I tried to flash latest 10L firmware, but I always get the messages Problem with communication between cell phone and PC. I did everything as instructed, selected Normal flash, but it won't work. I installed needed drivers, but when I reboot to Downloading mode, there is Exclamation sign in device manager. What could be the problem?
Did you change the port to com41?
Also are you using windows 8? If you are you need to disable signature verification.
I don't know how to change port to com41. I am using Windows 7.
TwinHeadedEagle said:
I don't know how to change port to com41. I am using Windows 7.
Click to expand...
Click to collapse
It's in the guide that you said you followed. Open your device manager in windows and right click on the lg device that shows up. Next hut advanced and change the port to com41 and then click ok.
I did that, and it still shows the same message.
Bump
Sent from my LG G3 using Tapatalk
TwinHeadedEagle said:
I tried to flash latest 10L firmware, but I always get the messages Problem with communication between cell phone and PC. I did everything as instructed, selected Normal flash, but it won't work. I installed needed drivers, but when I reboot to Downloading mode, there is Exclamation sign in device manager. What could be the problem?
Click to expand...
Click to collapse
Hi did you fix it?
I encountered the same problem. Thanks.
I didn't fix it, problem is still there.
Sent from my LG G3 using Tapatalk
Please state the exact link to the guide you're using, your phone model number and windows version.
Thanks for responding.
I tried to follow several guides, but none of them works.
I think I tried this one first --> http://forum.xda-developers.com/showthread.php?t=2785089
LG G3 International 32gb D855
v10i currently installed
Phone rooted with Bump TWRP
Bump.
Did you install the latest LG drivers for your phone? I don't know why this didn't occur to me earlier but that plays a big part in the PC seeing your phone.
Yes, I have driver. PC Suite works, everything works, but Flash tool doesn't.
Sent from my LG G3 using Tapatalk
Could this be connected with bump twrp. Maybe it is blocking this somehow.
Sent from my LG G3 using Tapatalk
Problem solved, I was using different PC and it worked
TwinHeadedEagle said:
Thanks for responding.
I tried to follow several guides, but none of them works.
I think I tried this one first --> http://forum.xda-developers.com/showthread.php?t=2785089
LG G3 International 32gb D855
v10i currently installed
Phone rooted with Bump TWRP
Click to expand...
Click to collapse
You've got to boot into download mode and then use the LG FLash Tool 2014. There's one error stating there is an error with a connection, just ignore it and watch your phone screen! If it tells you stuff like the current version and the version it is about to install, just let it sit and wait till it reboots automatically.
The reason I am saying is because you say "Problem with communication between cell phone and PC" and it looks like the error that is supposed to show up.
Could you please re-do the process, maybe re-install the LG drivers and use LG FLash Tool again. If you encounter any error either make a screenshot or type the EXACT error message in here.
Good luck
I solved the problem.
Sent from my LG G3 using Tapatalk
For all who is experiencing the same thing problem is in 64bit OS but it is not a rule. People reported that they were succesfully flashed their devices on win7 x64. If you want to be sure use x86 windows and it should be working.
Related
I'm in a bit of a pickle...
Phone is dead, I'm unable to wake it using any method, however PC sees the device being connected. I have tried to restore TWRP backup which was completed correctly but then phone stuck and failed to wake up again. I have tried to unbrick it using the LG flash tool and dll +tot files however this method fails each time -with factory model check error - and download fail notification. Right now im waiting for kdz file to download (im using the tool checking my imei to select correct one) but it takes ages with my internet.
Anyone has any ideas? Am i doomed?
Hi
Happened to me also. I got out of it by using LG flash tool and clicking on options and selecting restore recovery. It puts it back to stock and you then need to reroot etc.
Stransky
Sent from my Desire 816 using Tapatalk
Stransky said:
Hi
Happened to me also. I got out of it by using LG flash tool and clicking on options and selecting restore recovery. It puts it back to stock and you then need to reroot etc.
Stransky
Sent from my Desire 816 using Tapatalk
Click to expand...
Click to collapse
Options? On mainstream there isn't any. Is it on the 2nd screen after adding the kdz?
Current progress
Phone:
No download mode
No boot on the phone
Device acts dead - only visible on my pc (serial port LGE)
PID and IMEI not available to read using LG flash tool 2014
Tried
Loading KDZ file - connection failed
using tot and dll with flash tool - Failed to connect to device
Read something about laf.img using adb... Anyone has any other ideas? Funny enough when I was searching forums I was not able to find more info about cases when device is not waking up at all. but now i see few very similar threads around? Possible flaw somewhere?
Please take a SC of your device manager...
ScAvEnGeR(PHC) said:
Please take a SC of your device manager...
Click to expand...
Click to collapse
Here you go:
https://drive.google.com/folderview?id=0B-PcKi2bLtK_X2RyZGNxdXBHVnM&usp=sharing
thanks!
(actually android device is gone now from the list - it was visible when i was installing the drivers - strange?)
quintaar said:
Here you go:
https://drive.google.com/folderview?id=0B-PcKi2bLtK_X2RyZGNxdXBHVnM&usp=sharing
thanks!
(actually android device is gone now from the list - it was visible when i was installing the drivers - strange?)
Click to expand...
Click to collapse
Thank God it is showing a serial port, try flashing with LG tools 2014, let me find a fix for your download error...
EDIT: Is your phone by any chance plugged into a usb 3.0 port? If yes then please plug it in a usb 2.0 port and try again...
I hope you are right. Screens hots should be updated same link:
https://drive.google.com/folderview?...nM&usp=sharing
Laptop has no usb3.0 so im safe there. Tried 3 cables as well. Not sure what was it shown it was I think Android device but it is no longer there. Just the com port. Lge
@quintaar
Sorry my bad. I should have said LG Mobile support tool. If you have it click on the options and select Upgrade recovery.
Stransky
Sent from my LG-D855 using Tapatalk
Stransky said:
@quintaar
Sorry my bad. I should have said LG Mobile support tool. If you have it click on the options and select Upgrade recovery.
Stransky
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
It might be the PC (work pc at the moment and some IT limitations on it) however drivers installed ok, software confirms that I have latest software on my device - when phone is connected to the pc. After running Recovery Upgreade, it gets problem with comunication between the pc and mobile. in troubleshooting asks to power on the mobile (which I cannot do) before retrying. Also I have installed LG usb driver from outside as options coming with this software seem to be for really old models?
A thing I tried with another G3 was to connect the phone to the PC without the battery and then insert the battery, disconnect from phone and then remove battery again then insert and hold volume up and connect the USB to the phone again and it went into download mode and allowed the use of LG support tool as before.
Its worth a try!!
Stransky
Sent from my LG-V500 using Tapatalk
Stransky said:
A thing I tried with another G3 was to connect the phone to the PC without the battery and then insert the battery, disconnect from phone and then remove battery again then insert and hold volume up and connect the USB to the phone again and it went into download mode and allowed the use of LG support tool as before.
Its worth a try!!
Stransky
Sent from my LG-V500 using Tapatalk
Click to expand...
Click to collapse
No dice... so far. I'm back home in 2 days when i can try all of this again making sure that PC is not restricted from any functionality... although it does sucks to not to have a phone until then. If you get any ideas I'm happy to try it as well.. as not like i have anything to lose at this point.
I decided to downgrade my LG G3 D851 from Lollipop 5.0.1 to the stock firmware.
I followed all of the steps of to downgrade my LG G3 D851 to the tee.
Towards to end, you have to restart your phone at the blue screen, this is what I did by taking out my battery when the big red "3" came up. It looked like it worked fine in the video right? But, to my luck, it just created a boot loop that I cannot get out of.
The reasons that I cannot get out of this boot loop are:
1. Because the LG G3 is so messed up, my computer will only recognize it as an unknown device even with the drivers installed.
2. The only way as far as I can see right now to fix it would be to follow the steps of the SAME video that caused this.
Any solutions guys?
Sorry if I am being vague, I'm kind of new around these parts and to rooting. If you need any answers I can surely provide.
Thanks!
Okay see if you can cancan get ti download mode. Take out your battery, put it back in, then hold volume up and plug in the USB. You should see a firmware update screen. Once there use lg flash tool to flash back to stock via kdz or tot.
Sent from my LG-D800 using Tapatalk
xmayhemreturnsx said:
Okay see if you can cancan get ti download mode. Take out your battery, put it back in, then hold volume up and plug in the USB. You should see a firmware update screen. Once there use lg flash tool to flash back to stock via kdz or tot.
Sent from my LG-D800 using Tapatalk
Click to expand...
Click to collapse
Hey! The reason that the boot loop was created in the first was BECAUSE I tried to flash back to stock. Also, even if I did try to do this, the PC would not recognize the device and would register it as an "unknown device" even if I have LG G3 drivers.
Do you mind sending a screen shot of what you see in the computer? Does your phone still go to download mode anyway?
Sent from my LG-D800 using Tapatalk
xmayhemreturnsx said:
Do you mind sending a screen shot of what you see in the computer? Does your phone still go to download mode anyway?
Sent from my LG-D800 using Tapatalk
Click to expand...
Click to collapse
Here is a screenshot: h t t p://i.imgur.com/5SUI9rR.png
The phone is perfectly able to go into download mode
May I know what version of windows you are running?
xmayhemreturnsx said:
May I know what version of windows you are running?
Click to expand...
Click to collapse
Windows 10
justinvan777 said:
Windows 10
Click to expand...
Click to collapse
Do you have access to a computer with windows 7 or possibly 8. From what I know WIndows 10 is not supported by lg drivers yet. This could have resulted in your brick, however you can try to uninstall the drivers and re install them.
should try running the lg suite on your win 10 machine in compatibility mode for an older windows
Hi guys,
i recently use layers for my xenonhd rom (lg f400LL)
and then i reboot then boom it goes bootloop
what i have to do?i hardbrick my phone recently and i fix that by doing the shorwire method
but rightnow i use LGUP but it says that:
http://imgur.com/KTK9Vrb
i can still access download mode but i have problems on accessing the twrp recovery because it always boot on the bootloop,i mean
i have problems on using hardware keys to access twrp.
Sir pls help me
Stiffmeistro said:
Hi guys,
i recently use layers for my xenonhd rom (lg f400LL)
and then i reboot then boom it goes bootloop
what i have to do?i hardbrick my phone recently and i fix that by doing the shorwire method
but rightnow i use LGUP but it says that:
http://imgur.com/KTK9Vrb
i can still access download mode but i have problems on accessing the twrp recovery because it always boot on the bootloop,i mean
i have problems on using hardware keys to access twrp.
Sir pls help me
Click to expand...
Click to collapse
I didn't had the same issue as you, but had a similiar one (phone didn't get discovered neither by LGUP nor LG Flash Tool). Yesterday I fixed it by following this guide:
http://forum.xda-developers.com/showthread.php?t=2785089
In particular the part where you change your device to COM41 in the device manager.
After you get it discovered by LG Flash Tool flash an official KDZ.
Reboot the phone and connect it to your Windows, allow the connection from the phone screen.
It should promt you to install drivers on the computer, do that (they are different from LG Drivers you download from the web mind you)
Now you can change your COM port back to 3 and everything should be fully discoverable by both LGUP and LG Flash Tool.
I think I replied to you on reddit (same photo) Have you tried plugging the phone in while in download mode ? Did you try installing drivers from the internet ? Coz thats how I fixed the same problem you have.
Fluffywolf said:
I think I replied to you on reddit (same photo) Have you tried plugging the phone in while in download mode ? Did you try installing drivers from the internet ? Coz thats how I fixed the same problem you have.
Click to expand...
Click to collapse
engmia said:
I didn't had the same issue as you, but had a similiar one (phone didn't get discovered neither by LGUP nor LG Flash Tool). Yesterday I fixed it by following this guide:
http://forum.xda-developers.com/showthread.php?t=2785089
In particular the part where you change your device to COM41 in the device manager.
After you get it discovered by LG Flash Tool flash an official KDZ.
Reboot the phone and connect it to your Windows, allow the connection from the phone screen.
It should promt you to install drivers on the computer, do that (they are different from LG Drivers you download from the web mind you)
Now you can change your COM port back to 3 and everything should be fully discoverable by both LGUP and LG Flash Tool.
Click to expand...
Click to collapse
Hey Bro'ssss
now i am stuck on the recovery
i always flash the rom but when i boot it always go to the recovery(twrp)
Stiffmeistro said:
Hey Bro'ssss
now i am stuck on the recovery
i always flash the rom but when i boot it always go to the recovery(twrp)
Click to expand...
Click to collapse
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result
engmia said:
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result
Click to expand...
Click to collapse
Thanks man its all ok now
i dont have time to explained what i did but it works
Many thanks to all of you
hey guys, LGUP will not see my phone at all(LGV10) its in download mode , but does not come up. its stuck on LG boot screen and wont go past it. any help would be appreciated... I am, or was rooted anyway, and trying to reflash again. need to in order to fix it now. thanx
1SouthernCanuck said:
hey guys, LGUP will not see my phone at all(LGV10) its in download mode , but does not come up. its stuck on LG boot screen and wont go past it. any help would be appreciated... I am, or was rooted anyway, and trying to reflash again. need to in order to fix it now. thanx
Click to expand...
Click to collapse
Just read over the thread, it's what it's here for.
Stiffmeistro said:
i dont have time to explained what i did but it works
Click to expand...
Click to collapse
You asked for other people's time to help you, but now you don't have time to explain how you made it work?
Yeah... there MIGHT be other people with the same problem, but why would you care to share.
What an as*hole you are. Another typical new buttuser ruining a great dev community.
exactly
leandeganis said:
You asked for other people's time to help you, but now you don't have time to explain how you made it work?
Yeah... there MIGHT be other people with the same problem, but why would you care to share.
What an as*hole you are. Another typical new buttuser ruining a great dev community.
Click to expand...
Click to collapse
Exactly, here I am running around in circles over this BOOST Stylo 2, just got it with MM 6.0.1 out of the box 2 days ago. I caught the 454.4mb update it has been trying to do! Got that baby downloaded! 1.02gb unzipped and renamed to kdz. Got a script for Terminal that will replace Kingroot's temp root with SuperSU but I am not going to attempt any further until I know LGUP will recognize and flash my .zip the bas****s deem not worth enough to put up for download on LG's site!
I got LGUP to recognize it in download mode, reads out LGLS775 but still says it cannot open it...............
His info on how he got it to work would prolly have solved this dillema..............
oh well
zach
ok had a LG G3 that's done this- as long as you can get download mode it should recover, YOU need to use the LG mobile support tool from LG website ( LG UP sees phone as unknown model ) run LG mobile Support tool and in option choose UPGRADE RECOVERY . follow instructions and allow to start process, it took 57 minutes to repair my phone - it will seem frozen anywhere from 0% to about 22% JUST WAIT IT OUT!! lg up / twrp flashes in 5 to 10 mins -- the LG m.s.t writes block by block and takes 1 hour +
so hints and info took 3 goes to find and start upgrade recovery - error on a couple of attempts. phone seems frozen around 10% and 15% of firmware upload -- go make a coffee drink it, go pee then come back and worry! A watched pot never boils!....
Stiffmeistro said:
Thanks man its all ok now
i dont have time to explained what i did but it works
Many thanks to all of you
Click to expand...
Click to collapse
please tell me how to solved your problem my D682 deivce is always opening on recovery but there is no recovery menu just android robot
I have same issue as op described .After unbrick my g3 f400s by short wire method i get error at 94% in tot method and red screen show these word error wrong qem =0 .After remove and put battery again mobile runing but without baseband and null imei .Plz help i need really help
Same here. LGUP Says it is not recognized, even if it says it's a LG G3 855... Trying the LG Mobile Support Tools -> UPGRADE RECOVERY using my Model/serial.
Downloading right now...
Hope it works.
I will tell you when/if I got it to work
Also: Stiffmeistro you're a ****...
---------- Post added at 03:33 AM ---------- Previous post was at 03:22 AM ----------
Sedado77 said:
Same here. LGUP Says it is not recognized, even if it says it's a LG G3 855... Trying the LG Mobile Support Tools -> UPGRADE RECOVERY using my Model/serial.
Downloading right now...
Hope it works.
I will tell you when/if I got it to work
Also: Stiffmeistro you're a ****...
Click to expand...
Click to collapse
It didn't. It's EVEN MORE broken :'(
I figured out how to get my PC to recognize my D851. Apparently all the LG software didn't like how many COM ports I have. As soon as I unplugged everything else from my PC, the software worked. In this case, it was LG Flash Tool 2014, but I couldn't get any of them to work before.
Try running LGUP as Admin!!! For me it worked!
Try running LGUP as Admin!!! For me it worked!
Thankx Bro Its Work
engmia said:
The method I'm describing uses Download Mode so it should work for you.. Try it and tell us the result
Click to expand...
Click to collapse
Hope someone can help me. I flashed a rom for a d855, d855g30 I think, and although I can access download mode all aps for flashing fail saying it's the wrong model number. Even the generic DLL file cant trick it. It still starts booting the rom but boot loops before entering. I no longer have twrp and when I try to do safe mode or factory reset I get a boot validation error or something similar. Just seem to be stuck. Im using a VS985.
One cause of LGUP "UNKNOWN"
While an old thread, it'll be found in searches. For anybody who gets "UNKNOWN" device with LGUP for the LG G3, I found that LGUP for the G3 is often distributed with the wrong DLL file. See the details here, post #11. After installing LGUP, make sure that the "model" subdirectory in the LGUP program directory is the same number as the processor in your phone, in my case c:\Program Files (x86)\LG Electronics\LGUP\model\8974 (was 8994 with the "LGUP for G3" I downloaded).
HTH
Hey all, I think I broke my G4 h811 , but not at all because I can access to download mode, the problem is that when I try to open LGUP or LG flash tools, my LG appears as UNKNOW MODEL, and because of that I can´t install the kdz file, I tried to re install all the drives and so on, I am working in a win 10 laptop. Someone that can help me. Thanks!!! I will be waiting for a answer.
Enable usb debugging mod in settings>developer options. And also make sure that you have all the lg drivers installed and working. I am sure you will be fine.
fncalderong said:
Hey all, I think I broke my G4 h811 , but not at all because I can access to download mode, the problem is that when I try to open LGUP or LG flash tools, my LG appears as UNKNOW MODEL, and because of that I can´t install the kdz file, I tried to re install all the drives and so on, I am working in a win 10 laptop. Someone that can help me. Thanks!!! I will be waiting for a answer.
Click to expand...
Click to collapse
Try using LGBridge and clicking the update error recovery.
You are coming from an international rom right?
change port number. or task manager adb kill
mdau said:
Enable usb debugging mod in settings>developer options. And also make sure that you have all the lg drivers installed and working. I am sure you will be fine.
Click to expand...
Click to collapse
Thanks for answering, Unfortunately I can´t access to android just Download mode
Vseprz said:
Try using LGBridge and clicking the update error recovery.
You are coming from an international rom right?
Click to expand...
Click to collapse
I am coming from a rooted T-Mobile rom, all happened because I change the file build.prop :/, I tried LGBridge but nothing
ToreqLex said:
change port number. or task manager adb kill
Click to expand...
Click to collapse
thanks for answering, I already changed port number to 41, what do you mean with task manager adb kill ?
fncalderong said:
I am coming from a rooted T-Mobile rom, all happened because I change the file build.prop :/, I tried LGBridge but nothing
Click to expand...
Click to collapse
And you no longer have recovery mode?
Vseprz said:
And you no longer have recovery mode?
Click to expand...
Click to collapse
I can access by VOL- & Power with factory data reset options, I tried but nothing change
fncalderong said:
I can access by VOL- & Power with factory data reset options, I tried but nothing change
Click to expand...
Click to collapse
So using the hardware buttons, and clicking yes through the factory reset confirmation does not boot you into recovery mode? Did you format your internal memory?
Vseprz said:
So using the hardware buttons, and clicking yes through the factory reset confirmation does not boot you into recovery mode? Did you format your internal memory?
Click to expand...
Click to collapse
using hardware buttons and clicking yes the phone just restarted and that´s it. I didn´t format my internal memory. I was trying to fix my phone by using kdz files but the problem is that the programs as lg flash tool and LGUP don´t recognize the model of my lg g4.
fncalderong said:
using hardware buttons and clicking yes the phone just restarted and that´s it. I didn´t format my internal memory. I was trying to fix my phone by using kdz files but the problem is that the programs as lg flash tool and LGUP don´t recognize the model of my lg g4.
Click to expand...
Click to collapse
What firmware were you on? What message did LGBridge say when you tried error update recovery?
I have the same problem with my H815 and Windows 10. All drivers are set up correctly. In device manager, I can see the device and ADB Device, but LGUP won't recognize my G4. Obviously, LGUP is buggy...
Is there any better tooling to upgrade to a more recent ROM? Otherwise, I really would have to change to CM13 - upgrading is very easy and not any nasty USB stuff what in the end may not work at all...
Vseprz said:
What firmware were you on? What message did LGBridge say when you tried error update recovery?
Click to expand...
Click to collapse
I am porting the h811 20i, LGBridge say just that there are not update errors that can be recovered
Maheshwara said:
I have the same problem with my H815 and Windows 10. All drivers are set up correctly. In device manager, I can see the device and ADB Device, but LGUP won't recognize my G4. Obviously, LGUP is buggy...
Is there any better tooling to upgrade to a more recent ROM? Otherwise, I really would have to change to CM13 - upgrading is very easy and not any nasty USB stuff what in the end may not work at all...
Click to expand...
Click to collapse
But I can´t even access to android :/
fncalderong said:
Hey all, I think I broke my G4 h811 , but not at all because I can access to download mode, the problem is that when I try to open LGUP or LG flash tools, my LG appears as UNKNOW MODEL, and because of that I can´t install the kdz file, I tried to re install all the drives and so on, I am working in a win 10 laptop. Someone that can help me. Thanks!!! I will be waiting for a answer.
Click to expand...
Click to collapse
Download this driver. This will help you.
I am new to this forum so I can not link, but you have to look for LG driver version 3.14.1
I had the same problem today and it helped me.
Good luck
JanMarty said:
Download this driver. This will help you.
I am new to this forum so I can not link, but you have to look for LG driver version 3.14.1
I had the same problem today and it helped me.
Good luck
Click to expand...
Click to collapse
Thanks, but I installed the drive and nothing is still Unknow model for LGUP :/
Hello, i have an LG-H815 mobile stuck on boot screen and im trying to flash it with LG Flash Tool 2014. I installed the drivers LGMobileDriver_WHQL_Ver_4.0.4_2 and connected the phone in download mode. Selected CS_EMERGENCY and the kdz file: H81520B_00.kdz. Now i try to CSE Flash and selected START. Then the process starts and i get "connection to server failed". I think driver problem.....check the attachment...btw using windows 7
Help....
andrew21 said:
Hello, i have an LG-H815 mobile stuck on boot screen and im trying to flash it with LG Flash Tool 2014. I installed the drivers LGMobileDriver_WHQL_Ver_4.0.4_2 and connected the phone in download mode. Selected CS_EMERGENCY and the kdz file: H81520B_00.kdz. Now i try to CSE Flash and selected START. Then the process starts and i get "connection to server failed". I think driver problem.....check the attachment...btw using windows 7
Help....
Click to expand...
Click to collapse
why not use LG G4 LGUP google it. for KDZ's
Can I use in Windows 10 and what about driver, it's not installing?
andrew21 said:
Can I use in Windows 10 and what about driver, it's not installing?
Click to expand...
Click to collapse
not sure , but if i remeber right. they talk about win10 compatibility i think use other computer like win7.
like i said not really sure read the thread for go back to stock.. it should say or the LGUP KDZ thread.
am on win 7 works okey.
How do I know which firmware to download for LG-H815? Tried searching by IMEI but didn't find anything. Also, for drivers I read somewhere that I should do Windows update.
andrew21 said:
How do I know which firmware to download for LG-H815? Tried searching by IMEI but didn't find anything. Also, for drivers I read somewhere that I should do Windows update.
Click to expand...
Click to collapse
Not sure about your KDZ better ask here and as for driveres i have the same i think..no need to update..
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Does anyone have a solution to my driver problem please?
andrew21 said:
Does anyone have a solution to my driver problem please?
Click to expand...
Click to collapse
Only drivers i've used for lgup are the LGMobileDriver_WHQL_Ver_4.0.4, covers the spectrum of mtp etc
Ok I'll try it out..... Thanks
andrew21 said:
Does anyone have a solution to my driver problem please?
Click to expand...
Click to collapse
Sometimes its actually normal when the process shows error let it finish completely if not ur stuck with using LG UP its easy
Sent from my LG-H815 using XDA-Developers mobile app