Develop Bugs

Is there Diag mode code for T-mobile M8?

How can i enable diagnostic mode on T-mobile Htc M8?
3424 doesn't work

jkjambo said:
How can i enable diagnostic mode on T-mobile Htc M8?
3424 doesn't work
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if your in sense why not just use the phone diagnostics from sense? its *#*#4636#*#*

syaoran68 said:
if your in sense why not just use the phone diagnostics from sense? its *#*#4636#*#*
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that's completely different thing
i need diag mode and that's only test mode

what are you trying to diagnose?

syaoran68 said:
what are you trying to diagnose?
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why are you interested in this?
i need it for few reasons , like trying to unlock lte bands , to make a back up of qcn , ect...
so is there diag mode for t-mob m8 or not? or do i need some kernel with it?

jkjambo said:
why are you interested in this?
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Because if we know what you're trying to do we can give better advice.
Unless what you're trying to do is technically against forum rules, of course

jkjambo said:
why are you interested in this?
i need it for few reasons , like trying to unlock lte bands , to make a back up of qcn , ect...
so is there diag mode for t-mob m8 or not? or do i need some kernel with it?
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what was said above ^
but back to your question. Yes there is a diag mode available, but you need a bypass card in order to access it. this diag mode is normally meant for diagnosing faulty mainboards, and the such.
so basically yes there is a mode, but no your not going to be able to get access to it. cause the card itself is a unicorn, and there have been some home made cards but realistically if your trying to download / change the bands its nearly impossible. since the firmware's are so locked down.

EddyOS said:
Because if we know what you're trying to do we can give better advice.
Unless what you're trying to do is technically against forum rules, of course
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what can you do with diag mode which is against rules? i'm not trying to change imei or something like that
syaoran68 said:
what was said above ^
but back to your question. Yes there is a diag mode available, but you need a bypass card in order to access it. this diag mode is normally meant for diagnosing faulty mainboards, and the such.
so basically yes there is a mode, but no your not going to be able to get access to it. cause the card itself is a unicorn, and there have been some home made cards but realistically if your trying to download / change the bands its nearly impossible. since the firmware's are so locked down.
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it's avaliable on sprint m8 with this code ##3424# , so what's problem with t-mob m8?
i think there should be some adb commands at least, but i'm asking if there is some code for it , like it's on sprint version

It should be the same code for all devices, unless the carrier has disabled it

EddyOS said:
It should be the same code for all devices, unless the carrier has disabled it
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not working on t-mobile m8 . as i know *#*#3424#*#* works on gsm m8 (international version) , but it doesn't work on t-mobile . i'm now on lollipop , but it wasn't working on kitkat too

here is answer . Thanks to marhinal88
On:
su
echo 1 > /sys/devices/virtual/android_usb/android0/f_diag/on
Off:
su
echo 0 > /sys/devices/virtual/android_usb/android0/f_diag/on

Retail Mode Removal

I do contract work for a cellular dealer, and they've given me some demo units to set up as loaner units for client devices going out for service.
I've been able to disable and remove the Retail Mode application on most of the devices, but the G7 Thinq doesn't seem to allow it to be removed - it's effectively baked into the ROM (it can be stopped/disabled, but that doesn't allow for full access - each time the device is wiped it goes back into demo mode, something that's useless for a service loaner).
Since I'm in Canada I'm assuming that there's no bootloader unlock available so I'm stuck until this (hopefully) drops/releases? My knowledge in my time with devices leads me to understand that there's no way to remove an app that's baked in (although some Samsung devices have bloatware removal tools or ADB commands to help with this process, so I figured asking might be a long shot!)
Thanks in advance

sh0nuff said:
I do contract work for a cellular dealer, and they've given me some demo units to set up as loaner units for client devices going out for service.
I've been able to disable and remove the Retail Mode application on most of the devices, but the G7 Thinq doesn't seem to allow it to be removed - it's effectively baked into the ROM (it can be stopped/disabled, but that doesn't allow for full access - each time the device is wiped it goes back into demo mode, something that's useless for a service loaner).
Since I'm in Canada I'm assuming that there's no bootloader unlock available so I'm stuck until this (hopefully) drops/releases? My knowledge in my time with devices leads me to understand that there's no way to remove an app that's baked in (although some Samsung devices have bloatware removal tools or ADB commands to help with this process, so I figured asking might be a long shot!)
Thanks in advance
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Click to collapse
What model is the phone? Maybe you will be lucky to somehow have the European version.

I also have LG g7 LDU we can help each other I opened it it's LGM710N board inside so I flashed with Korean kdz so now my Wi-Fi not working & storage showing 32gb phone, can someone provide some help?

Muridkegns said:
I also have LG g7 LDU we can help each other I opened it it's LGM710N board inside so I flashed with Korean kdz so now my Wi-Fi not working & storage showing 32gb phone, can someone provide some help?
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After flashing the KDz did the retail mode gone ?

Do the demo units have a active modem?
Maby it's disable to prevent them from being sold to customers.
U probably nead to flash correct kdz if its a real fully functional unit..
The demo mode is activated automatically so stores can wipe a unit fast when costomers try to tamper with demo units.

Help me please
STALKER18 said:
After flashing the KDz did the retail mode gone ?
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yes i already turned off retail mode but after flashing its unstable & restarting itself also wifi not working & its showing 32gb storage instead 64gb. please someone help me.

No OEM Unlock after 168 Hours

Hi everyone.
I recently purchased a A705W from online. It's been working great on Metro/T-Mobile for me, however, even after 168+ hours of up time, I still don't see the "OEM Unlock" option in developer options.
I've factory reset the phone (beforehand, and let THAT add up to 168+ hours), manipulated the time and date, etc. Nothing seems to be working.
Any suggestions on how I can get the OEM Unlock option to appear?
Thanks!

leotakacs said:
Hi everyone.
Any suggestions on how I can get the OEM Unlock option to appear?
Thanks!
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...
I have a SM-A705FN (UK model). I'm not sure about your model in terms of it having the OEM unlock option in the developer options, I've seen some threads here that some of the North American models don't allow it.
I had the same issue, but found that I had to have a sim card installed and connected to Wi-Fi (and plugged into the charger of PC), but I don't think the cable being plugged in was the issue, definitely the SIM, and Wi-Fi, at least for me.
Give me a sec and I'll try on mine and get back to you.

gaplayer26 said:
...
Give me a sec and I'll try on mine and get back to you.
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Sorry my friend, I tried:
- Disabling OEM Unlocking in Developer Options
- Disabled USB debugging.
- Disabled Developer Options.
- Disabled Wi-Fi
- Powered off the phone, removed sim tray.
- Powered back on, enabled developer options again, and OEM Unlocking is there.
I have had the same problem as you, but that was a while back and I've flashed so many different versions since.
Why are you waiting for the OEM unlock to appear? It's either there or not, no time constraints as far as I know. Perhaps someone else knows.
As I said, try factory reset/wipe cache, ensure a sim is in, connect to wi-fi and perhaps try again.
Good luck. :good:

Ok, replicated and got it to work
I replicated the issue you are experiencing, this is the procedure I followed - hope it works for you:
- Disabled USB debugging, OEM unlocking and then disabled Developer Options.
- Disabled Wi-Fi.
- Flashed the latest version of stock firmware.
- Powered down the phone and removed the SIM tray.
- Disconnected the charger/PC cable.
- Rebooted to stock android recovery, factory reset/wipe cache.
- Started phone again, skipped most steps, including Wi-Fi setup (still no sim card installed).
- Enabled developer options, confirmed, NO OEM Unlocking available.
- Connected to Wi-Fi.
- Went to Developer options, OEM Unlocking now available. :good::good:.
So, at least for my SM-A705FN, you don't need a sim card, just internet connectivity (and probably a fresh flash of stock firmware, factory reset and cache wipe from android recovery).

You cannot unlock the bootloader of a Snapdragon based Samsung A70 such as the A705W or any North American variant of this phone. You can however unlock an Exynos version which is the European variant like the A705F. Sorry.

crystalclear30 said:
You cannot unlock the bootloader of a Snapdragon based Samsung A70 such as the A705W or any North American variant of this phone. You can however unlock an Exynos version which is the European variant like the A705F. Sorry.
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I have the European A70 wich is snapdragon with an uocked bootloader lol all European models of the A70 is snapdragon

crystalclear30 said:
You cannot unlock the bootloader of a Snapdragon based Samsung A70 such as the A705W or any North American variant of this phone. You can however unlock an Exynos version which is the European variant like the A705F. Sorry.
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who told you such things lol , also there isnt any exynos A705 devices, All theses devices are unlockables : A705FN , A7050 , A705W , A705F , YN , GM , MN

BK said:
who told you such things lol , also there isnt any exynos A705 devices, All theses devices are unlockables : A705FN , A7050 , A705W , A705F , YN , GM , MN
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You're right, A705 is only Snapdragon (confusion with S10) however, north American versions of this phone like A705W are not bootloader unlockable due to carrier restrictions.
Here's another post explaining the issue:
https://forum.xda-developers.com/galaxy-a70/help/oem-unlocking-appear-t3952918
I've got the phone and it's not possible at the time of this post. Sorry.

crystalclear30 said:
You're right, A705 is only Snapdragon (confusion with S10) however, north American versions of this phone like A705W are not bootloader unlockable due to carrier restrictions.
Here's another post explaining the issue:
https://forum.xda-developers.com/galaxy-a70/help/oem-unlocking-appear-t3952918
I've got the phone and it's not possible at the time of this post. Sorry.
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Damn that sucks....thanks for the answer, though. Still appreciated.
Would you happen to know if the A705MN is bootloader-unlockable?

leotakacs said:
Damn that sucks....thanks for the answer, though. Still appreciated.
Would you happen to know if the A705MN is bootloader-unlockable?
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I'm not sure about bootloader, but "OEM unlock" option is there in A705MN. What is up with prices on Canadian A705? I'd say get A705MN for much cheaper!

bravomail said:
I'm not sure about bootloader, but "OEM unlock" option is there in A705MN. What is up with prices on Canadian A705? I'd say get A705MN for much cheaper!
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I got my A705W for $229, so it was a pretty good deal. I bought an A705MN on Amazon and it arrived today. Rooted, TWRP'd and everything in between with no problems I've filed for a return for the 705W.

leotakacs said:
I got my A705W for $229, so it was a pretty good deal. I bought an A705MN on Amazon and it arrived today. Rooted, TWRP'd and everything in between with no problems I've filed for a return for the 705W.
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HI do you know how to convert A705w single sim to dual Sim?

akshargajjar said:
HI do you know how to convert A705w single sim to dual Sim?
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Click to collapse
The process is similar to converting a hatchback to a sedan.
1. Order a dual SIM A70
2. Sell the A705w single SIM on Swappa, eBay or craigslist.
Why do you think it is possible?

flashing a combination firmware should fix the OEM unlock without problem, its a developer firmware used for tests, here it is https://androidfilehost.com/?fid=1899786940962591760
flash in odin!

BK, I'm on a A705W with the December ASK2 ROM.
Is there any danger in flashing this combination ROM? I need to root but don't have OEM unlock option.

JoshReuben said:
BK, I'm on a A705W with the December ASK2 ROM.
Is there any danger in flashing this combination ROM? I need to root but don't have OEM unlock option.
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great profile picture! no there isn't any danger to flash a dev firmware , but we can't flash theses anymore.

BK said:
great profile picture! no there isn't any danger to flash a dev firmware , but we can't flash theses anymore.
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Thanks BK!
I'm finding these via Sammobile, but they aren't Dev: https://www.sammobile.com/samsung/galaxy-a70/firmware/SM-A705W/TLS/
Sorry to be dense, but I'm trying to measure twice/cut once Can you point me to an appropriate firmware to install via Odin in order to unlock? I'm on Telegram if you prefer.

How to exit Demo Mode on G8 ThinQ G820V

Hello everyone,
I have a question about how to exit demo mode of G8, I bought a phone from eBay, it is demo unit which cannot make a phone because of no IMEI,
I'm ok with that because I use it just for playing game, the problem is that it always enter mode if not use it about 30s, it is annoying, is there anyway to exit demo mode? is that possible to flash a ROM into demo unit?
Here is my specific phone: LG G8 ThinQ LM-G820V.
Thank you for any help that you can possibly give me.

glaciersnow said:
Hello everyone,
I have a question about how to exit demo mode of G8, I bought a phone from eBay, it is demo unit which cannot make a phone because of no IMEI,
I'm ok with that because I use it just for playing game, the problem is that it always enter mode if not use it about 30s, it is annoying, is there anyway to exit demo mode? is that possible to flash a ROM into demo unit?
Here is my specific phone: LG G8 ThinQ LM-G820V.
Thank you for any help that you can possibly give me.
Click to expand...
Click to collapse
No there's no way to flash another rom... I'm not sure if theres some way to exit demo mode but I doubt it.

Exit demo mode is quite easy you can follow the steps for lg g7 demo unit here in xda. Can you use a memory card in your unit? I have the same unit but memory card is not recognized.

there is away https://forum.xda-developers.com/t/lg-g8-demo-unit-flash.4098243/#post-85023461

SM-N975x I bought a demo phone

SM-N975x I bought a demo phone but someone repair Imei and both sims are working fine but the issue is, I'm not getting software updates whenever I tried to update it says registration failed. Any solution.?

If it's got older firmware on it which lets you unlock the bootloader, DO NOT UPDATE or else you'll lose the ability to 'root' it.

djshotty said:
If it's got older firmware on it which lets you unlock the bootloader, DO NOT UPDATE or else you'll lose the ability to 'root' it.
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Click to collapse
then anyway to install latest stock apps like Gallary, Camera

If, as you say, it is a demo unit, and for some reason, it works in cellular networks, leave it as it is! It is rather odd that a "demo unit" functions as a regular one, because demo units are specifically made not to, so, use it as it is

farhan_ali790 said:
SM-N975x I bought a demo phone but someone repair Imei and both sims are working fine but the issue is, I'm not getting software updates whenever I tried to update it says registration failed. Any solution.?
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Try Flashing the UPdates with odin but Tell me first where are you from and if it is exynos processer or snapdragon ?

hoss_n2 said:
Try Flashing the UPdates with odin but Tell me first where are you from and if it is exynos processer or snapdragon ?
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Its N975F showing as a model I'm from pakistan.

There is a set way to disable demo mode. You need to know the carrier. I have the codes for some.