooted with CF Auto Root hero2lte
2. I have copied EFS, radio and nv_data.bin to a safe location in my PC.
3. Used latest TWRP flash.
4. Flashed latest firmware G935FXXS7ETA4 with Home CSC and that did not work.
5. Flashed latest firmware G935FXXS7ETA4 CSC only and after restarting a message popped up informing that the single SIM mode had been switched to DUAL SIM mode, and network signal was back on.
6. I have installed the app "phone info" which now indicates baseband version and original IMEI. Happy days!
Notes:
On the phone info app I get the following information displayed
Device Type:
hero2lite
Product Name:
hero2ltexx
Is it possible to change this back to the original name?
UPDATE
UPDATE
- Sometimes it switches from 4G to 3G ("E" symbol). 4G comes back on if I restart on safe mode.
- It disconnects from the network randomly, then it comes back on.
- Everything else works perfectly fine.
This is clearly an intermittent issue, could it be the modem hardware failing?

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