yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Android Development] vn00914361:
Idk what these modems are for. I mean, aren't Nexus 5 already supporting LTE?
[Nexus 5 Android Development] GtrCraft:
What? The updated modems are for better signal etc. Not for adding LTE, that's hardware
[Nexus 5 Android Development] kingston73:
Think of the modem as the software side of the hardware radio signal components. That's a simplified version. DIfferent modems will work better for different carriers and different areas of the world.
[Nexus 5 Android Development] ChazzMatt:
Also called "radios". Back during the gen3 Galaxy Nexus days we eagerly awaited new OS releases with new radios as it meant they incorporated Google's latest research about grabbing and holding on to a signal. On that XDA thread we were able to decipher Google's code to see how "new" the radio was, when it was built. Even the newest 4.4.4 r2 radio (released mid-July 2014), although ostensibly aimed for Southeast Asia region has had many positive comments from USA users. It is the last KitKat radio that will be released.
[Nexus 5 Android Development] kingston73:
I've read throught the last 10 or so pages and I'm wondering what people are doing to encounter so many problems? Am I just very lucky? I've never had any issues flashing a modem before but reading all these problem posts make me a little nervous to change things. I'm on the 3rd to last modem right now, the .17 one from june or july or whenever.

If I've been reading things right the L modem is working well for at least some people, with or without using an L rom, correct?
[Nexus 5 Android Development] inSaN1Ty_X:
I'm running 4.4.4 ROM. These drops seem really random. Last week I had to reboot like 4 times a day. Now I'm on Mahdi 2.7. No drops on L radio, but idle drain is horrible.
[Nexus 5 Android Development] kingston73:
There's only 1 single L preview that I know of, and my GPS has worked fine for all the ones I've tried. The only modem I have yet to try is the L preview.
[Nexus 5 Android Development] iPsychoGeek:
Man, my GPS can't lock. Do you know what should I change?
[Nexus 5 Android Development] EvanA:
GPS lock is a known issue with this phone. I have trouble getting lock as well sometimes. Not much you can do except hope that L fixes it.
[Nexus 5 Android Development] iPsychoGeek:
I'm an Ingress player. And I had awesome GPS for like 8 months since buying phone.

Right now I can't remember what do I changed to broke GPS. I'm trying to figure out what can I do.

Also, thanks for the answer.
[Nexus 5 Android Development] Tcheker67:
Hello,

1. I'm trying to backup my EFS (without using your .zip, but directly in the TRWP Recovery). But when I click on "Backup", there is 4-5 cases (System, Boot, Data, ...), but no "EFS".

Is it normal or not ?

If I try to backup EFS with your .zip, will it work great ? (because I don't have the EFS case in TRWP Backup).

2. Then, I'm in KTU84P. But the topic's name is ... KTU84Q --> Does it mean that your backupEFS.zip is only for KTU84Q or it will be ok for my KTU84P ?

3. Is the radio KTU84Q the last one ? If yes, I think I could flash it.

Thank you in advance for your help !

PS : the bootloader is unlocked, root and TRWP recovery. No custom Rom, I'm stock :)
[Nexus 5 Android Development] y2whisper:
2. no the KTU84Q is in reference to the radio not the backup. can be used on what ever build you are running on your N5

3. That is the latest one. A build that was originally done for India but works for us as well. Results may vary
[Nexus 5 Android Development] Tcheker67:
Thanks you very much for Your reply. Concerning the first point, is it normal that I don't have the "EFS" backup square in TRWP ? maybe I have not the latest version...
[Nexus 5 Android Development] ChazzMatt:
I disagree, and I have proof -- from earlier in the thread from my own post when someone was complaining about a radio affecting GPS.
[Nexus 5 Android Development] Dudebowski:
I'll fill this space with something useful now...

I've had some experiences with the radio unable to turn on. This has been caused both by flashing the radio firmware zip found in this thread, AS WELL AS simply updating cyanogenmod builds. CM update zips DO flash a radio firmware every time, at least with the nexus 5 builds. Watch the recovery shell output.

I've thankfully been able to fix this so far thanks to auto prime's efs backup. Sometimes CM updates will also bork the radio firmware somehow and I have to flash a much older firmware (from this thread as well... autoprime, YTMND...) Recently I had to flash back to one of the earliest radios to get CM to be able to turn the radio back on. Once I booted and saw the radio working I was able to flash a more current radio version again.

So if you boot and your signal bars are blank, fret not yet, don't go trying to toggle stuff in your EPST and debug menus, just try flashing an old radio and then your efs backup.

Also, when you get a new PRL and or Profile update, reboot once to make sure the new config works and then take a new EFS snapshot. These are both saved in the backup, so it will save you the effort of updating from your carrier again if you ever need to use the backup.
[Nexus 5 Android Development] HiGhDRo3o5:
I see you mention prl so im guessing you are on sprint. Im on tmobile and never have i had an issue with radios before or after any updates on any rom at all
[Nexus 5 Android Development] Dudebowski:
Indeed I'm on Sprint, worse yet an MVNO. maybe other carriers have more stable modem configs, if that's the case then I'm jealous as moving to another isn't an option for me in the foreseeable future. I've seen a few folks post issues with radio tinkering in this thread, just left my research on the table above in hopes to save a fellow some hair pulling. Viva libre via community :)
[Nexus 5 Android Development] Sc4ryB3ar:
Flashed a new Rom tonight, and for whatever reason, it appears my imei got wiped. Tried using the flashable efs backup and it doesn't appear to be working for me. So I tried to do it manually via adb in the recovery. After typing in adb shell and getting the #, I am typing in the DD if=..... Command and it's saying efs1.IMG not found. It's clearly there.... Is there anything else I can do?
[Nexus 5 Android Development] Playe:
The backup is for before something happens so you can restore it... Search the thread to recover it but you may be out of luck if you don't already have a backup.

Sent from my Nexus 5
[Nexus 5 Android Development] Sc4ryB3ar:
Sorry if I wasn't clear. I tried flashing the flashable efs backup that I made months ago from the flashable backup script thing available in this thread.
[Nexus 5 Android Development] cryomagneto:
WiFi dropping

I've flashed 2 of these zips so far and both are causing WiFi dropouts. Look like I need to download an image straight from Google and pull the radio.img out and fastboot flash it.
[Nexus 5 Android Development] jd1639:
These zips contain the same image file you'll get from the factory image
[Nexus 5 Android Development] ChazzMatt:
Exactly. That's where they came from, in the first place.
[Nexus 5 Android Development] hdoraemonk:
I flashed KTU84Q zip file via cwm over PA 4.6 beta + Elementx kernel but radio still KTU84P???
[Nexus 5 Android Development] GtrCraft:
Thats the build numer of the rom... Radio is your baseband
[Nexus 5 Android Development] janissaire:
The only stable modem for international Nexus phones(D821) is KRT16M (4.4) M8974A-1.0.25.0.17 in my experience. Cyanogen 11 m11 is updated it to 1.0.50.16 or something and data drops on 3G started again. I re-flashed KRT16M and everything is back to normal.
[Nexus 5 Android Development] Andromendous:
can i try the 4.4.4 r2 if im using the US playstore N5? or not a good idea?
[Nexus 5 Android Development] PainfulLover:
Go ahead, I've been using it since the day it came out. Works great.
[Nexus 5 Android Development] Andromendous:
Umm.... Is this good???
[Nexus 5 Android Development] autoprime:
if it is possible.. it will not be due to swapping modems. Recalibrating the phone may be an option.. or it may just come down to different hardware and you're stuck with what you got.

as I've stated in the OP... the D820 and D821 modems are the same, matching md5. So if you want to swap modems.. you'd just be doing it with the same exact file.
[Nexus 5 Android Development] Golomidov:
I guess, the question was not only about swapping modem images, but also another mods, like e.g. resistor mod.
[Nexus 5 Android Development] autoprime:
the D820 and D821 have different calibration files. I'd assume the EFS would need to be recalibrated... or at least swapped from D820 to D821 or vice versa. And efs swapping may not be possible due to some IMEI protection(swap efs and youll end up with zero'd imei) so it will involve more than simply writing someone else's partition. Individual specific NV items and other EFS files would need to be edited.
[Nexus 5 Android Development] kamaliqwan:
so it may take some time... but it's still possible right?

is it same with the hybrid modem mods on Nexus 4?
[Nexus 5 Android Development] lafester:
off topic but have you been able to get diagnostic mode on nexus 5?
[Nexus 5 Android Development] JoshuaFCB:
i try to flash the backup zip but all it says is "Failed" in twrp
[Nexus 5 Android Development] dakhar:
From service manual I can see, that this resistor connects GPIO_102/EDP_HOT_PLUG_DET pin of MSM8974 (Snapdragon) with 1,8V and it's amount = 4,7K (for D820), and shorts this pin to the GND, if D821. I'm 99% sure, that this scheme work like this:

if GPIO_102=1 then <initialising for D820> else <initialising for D821>

If we can find this code in snapdragon image, we can reverse 1 bit, to change model number.
[Nexus 5 Android Development] Shaldy:
This is a huge problem, since snapdragon image is proprietary and probably very secure.

It would require disassembling the image, and digging through tons of stuff just to find this one bit.

Needle in a haystack, truly.
[Nexus 5 Android Development] dakhar:
Therefore we should try to move resistor to another contacts - it's easiest way. I can do it, than my phone comes to me.
[Nexus 5 Android Development] Shaldy:
You would be a true hero then, dakhar :)

Looking forward to reading all about it, don't forget to fully document it.
[Nexus 5 Android Development] Donald Nice:
Hey guys...

it was asked several times in the thread but never answered. Is it possible to use/flash the efsbackup in CWM or TWRP only?
[Nexus 5 Android Development] cavedano8:
Same question..

is possible to use "Nexus_5_Backup_EFS.zip" with CWM??

Thanks
[Nexus 5 Android Development] SnowLeopardJB:
Yes, it should work with both.
[Nexus 5 Android Development] sxp:
You are best

Waiting the news ;)
[Nexus 5 Android Development] IIMaxII:
So, I flashed the new baseband, and it seems to have gave me better signal in my home so far...I was only getting about 1-2 bars and no service sometimes inside my house, now I have four bars...then again I did root for the first time and flash franco's kernal...so idk...but I think it helped. lmao
[Nexus 5 Android Development] bigbyte.me:
Diag mode

Hi, Any one has an answer to this? Also If D821 and D820 are mostly same device is it possible to use their ROM's interchangeably?

Any one tried or got any success in making Sprint Nexus 5 work for GSM as well ?
[Nexus 5 Android Development] grifis78:
Which baseband do you flashed? Tnx!

Inviato dal mio Nexus 5 utilizzando Tapatalk
[Nexus 5 Android Development] kashix:
just flashed the .zip in cwm but unable to find it no matter what, I want to backup on my computer, I can only see it in recovery ...
[Nexus 5 Android Development] abbz123:
assuming this one? LGD820_KRT01B_RADIO.zip	19.2 MB	Nov-09-13
[Nexus 5 Android Development] autoprime:
http://xdaforums.com/showpost.php?p=47242132&postcount=69
[Nexus 5 Android Development] aeoveu:
Its definitely not bad by Any standards. Which model are you using?
[Nexus 5 Android Development] MaxRabbit:
Nah man those are Edge speeds.

:rolleyes:
[Nexus 5 Android Development] SWTR:
Can I backup the EFS with CWM?
[Nexus 5 Android Development] adrman:
I might be wrong, but I don't think so. Use TWRP, Philz or the script in the OP.
[Nexus 5 Android Development] ChazzMatt:
Almost. See my 2nd line. And yes I've been using 4.4.4 r2 since release in mid-July, and I'm in the USA.
[Nexus 5 Android Development] Andromendous:
im using 820
[Nexus 5 Android Development] Carlosmadiam:
Is it safe to flash LPV preview radio on 4.4.4 or is it only for preview ROMs?

Sent from my Nexus 5 Telcel Mexico LTE :cool:
[Nexus 5 Android Development] y2whisper:
Safe
[Nexus 5 Android Development] Tylog:
To clear it

You can use any Modem with any Rom, that mean you can use AndroidL Modem with 4.x.x, you can use KK Modems with AndroidL.
[Nexus 5 Android Development] HiGhDRo3o5:
Best speeds ive gotten was with 1 from 4.4.4r1 which is .16 i believe
[Nexus 5 Android Development] aeoveu:
What if you tried it with. 17? Is there any significant difference for you?

For me, I see no difference between the two (and I don't have LTE - in referring to the signal strength).
[Nexus 5 Android Development] HiGhDRo3o5:
Signal strength always seems the same on every modem but on .17 calls cut off and drop alot. Dont ever remember being able to have a clear call with it. .16 is where i have gotten the best speeds on LTE. Wifi speeds make no difference at all for it always maxes out at about 98mbps
[Nexus 5 Android Development] uronfire:
I know it says in the first post by OP not to flash the efs back zip to other phone than the original.

I have 2 nexus 5 phones , one has a blacklisted imei and the other has a smashed screen with damaged sim tray.

would it be possible to exchange the imei between the two so i can get to use at-least one phone?

Any help would be appreciated.
[Nexus 5 Android Development] phreshjive:
Would appreciate when Lollipop developer updated preview is released tomorrow, if the modem from it would be released here as a flashable zip.

Sprint users who swap between UICC and SIM cards for travel purposes have connectivity issues reestablishing a connection with the post 4.4.1/4.4.2 modems.

Best solution to date has been to flash the 4.4.2 modem, but wanted to see if the issue was resolved in the latest modem.

If not, my Twitter onslaught campaign continues.
[Nexus 5 Android Development] vin4yak:
Here's the latest LPX13D flashable Radio! :D

https://www.androidfilehost.com/?fid=95747613655047001
[Nexus 5 Android Development] Hatshipuh:
And works with 4.4.4 before anyone wonders.
[Nexus 5 Android Development] Koopa777:
Newest radios and image, I'm getting and sending no SMS or MMS on Sprint, can anyone else confirm this?
[Nexus 5 Android Development] autoprime:
OP updated with latest modem zip and img

LPX13D (L Preview)

M8974A-2.0.50.2.21

AAAAANAZQ20500024

QUALCOMM Incorporated Oct 1 2014
[Nexus 5 Android Development] EvanA:
Everything is fine here
[Nexus 5 Android Development] lolobarjo:
Work good here

Envoyé de mon Nexus 5
[Nexus 5 Android Development] Koopa777:
Could you do me a favor? Could you download this app,

https://play.google.com/store/apps/details?id=com.SIMAPNCheck&hl=en

to get into Android's APN list, then take a screenshot of what APNs are listed? If it works for you, then my APNs must be messed up.
[Nexus 5 Android Development] wind784:
Not sure if they have changed colours with preview radio signal, but seems terrible where I am, a lot of LTE/hspa+ switching. Was using the krt16m modem previously to the latest preview build release, found that one best for my area/phone. Be nice to see some other shots from preview build with new radio [emoji1]
[Nexus 5 Android Development] phreshjive:
Anyone on Sprint (UICC) who has access to an AT&T or T-Mobile SIM

Care to swap UICC to SIM on the latest radio to see if the switching / loss of connectivity issue that was present in the post 4.4.1/4.4.2 modem is gone? Would be appreciated.

For those wanting more details on topic, read here: https://discourse.ringplus.net/t/nexus-5-swapping-uicc-sim-between-r-and-a-gsm-provider-issues/2404
[Nexus 5 Android Development] mikejeep:
Users in that thread are reporting the issue is resolved when using the new radio on 4.4.4.

-Mike
[Nexus 5 Android Development] jcsww:
No complaints at all with the new modem so far. Between a solid 2 bars on AT&T Canada where previously I barely held one and had to force HSPA to keep a consistent signal and solid service in south western VA on T-Mobile.
[Nexus 5 Android Development] Basian Mile:
The "LPX13D (L Preview) M8974A-2.0.50.2.21" here is around 60+ MB and the one comes with Google Package is around 40+ MB. Why is that?
[Nexus 5 Android Development] GtrCraft:
Search... This has been answered multiple times
[Nexus 5 Android Development] combatdeity:
New modem seems to lock on to 4G a lot better than .16

3 network UK
[Nexus 5 Android Development] mchlbenner:
I'm with T-Mobile will this work for me
[Nexus 5 Android Development] jcsww:
The only way you will know is to try. On T-Mobile USA, it works well for me in the great Philly area and in southwest Virginia.
[Nexus 5 Android Development] Corvo007:
Hey guys, do I need to have root in order to flash the Nexus_5_Backup_EFS.zip file to backup my EFS?

Sent from my Nexus 5
[Nexus 5 Android Development] jd1639:
No, just a custom recovery
[Nexus 5 Android Development] Corvo007:
Thank you.

One more issue to clarify. Now I have the second Lollipop developer preview with its own radio, 2.0.50.2.21. In this point if I made an EFS backup, and if in the distant future :) I need to restore that EFS backup, do I need to flash that same 2.0.50.2.21 radio too in the restoration process, or the EFS backup files are radio independent?

Thanks.

Sent from my Nexus 5
[Nexus 5 Android Development] jd1639:
They're radio independent.
[Nexus 5 Android Development] vin4yak:
If you have a Nexus 5. It will work. Irrespective of the carrier.

-Sent from a Lollipop'd Hammerhead!
[Nexus 5 Android Development] danbrown162:
Thanks, first useful comment regarding this radio :)

I also agree with this. Same network etc
[Nexus 5 Android Development] peecs121:
On Sprint and this is the best radio to date. Download and upload are way better and locks on 4g way faster

Nexus 5 running Android 5.0 Lollipop
[Nexus 5 Android Development] g2uzer:
Is it safe to do a efs back up with any rom? ( Mahdi rom for example ) after reading this i definitely want a back up in case I loose my imei number.. Thanks
[Nexus 5 Android Development] jd1639:
Yes, in twrp make a nandroid of just the efs partition and store it off your device
[Nexus 5 Android Development] g2uzer:
Thanks for the reply.

So if I do happen to loose my imei all I have to do is reflash just the efs file to any ROM (after or before I flash a ROM )? Or its better to back it up on the same file you do a ROM backup ? I still have the original back up I did when I First got my phone but I didn't back up the efs.

I thought about restoring that one and backing it up with the efs option as well .

Sorry if all this been asked before I have read thru a few pages and didn't see it and I have the slowest internet connection is hard to read all 100 pages.
[Nexus 5 Android Development] jd1639:
Fortunately I've never had to restore the efs. But I do have a nandroid of the efs partition on my pc. If I had to use it I'd just restore it like any other nandroid. It shouldn't matter if you have a nandroid of a complete rom, including the efs, or not.
[Nexus 5 Android Development] atiftariq1:
can i write D821 baseband to D820 for LTE Enable..?

can i write D821 baseband to D820 for LTE Enable..?
[Nexus 5 Android Development] kingston73:
I think what you are asking is if you can use an 820 modem for an 821, if so then the answer is yes. Also, maybe don't repost the entire OP?
[Nexus 5 Android Development] Dudebowski:
problem....reflash EFS backup, radio wont turn on. reflash old, current, or future modem, radio won't turn on. any combination of flashing efs/modem, or reflashing a TWRP EFS backup from months ago... no radio. WTF did i bork, is there any way i can actually fix this or do I have to deal with my provider?

I've pulled my SIM card to check if it was some read problem, and factory stock system knows when a SIM exists or not because the lock screen says 'no sim' when i unplug it, and that message disappears when i put it back in. I've been having problems with connecting to mobile network for a few weeks but it finally kicked the dust today after many attempts at flashing pieces back into place (that have worked to fix it previously.)

also, the mobile status screen in options>about_phone shows IMSI data, so at least part of the EFS backup still contains the unique data required to make the mobile connection. I don't know what to do, please grand oracle of XDA come help me! :silly:
[Nexus 5 Android Development] GtrCraft:
Flash factory image
[Nexus 5 Android Development] Dudebowski:
thanks, yeah I've already done a fastboot to stock multiple times. the mobile signal notification icon is just an empty triangle on first boot. pretty sure it's a hardware issue at that point, right?
[Nexus 5 Android Development] Playe:
Are any of you using an app to help benchmark signal strength or are you just going by the icon/settings page?
[Nexus 5 Android Development] mikejeep:
Cough.. SignalCheck.. cough cough ;)

-Mike
[Nexus 5 Android Development] uronfire:
Looks like your phone is blocked or blacklisted by networks
[Nexus 5 Android Development] mariombn:
Recently I did a restore on my Nexus 5 without knowing these precious information and my IMEI was 0. Is not there some way I can use this ZIP, and change the binary to put my original IMEI? (I still have the number).

I'm desperate! Went on an assistance of LG and they said that there is no solution to this. But do not understand how such a problem can not be reversed.

The Smartphone is running normally, except that it can not connect to the 3G / LTE.

:crying::crying::crying::crying::crying::crying::crying::crying::crying:
[Nexus 5 Android Development] uronfire:
Restore the factory image it has worked for others
[Nexus 5 Android Development] mariombn:
I've done it. Not resolved. Even restarted with software from LG itself used in assists and has not resolved.
[Nexus 5 Android Development] Azlun:
I think your problem is cased by flashing a 32GB device with 16GB or flashing another NEXUS5 EFS.

that will make your EFS is rebuilt with default values, IMEI=0, and all RFNV are un-calibrated and some of RFNV lost.

If you want your IMEI back, you just need to use QXDM-NV Brower to write NV0550, you have only one time chance, not make it wrong.

If you want your phone back to 3G and LTE without 100% RF calibrated, just 90% ^_^, you just need a RF NV qcn files from another device, without a IMEI, then use QPST-Software Download-Restore to write it to your phone.

attached is on from my NEXUS5 D820, and NEXUS5 D821, do not miss them, since their Hardware is different.
[Nexus 5 Android Development] CRCinAU:
This thread is great. A quick note to say thanks. +1. Like etc....
[Nexus 5 Android Development] GtrCraft:
One note: only difference between D820 and D821 is supported bands, nothing more
[Nexus 5 Android Development] winamp26:
I backup from efs with twrp.

Its means if imei=0 I can restore it or not?

Another way to backup efs?

Sent from NEXUS5
[Nexus 5 Android Development] Azlun:
Yes,backup efs includes IMEI

---------- Post added at 08:58 PM ---------- Previous post was at 08:48 PM ----------

Yes,that is right, and some bands such as band2,3,4,8 are really crackable as my knowlege on unsupport virrant.
[Nexus 5 Android Development] combatdeity:
Same Modem on the Lollipop factory image FYI.

Edit: Same as the second dev preview.
[Nexus 5 Android Development] mariano3113:
Same modem as the Dev-preview modem or previous Kit Kat modem?
[Nexus 5 Android Development] sonicdeth:
Looks like the same radio as the second dev preview
[Nexus 5 Android Development] Steelskinz:
new baseband released with factory image lrx21o ? :confused:
[Nexus 5 Android Development] axl30:
no
[Nexus 5 Android Development] occtec:
[MENTION=2684188]autoprime[/MENTION] is it necessary to backup efs with new version of android? If so should we be waiting for an updated version of the script? Thanks mate