yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Android Development] leblvin:
I looked into that at that time. From what I learned, the data isn't stored in a way that is readable to a human. I tried opening the EFS backups with a HEX editor, but nowhere could I find the IMEI / MEID (in decimal or HEX form). It's mostly low level instructions, and were talking programming skills that are WAY out of my league. Knowing how the program created the EFS backup won't help either (OP tried to help me, to no avail).

I know I sound pessimist, but after trying for 2 weeks you kind of make up your mind on the subject. I'm not saying it is impossible, but AFAIK, there are no tools available to fix this other than resetting the phone with hardware equipment.
[Nexus 5 Android Development] :
Really, the device is so new... You should just revert to stock and RMA it, as last poster said. You are going to drive yourself crazy.

Sent from Nexus 5 (?) on Slimkat
[Nexus 5 Android Development] Mechashiva:
We seem to have followed the same path. I've been at this two weeks or so, tried the hex editor on the EFS backup tool and TWRP img files. No luck, can't find the string. I suppose I'll just watch the forums, someone more knowledgeable than I will find a solution, or the local shops will figure out how to do it.

RMA isn't an option, I'm trying to modify a stock NV item. And yes I'm driving myself crazy. On the plus side I've learned an awful lot about adb, fastboot, img files, hex editing, SPC codes, MSL codes, and the XDA forums.

Thanks to both of you.
[Nexus 5 Android Development] leblvin:
If you're trying to modify a WORKING phone, then RMA is not an option.

If you're trying to REPAIR a phone you accidently screwed up (like I and a few other XDAers did), then RMA. You won't have any issues, as long as you bring back to stock and relock.
[Nexus 5 Android Development] jd1639:
And why would he be trying to modify a working phone unless it's for nefarious purposes?
[Nexus 5 Android Development] leblvin:
This is where I was going to, but in a less direct manner ;)
[Nexus 5 Android Development] Johnny424:
does anyone know if the dec16th radio in downloads is newer then the oct19th radio listed as .23?
[Nexus 5 Android Development] Mechashiva:
I assure you my purposes are neither nefarious nor illegal. Thank you both for your help, I'll let you know if I make any progress.
[Nexus 5 Android Development] nebulah:
Okay guys is there any difference at all flashing the zip and going the fastboot way ? been trying to get on to .15 and I get bootloops everytime until I reflash rom or restore. Can't figure out what's wrong. Checked md5s too...
[Nexus 5 Android Development] bigpapanl:
I wanted tot backup the EFS but the download site isn't working. Do you have a mirror?

Verstuurd vanaf mijn Nexus 5 met Tapatalk
[Nexus 5 Android Development] autoprime:
server is in the process of moving. I'd ask that no one mirrors the file please.

if you need an alternate in the meantime.. my LG G Flex efs thread has full manual steps... you could technically flash the zip in the thread as well... as the G2, G Flex and Nexus 5 all have the same EFS names.

http://xdaforums.com/showthread.php?t=2635881

:good:
[Nexus 5 Android Development] bigpapanl:
I understand, wel after waiting a while i've just downloaded the file from the opening post :D and i should better be patience now.....
[Nexus 5 Android Development] sagi4422:
Int.

Hi Guys,

My first post in XDA.

So far I had many disconnections in my area and the H+ to 3G skips were very slow.

I read almost all this thread and finally decided to check if the modem is the issue.

My stock was .23 820.

Changed to .15 820 and no change in signal (HSDPA)

Changed to .17 821 and the signal was improved (GPRS).

I will make some tests in the upcoming days but at least as I see at my house (where I almost have no reception) the reception is better.

Need to check whether GPRS is fast enough....

Some photos attached.
[Nexus 5 Android Development] aavvaallooss:
What app are you using in the photos?
[Nexus 5 Android Development] fredphoesh:
Thanks, It's useful to have someone else's experience... I am not happy with the signal strength on my N5, just not as good as my SGS4... which I sold... but dont want to start messing with modems UNLESS there is DEFINITELY some evidence that there are ones that are better than the stock radio that came with 4.4.2 KOT49H
[Nexus 5 Android Development] :
Hi,

He use this one I think: https://play.google.com/store/apps/details?id=de.android.telnet.

:)
[Nexus 5 Android Development] metayoshi:
For anyone with a Sprint Sim in their Nexus 5, apparently, the good folks over at S4GRU have discovered that the .15 modem is great for finding Spark (LTE Band 41) enabled locations, but it's not able to switch back to CDMA properly so you'll miss texts and calls.

So for anyone in a Spark launched city and can't wait for the supposed OTA to get Spark enabled on our Nexus 5's, you can go ahead and flash the .15 modem. Just make sure to flash back to the latest one for actual phone usage.

Here's an amazing result someone got in San Francisco, which from my knowledge, doesn't even have Sprint's normal LTE Band 25 launched there yet.

http://s4gru.com/index.php?/topic/4989-lg-google-nexus-5-users-thread/page-215#entry280879
[Nexus 5 Android Development] sagi4422:
Thats correct :)
[Nexus 5 Android Development] evilbobvu:
I sold my S4 for the Nexus also. I love everything about the phone but the signal is definitely worst comparing to the S4. I'm on the latest modem.
[Nexus 5 Android Development] fredphoesh:
Yeah, love the physical look and feel, the smoothness of kitkat, getting G-latest first... but I guess there had to be some compromises for a phone costing nearly half as much. Im curious to see if samsung can make a phone that has zero lag, its a small thing but paging through apps in the app drawer should never jerk into motion... such a basic thing makes it feel inferior to erm, iSH1TE ;)
[Nexus 5 Android Development] ChazzMatt:
So, you are on "23" radio.

Many have reported older modems -- "15" & "17" -- work better. Try it. If you don't find the improvement, flash back.

_______

Sent from my Nexus 5 (LG-D820)
[Nexus 5 Android Development] MinatoNamikaze:
can i back up my EFS since i'm already on custom rom, custom kernel ?
[Nexus 5 Android Development] autoprime:
sure. you can back up your efs at any time.. but the sooner the better.

you just want to have a solid backup made before anything can go wrong. as long as you are experiencing no issues then EFS is still good.

if you start to experience issues related to a bad EFS.. THEN back up.. well then obviously it's too late ;)
[Nexus 5 Android Development] MinatoNamikaze:
how can i know if my EFS is on bad state?
[Nexus 5 Android Development] autoprime:
is your phone functioning properly? if so.. its not bad :cool:

you will know when EFS is bad. :D
[Nexus 5 Android Development] MinatoNamikaze:
thanks.. dude..
[Nexus 5 Android Development] coolek33:
U will have no imei and phone will not see it's internal storage for example. But it can also mean a hardware issue.
[Nexus 5 Android Development] manfio:
i backup my efs with the zip file and i have this....

this is normal right?

why the year is 1970? :|

see the screenshot please
[Nexus 5 Android Development] coolek33:
U backed it up with TWRP? Then this is normal.
[Nexus 5 Android Development] :
I have EE in the uk, which one should I use?
[Nexus 5 Android Development] port76:
can somebody post me a link to the stock 4.4.2 modem i think its 23 in used to Samsung phones so a bit confusing thanks guys

---------- Post added at 02:31 PM ---------- Previous post was at 02:25 PM ----------

pls can someone post me a link for the stock 1.0.25.023 modem pls thanks guys
[Nexus 5 Android Development] bartolinio:
[MENTION=3559917]port76[/MENTION] the link is on the first page

edit: http://downloads.codefi.re/autoprime/LG/Nexus_5/Modems (KOT49E)
[Nexus 5 Android Development] port76:
so KOT49E is the stock nexus 5 23 radio

---------- Post added at 03:34 PM ---------- Previous post was at 03:33 PM ----------

not KOT49H
[Nexus 5 Android Development] bartolinio:
there is no KOT49H modem
[Nexus 5 Android Development] port76:
thanks for your help friend
[Nexus 5 Android Development] gd6noob:
nice... I should try all the modems when Im near the end of my billing cycle and use up the rest of my data on my plan.. haha
[Nexus 5 Android Development] tien113:
I try to test the original modern KRT01B 4.4.

the radio in 4.4.2 is so terrible. It dropped signal frequently. I don't know how Google can create it.
[Nexus 5 Android Development] Sc4ryB3ar:
Does anyone know why Google didn't release a new radio with this last Rom?
[Nexus 5 Android Development] koriflame:
Is there a way to back up EFS if you're using CWM?
[Nexus 5 Android Development] dr_w:
verizon bands..

I'm curious if flashing the D821 modem will allow some verizon action in, perhaps flashing the g2 modem. Anyone interested in trying?
[Nexus 5 Android Development] Face1ess:
Guess n5 cant be bricked by flashing various modem img, so - can sm1 check it? To be sure - can i make d821 model from d820.
[Nexus 5 Android Development] Yuriy.Samorodov:
Sorry for the noob question.

Is this correct, that if get D821 modem and flash D820 with then theoretically we will make D821 work in European LTE (I mean band 7 [MENTION=3164596]2600[/MENTION] Mhz of course)
[Nexus 5 Android Development] imfloflo:
On the box of my nexus 5 i can read :

So 2600 is already supported by the D821 ?
[Nexus 5 Android Development] Froid:
Great info...thanks!
[Nexus 5 Android Development] bamboosensei:
If anyone could help me with this, I would be so appreciative. I ordered an RMA for my Nexus 5 because of some dead pixels and took a nandroid on my old Nexus 5 using TWRP. I didn't actually know that the newest versions added EFS backup and I ended up restoring the EFS backup onto my new RMA'd phone. Now my phone returns an IMEI of 0 and effectively I can't use it as a phone. Does anyone know if there is any way I can restore the previous IMEI or am I effectively screwed and have to RMA again?
[Nexus 5 Android Development] Jigen90:
Nothing new, here.

D821 International version supports LTE band 7, that commonly is on 2600 MHz.

It is correct

http://en.wikipedia.org/wiki/List_of_LTE_networks
[Nexus 5 Android Development] sxp:
first post donwload

link

different

d821 and d820 modem zip and img file

but no different last version same

d821 zip working d820 and vice versa

hw different LTE limitation

maybe only one resitor

but thean clear only try modofication resistor d820 positon d821
[Nexus 5 Android Development] Lancez:
tried to backup EFS using twrp but there's no zip created in data/media or sdcard, any ideas? however, when i use CMW it did create a EFS backup zip. not sure which one is the right method.
[Nexus 5 Android Development] ridobe:
It will be in your TWRP folder along with an md5 file.
[Nexus 5 Android Development] Lancez:
i checked TWRP folder but there's no zip file at all. do i need to enable compression in backup menu?
[Nexus 5 Android Development] jd1639:
They're not zips, just take the whole folder that was created and store that somewhere safe. Twrp creates a nandroid
[Nexus 5 Android Development] Lancez:
i see, since i prefer CWM i did flash the backup zip from OP and flashed it thru CWM, i got EFS_Backup folder contains efs1 and efs2 image files along with efsbackupflashable zip. can i use this as backup too or it has to be created by TWRP?
[Nexus 5 Android Development] ridobe:
That was a temporary fix until TWRP added it to their backup options. If you have 2.6.3.2, you have that option. Not sure if CWM has it. The flashable zip is superfluous.
[Nexus 5 Android Development] Lancez:
i backed up both of them just in case. thanks
[Nexus 5 Android Development] autoprime:
the "efsbackupflashable zip" file is your EFS backup. This is what you want to backup somewhere off of your actual device. You can rename it if you want. if you ever have EFS issues in the future you can put it back on your device and flash/install the zip in custom recovery(CWM/TWRP). Hopefully the backup is never needed :p
[Nexus 5 Android Development] italia0101:
I thought backing up EFS was really only something you needed to do on a Samsung device as they were stupid enough to put it somewhere that it could actually get deleted ...

wasnt needed with the Nexus 4... dont see why it would be for the Nexus 5 .. ? unless someone can enlighten me

for example .. this is the exact thread i posted about a year ago ... check it out :

http://xdaforums.com/showthread.php?t=2003518
[Nexus 5 Android Development] Lownita:
That is exactly what I was thinking.
[Nexus 5 Android Development] bosna110:
hopefully T-Mobile can get some LTE towers in Des Moines Iowa and few other places in Iowa. Im averaging anywhere from 12-16 MB Download and 1.7-2.9MB Upload on HSPA+
[Nexus 5 Android Development] y2whisper:
Was just to fix bugs with 4.4.1. Came out shortly after the 4.4.1 release.
[Nexus 5 Android Development] [XIX]Secutor:
Hi guys, little problem here!

I've installed the zip with CWM, but I'm unable to locate the backup folder. I've already searched in /sdcard and in data/media but there isn't.

EFS_Backup is only visible from CWM flash.zip menu, and it actually seems locate in /sdcard, but it's above /sdcard/0/, and i dont' know how to access this directory.

Any hints?

PS: I'm with the stock rom, root, CWM
[Nexus 5 Android Development] jd1639:
Look in /storage/emulated/0
[Nexus 5 Android Development] [XIX]Secutor:
Done, but it isn't there; as you can see from the image however, it doesn't seem locate in sdcard/0

It's weird, because if I use adb to open /data/media

i can see the EFS_backup folder, but whenever i try to adb pull i obtain this
[Nexus 5 Android Development] jd1639:
I

Do a adb devices first. You'll need to confirm it on your phone
[Nexus 5 Android Development] [XIX]Secutor:
Done, but nothing changed; adb says "device not found" only when I type "adb pull blabla",but other than that, i can still use all the other functions

EDIT:

Nevermind, i've tried with adb remount instead of adb shell and it worked :)

Now, how can I get rid of the EFS_Backup folder still in data/media?

EDIT2:

Already done with rm -rf string
[Nexus 5 Android Development] dferg:
ok sorry for stupid question but ive read upto page 20 and couldnt find an answer........

do you need to download both the zip and IMG files? and put them both onto my phone for flashing?

do i just flash the ZIP file in TWRP and then reboot?

i need to try these out because im losing data connection every 5-10mins and have to disable / re-enable mobile data to get it working again even though it always shows with full bars and H sign.

thanks in advance
[Nexus 5 Android Development] :
Hi,

dferg, if you want to flash a new radio via recovery, download only the zip file. Flash, reboot and it's done...

The .img file is to flash the radio via fastboot...

:)
[Nexus 5 Android Development] chris41g:
Is there any phone you don't tinker with auto?
[Nexus 5 Android Development] evemir:
Hi, I'n new here on this part of XDA. I'm from Poland and planning to buy N5 USA, because my friend is going there on delegation. What is the status of this modem thing. In Poland we have band 3 of LTE. Will D820 work at LTE here after flashing different modem? Or not? Or is it work in progress?

For me ~40% total higher price in europe is not worth having working LTE, I don't need it that much with only 2GB per month. But still it would be nice to have it.
[Nexus 5 Android Development] bartolinio:
[MENTION=4493195]evemir[/MENTION] D820: LTE will not work in Poland

PL: w Polsce (ani nigdzie w Europie) nie będzie Ci działało LTE jak kupisz model D820, i nic, również zmiana Radia, tego nie zmieni ;)
[Nexus 5 Android Development] evemir:
PL: Trudno. Tak jak mówiłem, super ważne dla mnie to nie jest. Przynajmniej zapłacę za tel 1250 a nie 1800...

EN: Well, It didn't matter that much anyway.
[Nexus 5 Android Development] coolek33:
Są tańsze ;)
[Nexus 5 Android Development] Tylog:
Thanks for the modems , the latest one 0.23 is horrible for me , I use now 0.15 and it's much better :)

Tapatalk Team SlimRoms Nexus 5
[Nexus 5 Android Development] qwahchees:
Does anyone have any information on which modems work better and more efficiently? Preferably for the battery life of the cellphone + a good connection? Thanks!
[Nexus 5 Android Development] bartolinio:
old one is better, in my location ;)
[Nexus 5 Android Development] qwahchees:
The 78N modem?
[Nexus 5 Android Development] bartolinio:
sorry

I have not noticed that you're from Toronto, I meant about the D821 :)
[Nexus 5 Android Development] danial.aw:
I personally tried all 3 radios and did not notice any significant benefit with the older ones ...

---------- Post added at 05:30 PM ---------- Previous post was at 05:29 PM ----------

Wish there was a way to enable LTE bands though kind of annoyed I can't get any 2600
[Nexus 5 Android Development] Haidary.T:
Can someone help me? I can't understand this thread still :/ After I got my device, I unlocked the bootloader, flashed stock 4.4.2 image and then I

installed cataclysm rom. Should I still backup my EFS? I don't install any tweaks if that matters.

Thanks!!
[Nexus 5 Android Development] :
Hi,

To be safe, yes because you never know what might happen...:

But it's up to you...

:)
[Nexus 5 Android Development] kwamayze:
No signal on 3G

My nexus 5 mobile network works fine in 2G but I get no signal when I switch to either 3G or LTE. I have flashed different radios but still have the problem. I'm restored my backup from an old nexus 5 16GB to my current one, 32GB. I'm also on elementalx kernel. Don't know where the problem is from. Please help
[Nexus 5 Android Development] kwamayze:
I think i flashed a the EFS of the old nexus 5 unto the new one and now my IMEI is either zero or wrong depending on the twrp backup i flash with. 2G network works fine but 3G/LTE doesn't work at all. Please help
[Nexus 5 Android Development] aavvaallooss:
I think you are screwed unless you've a backup of the original EFS folders
[Nexus 5 Android Development] spinal2k:
I'm having poor bluetooth experience.

Does flashing any of these affect bluetooth ( are we flashing a piece of hardware containing all three wifi, BT and gsm/lte modem ) ?
[Nexus 5 Android Development] toocool4all:
Same here but I don't have backup so ?

Sent from nexus 5 SENSONIC HD rom
[Nexus 5 Android Development] WarRaven:
So, simply put, Your hosed!

WR

Sent from my Nexus 5
[Nexus 5 Android Development] aavvaallooss:
Try to flash last factory image from Google Developers. If unsuccesful you need send the phone to Google/LG in my opinion

https://developers.google.com/android/nexus/images#hammerheadkot49h
[Nexus 5 Android Development] coolek33:
http://xdaforums.com/showthread.php?t=2515760

Maybe flashing with LG flash tool from here will help. But be careful.
[Nexus 5 Android Development] bosna110:
I wonder when a new modem will be up available for use
[Nexus 5 Android Development] spinal2k:
Flashing .15 on a d821 i get 4G in areas where i used to have only 3G.

My two cents
[Nexus 5 Android Development] Sc4ryB3ar:
How is the modem switching between WiFi and LTE and LTE and 3g?
[Nexus 5 Android Development] spinal2k:
I haven't tested thoroughly that specific switch, however, at work i don't have 4G and switching from 3G to WIFI went smoothly (at least i didn't had any problems, the switched just happened)...But i will pay more attention when switching form 4G to 3G and give you my feedback later.
[Nexus 5 Android Development] coolek33:
Witch one do U use exactly? Did you flashed the one from d820 krt01b?
[Nexus 5 Android Development] Sc4ryB3ar:
I would very much appreciate that, thank you :)

Also, which of the .15's did you use?
[Nexus 5 Android Development] spinal2k:
I think there is only one on the OP. It has two files to choose from IMG and ZIP, difierence is on the "installation method"... i used the zip file and flashed over TWRP.

I have a D821 with baseband .17 and i used the D820 firmware .15

I installed the following:

D820 KRT01B (4.4)

M8974A-1.0.25.0.15

AAAAANAZQ1025019

by QUALCOMM Incorporated Oct 29 2013
[Nexus 5 Android Development] Haidary.T:
Can anyone tell me if it's too late to backup EFS? I unlocked my bootloader,flashed Rastakat and Trinity kernel. Is it possible that something in the EFS messed up or am I being too paranoid?
[Nexus 5 Android Development] aavvaallooss:
Never is too late
[Nexus 5 Android Development] bartolinio:
look at my signature ;)
[Nexus 5 Android Development] coolek33:
Ehh tapatatalk :p
[Nexus 5 Android Development] TecQuality:
Guys, is this the latest baseband? Or r2 comes with a new one? Thanks
[Nexus 5 Android Development] pilotmills:
Guys, is this the latest baseband? Or r2 comes with a new one? Thanks

Baseband .23 is the latest.
[Nexus 5 Android Development] spinal2k:
Here's my feedback over the weekend testing:

I found no problems in 4G to 3G transition, 4G to wifi transition or 3G to Wifi transition or vice-versa for each

in 3G to 4G transition, in areas where i only had 3G, i have very low 4G coverage and speedtest app shows 3G speeds ( even though it says 4G in the signal icon )

There was one time that i completely lost "mobile data". I don't know what happened but the G/E/H/4G sign on the signal icon was not there and when i tried to open a web page or instagram i got the error "no connection available". This was the first time i saw this and i got the N5 since launch. I'm on EE and last wednesday EE was down from 6pm till the following morning, maybe this situation was still based on this, i don't know.

The mobile networks in the UK are very unreliable if you don't live in London or in a "city center" (in my case, Oxford). It's hard for me to give you an exact comparison in my most frequent places i'm at but i think i have "worse" 3G coverage (i can't be absolutely sure as i haven't performed these tests with the other baseband).
[Nexus 5 Android Development] crazycage:
should I flash??

Hello,

I have a question regarding the modem/baseband.

I am on Mahdi-Rom (which is awesome by the way!) and I occasionally experience random dropouts of my signal/data connection. The status bar icon shows an empty triangle and it says "Not registered on Network" even though I've manually registered through settings (and even tried auto detect). Also, at totally different random times, I am seeing "Emergency calls only" on the lockscreen even though the network IS connected and the icon shows it to be so.

I am experiencing these issues on multiple ROMs such as Carbon too which is why I'm here asking. I have never flashed a MODEM or tampered with the stock one that came with my device when I bought it.

Right now, in Mahdi-rom, my about page shows this info:

Android Version 4.4.2

Baseband version M8974A-1.0.25.0.23

Build Number KVT49L

Does anyone think flashing a modem would help my situation at all and if so, which one do I flash?? I have made backups of my EFS a long time ago so hopefully flashing a modem won't ruin anything... or is it better to sideload factory firmware and start all over??

Please advise! I find it hard to believe it would be a ROM issue unless its a known universal bug...
[Nexus 5 Android Development] refedit:
Hey guys.

I have in Recovery twice efs1 and efs2 under Mount-> format. Why?
[Nexus 5 Android Development] peecs121:
I'm experiencing the same issue.

Super powered Nexus 5 running Mahdi/ElementalX
[Nexus 5 Android Development] samersh72:
there is 2 efs partitions for N5

DO NOT format.
[Nexus 5 Android Development] cbond007:
My stock rom on sprint, the LTE works fine but when I flash a rom the LTE doesn't work, only 3g. It does this when I restore my stock efs. Any ideas?
[Nexus 5 Android Development] spinal2k:
I have this problem as well. I have network, i see my network provider on lock screen and below i see "emergency calls only".

I've been having this on my previous ROM Cataclysm and now on PA 4.2 Beta...