yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Android Development] RussianBear:
I don't see why it wouldn't. Also don't see why they would put two different radios in this phone. Try it out :)

Stock radio is at least 6-7 dbm worse than the n4 hybrid radio I'm on. Any recommendations?
[Nexus 5 Android Development] drpelpi:
Anyone tried this? I am very interested since I bought the phone in the US but I will be using it in Spain.
[Nexus 5 Android Development] autoprime:
I would just say, "experiment"

back up your efs first... before flashing any modem. tuck the efs backup away somewhere.. then flash different modems to see which modem works best for your needs.
[Nexus 5 Android Development] Shaldy:
The main question is - if I flash the d821 modem on d820, would european LTE bands work? Or is this kind of things hardware-limited.
[Nexus 5 Android Development] GTDarthYoda:
So I download the EFS file flash it and it creates a backup?
[Nexus 5 Android Development] RussianBear:
that's the idea. if they've used the same hardware in both versions, then you can have a truly world-wide phone.

---------- Post added at 02:27 PM ---------- Previous post was at 02:25 PM ----------

Yup. You will have the EFS folder show up in the root of our ext-sd directory. Mine had 2 images and then a zip file with the same images, flashable via recovery of your choice.

Multi-quote is broken for me...
[Nexus 5 Android Development] Shaldy:
Maybe some smart people could look at these FCC documents to determine if hardware is really the same?

d821:

https://apps.fcc.gov/oetcf/eas/repo...mFrame=N&application_id=753395&fcc_id=ZNFD821

https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=2067868

d820:

https://apps.fcc.gov/oetcf/eas/repo...mFrame=N&application_id=395625&fcc_id=ZNFD820

https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=2037440

I have skimmed through them and didn't find anything useful. They did test d821's band 5 and 7 in US though.

Also available: Service Manual for d821, with very specific info about LTE bands signal paths on the mainboard:

https://docs.google.com/file/d/0B7VNhP6LbXNmdl9wZG1OSTBnVUE/edit?usp=sharing

EDIT:

Okay guys, I think I got it:

So look at this mainboard https://d3nevzfk7ii3be.cloudfront.net/igi/RjDwm5mLe1P5KbpO.huge (Source: iFixit), this is d820, 16Gb.

Now look at this one: http://i.imgur.com/y09c0fi.png (Source: LG Service Manual), this is d821, 32Gb.

Got it? It's very hard to see, because the resolution on d821 is s***, but you can see, that there are labeled resistors (or are they resistors?) on the mainboard.

Left: 821, Right: 820

Is this it? One small resistor?
[Nexus 5 Android Development] drnizeguy:
Yeah and if you switch the 16gb to 32gb, you get free extra storage ;)
[Nexus 5 Android Development] Shaldy:
You wish :) NAND flash is different on two boards, but wireless chips sure aren't.
[Nexus 5 Android Development] iyousif:
I guess you're after something, is there any Qualcomm engineer in the house?
[Nexus 5 Android Development] gee one:
I would think that maybe the chip is the same, but the antennas would be different. So maybe the radios could swap, but the reception would be poor with the mismatched radio? Maybe someone would be brave enough to try it?
[Nexus 5 Android Development] Lownita:
Didn't the nexus 4 have a efs partiton or why did no one bother? I only know this from my SGS2 days.
[Nexus 5 Android Development] autoprime:
I'm not 100% sure but if I had to guess... I'd say that even swapping modems will not give you extra bands.. at least when it comes to LTE. I'd guess that the actual antennas are lacking in each version.

But that's what experimenting is for. You cant break your phone by flashing a different modem. I'd stick with Nexus only modems(D820/D821). Some hybrid modem modders may be able to pick parts from G2 modems.. can't say for certain though. The Nexus 4 has hybrid modems.. using parts from different mako radios and lg optimus g radios. Ex: here

As long as you have a backup of your EFS(make sure you have at least one backup OFF of the device)... you will be able to mess with the modem without fear of the modem messing with your EFS. Usually a messed up EFS is the result of a custom rom flash or a hybrid modem tweaking nv items it shouldnt be. If that were to ever happen.. you can restore the EFS backup by booting into recovery and all is fixed.

/ramble
[Nexus 5 Android Development] pwc realtor:
Anyone tried the older modems for the D820 and seen improvements in signal?
[Nexus 5 Android Development] casonswag:
Twrp lets u backup efs in recovery
[Nexus 5 Android Development] RussianBear:
Not yet. I've flashed both of the earlier ones and they're about the same. It doesn't get nearly as hot as n4 did when reception is poor. Major plus.

Edit: oddly enough, hspa+ is faster than lte at our house. 1900 reframe helps,I guess :)
[Nexus 5 Android Development] CRIME INC.:
This thread should be stickied.

sent from my HAMMERHEAD neXus
[Nexus 5 Android Development] 75markus:
confirmed 807f95b809df0630668e10d3ed029306 :)
[Nexus 5 Android Development] LOU7illest:
How do I get my efs backup off the phone, no file managers see the folder so I can't move it so I can drag it off using a PC
[Nexus 5 Android Development] DelBoy:
What if I switch EFS between two Nexus?

Will they work normally, will they adopt new IMEI and other info from EFS backup?
[Nexus 5 Android Development] RussianBear:
Don't. If you read back a little, people are having all kinds of issues.
[Nexus 5 Android Development] logikism:
maybe a noob question,is it unlocked?
[Nexus 5 Android Development] PhillyCheez:
Use Root Explorer or some file manager with root access and copy and paste it to the "SD card" partition.
[Nexus 5 Android Development] logikism:
maybe a noob question, is it unlocked?
[Nexus 5 Android Development] LOU7illest:
I tried root explorer and still can't find it
[Nexus 5 Android Development] PhillyCheez:
/data/media/EFS_Backup

that's where mine backed up.

I backed up using this zip file and I am using root explorer.
[Nexus 5 Android Development] Dougshell:
Looking forward to the new modem
[Nexus 5 Android Development] nikon120:
Wasn't this thread stickied before?

Awaiting 4.4.2 radios. :)
[Nexus 5 Android Development] M.Noury:
4.2.2 does not include Radio. It is a small camera update about 1.7 mb
[Nexus 5 Android Development] richport29:
Is it possible to go from .23 down to .15 using ADB?

Using this code adb fastboot flash radio radio.img
[Nexus 5 Android Development] Phateless:
Why don't you just flash the factory image from Google?
[Nexus 5 Android Development] ddloco:
I said i did in the first sentence

Sent from my Desire HD using Xparent Green Tapatalk 2
[Nexus 5 Android Development] DaveinSoCal:
The only draw back on this phone is that phone signal is nowhere near comparable to my S2. I know that this is all trial and error, but is there anyone here that is using one of these modems/radios in Southern California (Fullerton/Anaheim)? If so, how have your results been?

---------- Post added at 10:33 AM ---------- Previous post was at 10:26 AM ----------

Same radio, it was just a camera update.
[Nexus 5 Android Development] :
I'm getting decent results on most recent modem with ATT/ST in Los Angeles.

Sent from Nexus 5 on Slimkat
[Nexus 5 Android Development] LNJ:
Signal bars across phones manufacturers are not representative of the actual signal level. Check the dbm level and ignore the bars especially if you know that you are in an area where you should have a higher reception than what is indicated by the signal bars.
[Nexus 5 Android Development] jd1639:
What is a "good" dBm level?
[Nexus 5 Android Development] LNJ:
Smaller numbers are better. I don't really have any reception issues so you will have to check with others in your area. For me, 100dbm LTE is about 2 bars.
[Nexus 5 Android Development] jd1639:
I have -107 with one bar. I think the -107 is good
[Nexus 5 Android Development] bitdomo:
Can anyone do a MD5 checsum for the efs1.img and efs2.img from the backed up efs.zip file? Both modemst1 and modemst2 partitions has the same size. I have a feeling that these two are the same.

If you look at the partition table you can see aboot and abootb partitions has the same size, rpm and rpmb partitions has the same size, tz and tzb partitions has the same size and so on. It turned out these two partitions in pairs has the same MD5 checksum so they are the same. I get these images from a factory firmware.

I cannot check the modemst1 and modemst2, since I dont have the nexus 5 yet
[Nexus 5 Android Development] warhead1978:
efs1

76bdb040edf017a25455348e8135c525

efs2

a2f3ce0e4027cbb47bd8ca02a9c5e25b
[Nexus 5 Android Development] RussianBear:
That's pretty bad, actually (I get similar low signal in my house also). Full bars start around mid 80s.
[Nexus 5 Android Development] ink718:
Would this need to be flashed every time if you do a full system wipe?
[Nexus 5 Android Development] 75markus:
radio ?

no, radio & bootloader are not touched by a full wipe
[Nexus 5 Android Development] ink718:
In the OP, its mentioned that TWRP makes a backup of this during a nandroid backup. So it makes sense that a system wipe would wipe it, no? I hope your knowledgeable in this area and not giving me an answer because you "think" you know. No offense but I seen people on XDA trying to give to be helpful and answer questions from their "personal" believes and not facts. Once again no offense to you, I just want a clean true/fact answer. =)
[Nexus 5 Android Development] jd1639:
Twrp makes a efs backup only if you tell it to. It does not do it by default. Wiping does not wipe the efs partition, it wipes the system partition
[Nexus 5 Android Development] Dougshell:
Am I missing something or had the new modem still not been posted?
[Nexus 5 Android Development] autoprime:
new modem has been posted multiple times in the past 10 pages or so. i took one of the links and added to the OP.

I wont be adding it to my repository until I get the modem direct from LG.
[Nexus 5 Android Development] patsimeon:
Hi, I'm just wondering, this is the bootloader for 4.4.2? Because I OTA upgraded from 4.4 to 4.4.2 but my bootloader says HHZ11d. Let me know if you think I should flash this. Thanks!
[Nexus 5 Android Development] adichandra:
Is it possible to downgrade the radio? Because since the new radio, i have been experiencing loss signal and a restart that is the only way to fix it.
[Nexus 5 Android Development] jwhyte:
Just grab the zip and flash it.
[Nexus 5 Android Development] autoprime:
KOT49E modem directly from LG finally added to OP.
[Nexus 5 Android Development] 75markus:
HHZ11k is the new one ... perhaps something failed with your OTA update

of course you can flash the new one if u like
[Nexus 5 Android Development] Jur1nator:
Flashed back to Baseband .17 way better reception than .23
[Nexus 5 Android Development] adichandra:
Agreed. I found .23 losing my signal and not coming back till i reboot the phone. Sucks
[Nexus 5 Android Development] tylerdurden83:
Excuse my ignorance but I see that you only mention team win recovery in the op. Can the efs autobackup zip be flashed with cwm too? Thanks!
[Nexus 5 Android Development] adrman:
Yes. That's how I did it. It worked perfectly.
[Nexus 5 Android Development] safendi:
D820 KOT49E radio it's also for d821?
[Nexus 5 Android Development] melbourne408:
Yes both models are included for that modem
[Nexus 5 Android Development] JoaoPaulo:
If i flash KOT49H modem in my D280, it would work with european LTE bands?

If not, what modem should i Flash?

Ps: Using Android 4.4.2
[Nexus 5 Android Development] movielover76:
Rooted and installed custom recovery just for the old .17 modem at this point. So much better :) highest speed test I've ever gotten on T-Mobile and this radio is much better in low signal areas.
[Nexus 5 Android Development] jcsww:
Further proof why rooting your device is pretty much essential for the best experience. I will definitely put that radio on my internal SD when heading back to VA in February.
[Nexus 5 Android Development] movielover76:
Yea I actually wanted to stay stock, because I like the nexus 5 experience the way it is, but the horrible modem included with 4.4.2 for me had to go. I've rooted and installed a custom recovery on every android device I've owned so it was bound to happen at some point lol.

Also now I can remove the tethering block :)
[Nexus 5 Android Development] jcsww:
Although having a custom recovery installed is nice, you can also leave the stock installed and just use fastboot to boot to a custom recovery when needed. It's a bit more of a challenge to do that but just being rooted means you can still receive OTA's. After having a difficult time getting the 4.4.1 to install from using the Nexus Toolkit to flash CWM and root my device originally, I flashed it fully back to stock with the Google image and did everything through the SDK so I don't run into those issues ever again. For me, that is the best way to preserve stock while still having a rooted device and access to the custom recovery of your choice.
[Nexus 5 Android Development] mikebeatrice:
If we flash the EFS backup, should the resulting files always have the same MD5? First thing I did after getting the phone was unlock, flash recovery and then flash this. I rebooted, copied the files off, booted to recovery again, ran the backup flash a second time... and none of the MD5s match. I wasn't expecting that.
[Nexus 5 Android Development] harlenm:
Which is the original modem that came with the at&t version? I have a newer one installed and I don't think it works as good as the original. I backed up the original, but don't know how to restore it.

thanks
[Nexus 5 Android Development] melbourne408:
KRT16M_LGD820

(Edit: Download that modem from the OP and reboot in recovery.

Go to your download folder and flash the modem. Then wipe dalvik/cache & reboot.)

Sent from my Nexus 5
[Nexus 5 Android Development] autoprime:
efs is always changing and therefore gives you diff md5. keep the first backup somewhere safe and you're good.
[Nexus 5 Android Development] treIII:
So to reassure myself the D820 is the US model. So I can download all 5 radios and use dBm from network signal info to see which gives the lowest dBm therefore the best signal reception? Correct? Thanks

Sent from my Nexus 5 using Xparent Blue Tapatalk 2
[Nexus 5 Android Development] maidenboston:
that is correct.

.15 and .17 give me the best results...

i been using .15 for like a week.

giving .17 a try again and seeing for comparison
[Nexus 5 Android Development] movielover76:
Battery drain

I'm still testing, but has anyone else noticed a constant battery drain after installing the .17 modem on an otherwise stock,rooted 4.2.2

Still stock kernel and everything.
[Nexus 5 Android Development] enzippo:
Where i can download d821 4.4.2 radio.zip? Thanks!
[Nexus 5 Android Development] maidenboston:
did you even read anything anywhere?!

they're the same

your welcome
[Nexus 5 Android Development] enzippo:
Sorry. I mean the newest radio introduced with 4.4.1
[Nexus 5 Android Development] maidenboston:
either way...

same answer i gave above..

did you read any of the posts before asking your question? i'm just curious how it works...

the first post has all the info you need pretty much...

the radio that was included with 4.4.1 has been giving bad results for some folks out there...
[Nexus 5 Android Development] Demonic240:
I'm not sure what may be causing it, but I'm seeing complete signal drops for 5-30 seconds. Looks like maybe when switching from LTE. Tried .20, .17 and .15 but seeing the same thing. Is this supposed to be normal behavior?
[Nexus 5 Android Development] GavinMazey:
Been happening to me on .20 and sprint. Probably going to do some testing of .15 and .17 where I don't remember it happening before.
[Nexus 5 Android Development] jlevy73:
Anyone remember which one is .15?
[Nexus 5 Android Development] :
Hi,

This one:

So in the download page choose this one: LGD820_KQS81M_RADIO.zip or LGD820_KQS81M_RADIO.img.

:)
[Nexus 5 Android Development] jlevy73:
Thanks a lot, much appreciated.

Maybe next time reading the OP might be beneficial :)
[Nexus 5 Android Development] coolek33:
Hey guys. I need help or some tips. My phone shut down himself. And now twrp says my data is encrypted. It doesn't see Internal memory and there is no imei after boot. Efs partition is broken somehow probably. I have backed it up with twrp earlier. How can I make a flashable zip of it like the one from the OP? Can someone help me with this or maybe there is another way to fix it? I tried restoring 4.4.2 with Wug's Nexus root toolkit but no success. Someone gave me his backup and adviced to change my efs1.emmc.win to efs1.img and paste it there. Is it safe to flash this? My twrp backup below.
[Nexus 5 Android Development] Tommymac1039:
What radio are you using
[Nexus 5 Android Development] coolek33:
H8974a-1.0.25.0.23

Edit: sorry : M8974A-1.0.25.0.23
[Nexus 5 Android Development] coolek33:
Can someone please make a flashable zip of my twrp backup. Fastboot doesn't work for me so I can't flash stock image.
[Nexus 5 Android Development] jd1639:
You need to get the usb drivers working properly. Google "Android naked usb drivers" and try those. Can't you flash your backup in twrp?
[Nexus 5 Android Development] coolek33:
Just did. I don't think it's Efs anymore. Maybe twrp is broken. Can someone post his backup of recovery (twrp 2.6.3.4)?
[Nexus 5 Android Development] jd1639:
If you need a flashable twrp 2.6.3.4, here's one http://d-h.st/YpG
[Nexus 5 Android Development] coolek33:
Didn't work. Restarts recovery. Need backup. Or maybe earlier ver.
[Nexus 5 Android Development] autoprime:
you dont need a flashable zip to restore EFS. there are commands in the OP to flash via adb shell.

while in TWRP assuming efs1.img and efs2.img are on the root of your internal storage(/sdcard)

adb shell

dd if=/sdcard/efs1.img of=/dev/block/platform/msm_sdcc.1/by-name/modemst1

dd if=/sdcard/efs2.img of=/dev/block/platform/msm_sdcc.1/by-name/modemst2

if your issue is something else.. try formatting data. In TWRP select Wipe > Advanced wipe > select data > swipe.

This will wipe data and your internal storage but may get rid of the encrypted data message you got.

Like others before me.. I suggest you also get fastboot working. It's an invaluable tool.

Lets not derail this thread tho.. if your issue is not EFS related(adb shell commands above will fix it if so) please start a new thread.
[Nexus 5 Android Development] coolek33:
Thanks for reply. But U got me wrong. Fastboot is working fine but flashing isn't. It flashes only boot.img the rest fails. Drivers are installed. Twrp can only wipe (format data) but it doesn't help. I've restored my Efs from USB otg but it didn't helped. I think motherboard is broken. Flash memory maybe. Baseband is unknown and there is now internal memory and imei. If I flash the radio for example it stays like it was. One last chance for backup of recovery from someone and the phone goes through the window :p
[Nexus 5 Android Development] niv3d:
Hey guys question. I installed multirom and it worked fine for a day. Then I flashed a 3rd ROM and can only get LTE on my primary cataclysm ROM which is also my default nandroid. Every other ROM I flash I'm only getting H and H+ :\ I have toggled LTE preferred in the settings with no change. Any ideas? No LTE on Beanstalk Official nor Purity
[Nexus 5 Android Development] autoprime:
gotcha. and what do you mean "backup of recovery" ?a twrp backup? as in someone elses system/data? not likely that will work.

you could maybe try wiping some other partitions?

while in recovery..

adb shell

dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/cache

dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/metadata

dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/userdata

dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/misc

dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/system

then pushing a rom to internal storage

exit

adb push romname.zip /sdcard/

then flashing new rom... rebooting and hoping for the best.

if that doesnt work.. try booting into download mode and flashing a stock .tot file.

d/l mode - http://xdaforums.com/showpost.php?p=48444617&postcount=19

stock .tot - http://xdaforums.com/showthread.php?t=2515760

lg flash exe and dll - http://xdaforums.com/showpost.php?p=48309298&postcount=12

directions on how to use LG Flash(read the ENTIRE OP.. just use nexus .tot and dll instead of vzw) - http://xdaforums.com/showthread.php?t=2448960

this is how phones are repaired if you sent it into LG(if hardware isnt damaged)
[Nexus 5 Android Development] treIII:
Since I have rooted my phone it seems like my data speeds have slowed down. I've flashed a few different Roms. 3 to be exact. I've also flashed a few different radios. Could my efs be contaminated? And I'd so what would be the pepper procedure in order to clean up and make sure that my phone is back to tip top shape. I don't mind to put it back to completely stock if this is necessary. But I wonder if it gets put back to stock if it will actually fix the efs if it is contaminated. I have m my efs backed up in several places in the cloud and on a computer. Any guidance would be much appreciated. And thank you

Sent from my Nexus 5 using Xparent Blue Tapatalk 2

Sent from my Nexus 5 using Xparent Blue Tapatalk 2
[Nexus 5 Android Development] LucidSomnia:
Is this all about only LTE? i just bought an american version to use it in europe. I guess 3g will work fine?
[Nexus 5 Android Development] Raistlin1:
This has started happening to me and I am on .17, I see my signal go blank a lot lately and I also am unable to make calls at times. I am on the latest OTA but I reverted to the old radio because of the signal. I am also experiencing call drops because of this.

I have also noticed that on .17 it will say connected to LTE but I cannot get any data, I have to manually switch to 3G and then my data works. I reverted to this modem because of the signal it has but I think I need to try the latest modem if it means my phone will switch to 3G instead of holding onto LTE and no data.

Someone correct me if I am wrong, but I don't see the .img file for the .23 radio in the OPs link, I just see a zip and I don't have a custom recovery. So I need the img file so I can flash using adb.
[Nexus 5 Android Development] jcsww:
You can extract the img file from the zip and flash that through ADB. I find the two best radios for me are the .15 and the .23 but I've been using the .23 since the last update.
[Nexus 5 Android Development] Raistlin1:
Thanks, I forgot about extracting the img from the zip. Running .23 now and will leave that on for a week to see how it is around my town and at work. Hopefully it won't drop as much as .17 did and also not hold on to LTE when there is no data and drop to 3G.
[Nexus 5 Android Development] XtraWho:
Going to try 15

Now can I flash any of those radios to any version of the N5 or are they specific to device? (GSM, CDMA)

Thankd
[Nexus 5 Android Development] jcsww:
All radios for the 820 and 821 work on all devices. If you need CDNA, stick to the 820 radios as that seems to be missing with the 821. The bands picked up by the radios differ between the 820 and 821 but the hardware for the radio is the same regardless of what Nexus 5 you have.
[Nexus 5 Android Development] samersh72:
just to be sure, size of backuped imgs is around 3 mb each?
[Nexus 5 Android Development] rolear8:
Had my N5 for one day.. Just checking with you guys if I have the latest modem
[Nexus 5 Android Development] TomTcom:
Yes you do. Look at the ending .23 of your baseband version. Now go to the op and find that full number and you'll see it's the latest.
[Nexus 5 Android Development] Demonic240:
I've done some testing, and if I set my network mode to 3G, then I never lose a signal. Upon some research, it appears that someone was able to fix the dropped signal when switching FROM LTE by changing their network mode in *#*#4636#*#* to LTE/GSM/CDMA. I've tried making that change, but can't get it to stick as it keeps reverting back to LTE/GSM. I updated my build.prop, but I think I need to do a factory reset for it to take effect.

This is on T-Mobile using the .23 modem.