yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] behemot24:
Exactly: BRI, TGY and CHC are the 3 interchangeable codes for the N9860 :good:
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] marriusf81:
Thanks,bud. I'll give it a try.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] gamekill:
EDIT: device is Note 20 Ultra N986N Korean, LG U+, system security update August 1.

Can anyone please help with this part:

After I "Try Out" the special theme and automatically go back to the Home screen,

I open Settings -> About Phone -> Legal information

But then all the options are normal (not modified) and no matter which one I choose, it is just normal Legal information.

Everything seems to be fine (phone is offline, themes app is updated and I am logged in, ADB debugging is on in developer mode).

Thanks for any help!
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] tribalfs:
The guide is intended for Hongkong/Taiwan variant. It may also work on korean variant but need to be on Jul security patch. But I don't think you can change the Csc to non-Korean Csc.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Limeybastard:
Isn't Samkey the only method to change CSC now ?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
I really don't know, but;

I did reach out (their chat support) about the possibility of changing the CSC (from TGY to CHC) without having to flash China full rom, and this was what I got:

________________________________________________________

ME: Hi, when will you have support the Dual SIM (Hong Kong variants) Note 20 Ultra? I mean model (SM-N9860). Mainly the possibility of changing CSC codes?

HIM: Hello

All version all carrier supported for change csc function

It's available now.

ME: Thanks, but it doesn't show up on the main page (search)

HIM: As supported.

ME: In fact (not found). Let me explain what a lot of Note 20 ultra (Snapdragon HK dual sim SM-N9860) users are searching for: The ability to use Samsung call recording feature (present on the CSC China variant) without flashing China variant ROM (which is really not that good , full of China stuff we don't need, and lacking PlayStore).

HIM: Search option is for unlock process

Which carrier do you want to have?

ME:eek:k, that might explain, because SM-N9860 isn't unlocked at all (no need)

HIM: CHC TGY BRI ?

ME: Currently i have a HK native rom, that has CSC -> TGY (Hong Kong). And I want to change it to CHC (mainland china).

Do you think that we could change (TGY to CHC) without flashing China ROM, will enable Native (Samsung) call recording?

HIM:Flash OZL csc via odin, then use samkey to change csc CHC supported by OZL csc...

ME: How does the process works? How do I activate it?

HIM: Contact reseller ( top of website "RESELLER" )

ME: And where do I get ”OZL” csc file (not a full rom, right?)?

HIM: Login to code reader Insert CHC then press change csc button.

You can find it “OZL“ on or download section.

________________________________________________________

And that was all.

But I still have doubts on how to:

- Grab ”OZL“ csc file, meaning where (which rom) can I take/extract it from?

- logon to ”code reader” and insert CHC and press “change...“.

Anyone with experience with these procedures?

I guess someone already pointed to this idea on (”9860 improvements” thread):

Quote

________________________________________________________

User andriy_

B - no, you need to flash all the components (BL, AP etc.). I had "TGY/TGY, TGY", now I have "CHC/CHC, CHC/TGY"

You can't update CSC only (ODIN will show the error and will not proceed)

If you like TGY, you can try the following trick - write CHC (it has OZL CSC - N9860OZL1ATI3), after that use SamKEY to change CSC to TGY (it should work with OZL, and doesn't work with OZS), after that use ODIN to write TGY (except CSC), and after that - revert back CSC from TGY to CHC using SamKEY. I haven't tried it, just an idea.

________________________________________________________

End quote.

Thanks...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Limeybastard:
Thanks. So it would appear he's saying that you'd need to flash chc rom then use samkey to change csc to chc, or change csc and then flash to china rom.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] manager77:
Hi, guys! Has anyone The beta update one ui 3.0 for China N9860 model?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Hi,

It seems that we should flash (only the CSC ”CHC”) rom part (taken from ”N9860OZL1ATI3“ full rom), and then use samkey to switch the CSC to CHC, because we know that regardless of flashing only the CSC part (odin) doesn't set the changes in a permanent way.

Nonetheless the comment about the impossibility of flashing only CSC, due to an error returned by odin, will make the change impossible.

So, first I need samkey and some credit's to try it out, even not knowing if it will work (TGY rom, but with CSC ”CHC” and hopefully call recording active).

---------- Post added at 08:30 PM ---------- Previous post was at 08:25 PM ----------

To the best of my knowledge, there are no “Android 11 Oneui 3.0” SM-N9860 beta rom's yet (Snapdragon), only for the USA Snapdragon (single sim) variants, which does not apply to us (9860 dual sim owners)...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] manager77:
There is for CHC N9860 beta oneui 3.0 out...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Limeybastard:
Indeed on the first paragraph, not unless you have access to a Chinese sim card is what my understanding is then you don't need samkey just odin for chc flash and csc will change but I haven't seen this method for my own eyes. So can't confirm.

For those that want to change csc from tgy to bri I think no flash is required , just samkey method.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Hi,

Yeah, the sim Swap reset trick did work on my old Exynos Note 9, using a valid CSC (that exists within Note 9 Exynos line), in my case Thai Sim (CSC - THL), so my Dual sim note9 has : THL/TPH,THL/TPH

I'm going to order one SIM of each of 3 China mainland network operators (China Telecom, China Mobile and China Unicom) hopefully all or at least one using CSC (CHC), on ebay and try to replicate the trick on the 9680.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Limeybastard:
Keep us posted.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Yes, I will (rest assure).

But it's going to take some time because although already ordered (today), it will take between 1 to 3 weeks to arrive.

This is what I'm waiting for in the next few weeks:

China Unicom SIM (UK warehouse - so quicker delivery expected)

China Mobile SIM (HK warehouse - slower for sure)

I wasn't able to find a cheap China Telecom SIM card (only one, at an unreasonable amount, more than 20 euros plus shipping charges) , exception made to some (collection items) very old (year 1999) that I don't know if they will work or not (requiring manually cut, because no Nano or micro cuts).
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Status update:

Things are not going as expected :(

The China Unicom SIM shipping from UK is indeed an Hong Kong number (852), so I-m guessing it will be having a Hong Kong ICCID/IMSI/CSC (TGY), so it probably will not work as intended (I'm going to keep it nonetheless, just in case I need to go back to TGY).

The China Mobile SIM shipping from HK is now canceled by the seller (apparently due to corona virus pandemic postal services are not fully operational).

So, I'm now stuck again, but not deterred. I'm going to contact some friends in China, to source out a "local" China SIM card (+86) and ship to my country (don't know if it's possible, because I heard that passport is required to comply with China laws).

Anyone has suggestions on how to buy/order a local (+86) China SIM card?

Regards,
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Tell me something, I have many China Mobile Sims as I visited China in 2018. I haven't used any. And not sure if they pickup any network. Will they still work in terms of changing CSC to CHC if I put it in an reset my Note 20 Uktra N9860?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Hi Farehmani,

Yes it will, the SIM doesn't need to be fully active (it must be working / communicating) though. In fact I'm considering buying a collectors China SIM (never used - still unbroken from the big credit card layout) from ebay just in desperation...

Moreover, I have been using a Thai SIM bought in 2018 (never activated), for my Note 9 and Note 10 both Exynos ( Note 10 bought two months ago) for this Factory reset trick successfully, because "THL" CSC code has "Call recording" and "exist" within Note9/Note10/ and probably Note 20 (don't have one, so I can't try) Exynos variants. . .

In fact, I have been using it for my friends too ;) (borrowing).

Just make sure you do insert the SIM, before starting the factory reset procedure. And that the SIM is really from China, not Taiwan or Hong Kong. Its easy to check by looking at the printed ICCID number, if from Mainland China it will start with 89 86 ....

Don't spend the time if it does start with 89 and something else (without 86).

PS: if you are willing to try it out, you will save me a few Euros and few weeks/months waiting for a possible China SIM, and help the community too.

But remember, please do a backup using smart switch to an external USB disk, before resetting your phone ;)

Regards.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] manager77:
It will be cool to make this happend....
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Yes the numbers are from Mainland China of China Mobile +86 131 6241 ****
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Hi Farehmani,

Great news then, by the way are you familiar with the procedure?

When can you test it?

;)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Yes I am kind of familiar, and I can test it tonight or Tomorrow as I have asked my friend to send me the sim of active China unicom. You please advise procedire if it is anything different than

Phone currently at TGY/TGY/TGY

Backup Smart Switch

Insert China Sim

Factory reset

Edit: my Sim arrived. It starts with 89 :) and it's active.

View attachment 5137053
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Yes, you are right, more details here:

https://xdaforums.com/galaxy-note-9...-android-9-t3893239/post79807735#post79807735
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Duplicate post
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
What if Samsung has removed the CSC change feature through sim card, Thai Sim trick doesn't work on Note 10 now I heard.?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Well, it worked on my wife's Note 10 plus 12GB 512GB (Exynos) Dual Sim version (although not 5G, neither Snapdragon variant).

But, it's a guessing game...

Until we try it.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
On let's Try It Tonight
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
I'm also searching for Exynos Note 20 Ultra user (here in Portugal) just to try the "Thai SIM reset" trick, to see if it works.

Or trying to do it on a Demo unit (store).

---------- Post added at 02:41 PM ---------- Previous post was at 02:41 PM ----------

Keep us all posted , and good luck ;)...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] carlitobahsoun:
guys according to this thread , i think that will work on exynoss devices

SIMPLY DOWNLOAD GOOGLE PHONE APP , DIALL THIS CODE AND ALL CSC APEAR.

*#*#27262826#*#*

I DIDNT TRY AS CANT WIPE DEVICE NOW.

LINK THREAD

https://r.tapatalk.com/shareLink/to...1&share_fid=3793&share_type=t&link_source=app

thanks [MENTION=10092915]adeltamimy6[/MENTION]

he confirmed : WILL WIPE DEVICE.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Yes, true.

Any of the two ways of changing CSC you described (SIM swap trick or Phone special code input "when supported") will always end up in a Factory reset upon phone reboot.

My recommendation (whenever trying to mess with CSC), do a backup first (or you will be sorry).
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] carlitobahsoun:
yeah that what i post ir will wipe device , mean will factory reset . hope i helped
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Bad News!

SIM Swap Doesn't work. I tried it twice. What I did was.

I replaced My Pakistani SIM with China Mainland Unicom Active Sim. (It asked me to enable Roaming) I did it. Even tested by calling from Chinese SIM.

A message popped to enable local battery Policy.... I tapped yes.

Already took Backup on Smart Switch PC and then Did a Factory Reset (while Chinese SIM Inside in Sim Tray 1)

The reset process happened and then I received a few Chinese Unicom Welcome SMSs, again asked to enable local Battery Policy and then started normal setup procedure.

After all done checked the phone app. It didn't have Call Recording active.

Also checked CSC and they remained TGY/TGY, TGY/TGY.

Sad.

_____________________

Tried the Google Phone Trick. It is real. BUT it can only switch between TGY & BRI. Not CHC. Screenshot attached for reference.

I think this also confirms that TGY does not have CHC switching option. It can only switch between BRI and TGY. This is not good. That's why SIM trick didn't work as well.

Any further Input from anyone please. Let's take it to the end and at the end we must get Native call Recording active :) keep digging.

View attachment 5137541
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] chetbiz:
Sucsesfuly changed CSC from TGY to CHC

Guys have a great news! I have successfully changed the CSC to CHC from TGY on TGY rom. My steps:

1. On latest TGY rom changed the CSC to CHC with SamKEY (got confirmation ok) after this step the Service provider still remained TGY/TGY,TGY/TGY and no call recording.

2. Factory Reset your phone (remove any screen locks and google account)

3. Flash CSC (not home_csc!) file from the latest CHC rom with odin.

4. The phone reboots and enters recovery mode, don't exit and do Factory Reset and Wipe Cache, after that reboot your phone.

That's it, your phone on CHC/CHC,CHC/TGY region with native call recording and on TGY rom with all the google services working including google assistant, Samsung pass, Samsung health. :D:D

Enjoy! )
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Wow!

My Question

is it Compulsory to change the CSC from TGY to CHC with Samkey?

Also with Odin do we only flash The CSC file (CHC). Does it really only flash the CHC CSC?

Is anything changed to Chinese Only Apps because when I swapped the SIM many things started popping up in Chinese. Even Samsung member was not opening said not supported in your country. Bixby Translate was also Changed to Powered by Baidu even in TGY ROM.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] chetbiz:
Yes you have to change with Samkey( I bought credits here-> phoneunlockservice.com, you have to buy at least 9 credits its about 15$)

Yes i flashed only the CSC file(CHC) (not the HOME_CSC!)

Nothing changed to chines apps the rom still TGY, the only thing that I noticed that the chines keyboard is added but its a minor problem

:)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Bro, Samkey doesn't have N9860 in its supported device list.

Also I am unable to find 9 credits Purchase option on phoneunlockservice.com. pls advise.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] chetbiz:
Its supported, download latest version here - https://samkey.org/download.html

Bought credits here - https://www.phoneunlockservice.com/order.php?serviceId=3561 ( like I sad minimum is 9 credits)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Hi farehmani,

Apologies for the delayed response.

First, thank you very much for taking the time to try the "Swap trick" and sharing the results (appreciated)

About “chetbiz” findings;

That is interesting, so after Samkey, no change on the "TGY/TGY, TGY/TGY" on the “About phone“ screenshot? Kind of what happened with the card swap trick, right?

What about trying the last step "chetbiz” did (when using Samkey method), I mean using "Odin" to flash CHC from the latest China ROM (not home*, because it would result on a dirt flash)? Maybe that's what is missing, no?

Alternatively (if the above doesn't work) we can try something similar to the usage of "Samkey" and "SIM Swap trick", we could try the "change CSC Windows" app mentioned by tribalfs member, stated on the beginning of this thread.

[MENTION=1113385]chetbiz[/MENTION]: thanks for sharing your results with Samkey (it confirms what they ”samkey support staff” told me during our chat), and it’s good to know we have a solution [emoji6] [emoji106] now...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
I'm convinced with applying the last so method. Although I have bought samkey credits but csc change with odin is convincing

---------- Post added at 07:03 PM ---------- Previous post was at 07:01 PM ----------

I'm convinced with applying the last step method. Although I have bought samkey credits but csc change with odin is convincing. Can you try this fjorger?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
My thoughts exactly ...

Because otherwise, "Samkey" method wouldn't require the "Odin CSC CHC flash" to fully apply the change, but it does.

To the best of my knowledge, the "Swap SIM trick" that we tried on the 9860, it does not work "alone" like it did with my old Note 9/10 Exynos, because the 9860 does not have a multi CSC ROM/code (ie: "OXM" on my Note9, etc), instead it has "OZS_TGY".

Yes, I can try this (without using Samkey and Change CSC app) first, but unfortunately I need to wait a few days (maybe two weeks) for an very old CHC collectors SIM card (no longer active) from UK. I have none yet.

Or are you talking about only changing/flash the CSC from Chinese ROM (using Odin) without using (SIM Card Trick, CSC Change App, Samkey) first?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
Yes, I am talking about only Flashing Your TGY Rom with ”CHC” CSC with Odin and then it'll take you to recovery where you will factory reset your one and I think it must change CSC to CHC and rom remains TGY.

I hope it doesn't brick the device and later it doesn't restricts some apps to China only. Lastly it keeps updating its ROM as new updates come monthly.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Understood,

That is doable (without the need for a +86 SIM card), but like you said it's risky (I heard over this forum some bad stories about CSC mix/changes going death wrong).

Let me try and do a full backup first (using SmartSwitch - it takes a lot of time), then I will flash CSC (CHC) from China ROM, hopefully this week still (I will post the results).

Anyone has had experience doing the "Frankenstein" TGY ROM with CSC from CHC China ROM merge? Any advise?

Thanks in advance...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
Thanks for the tip!

One question/doubt, I see that you now have CHC/CHC,CHC/TGY, correct?

That means you have all CSC set to "CHC" but the "origin" - last one (which is ok, it's still a HK phone).

Strangely on my Note9 Exynos (Thai SIM trick) I ended up with THL/TPH,THL/TPH -> So one of the sim's CSC still points to TPH (Portugal) and the other to THL (Thailand) which is good (due to carrier customization's), aren't you afraid of having less coverage/compatibility issues, by having all to CHC?

I'm wondering if all the "5G" problems reported on the 9860 aren't related to the fact that it's all TGY/TGY,TGY/TGY.

Regards,
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] chetbiz:
Aftet tests, I have no problems with 5g and 4g/4g+, including agrigation, so I guess in my case at least all the coverage are correct, any way you can customize netwotk coverage through service menu's *#*#27663368378#*#* and *#*#2263#*#*

Interesting that my location service works with gnss and not gps and I noticed that it works even better :)

So for now I dont have any problems at all on TGY rom with CHC region, very happy with the resold.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] farehmani:
SUCCESS! SUCCESS!

I have Converted my CSC to CHC on TGY ROM :)

It has been confirmed, Samkey CSC Change Step is not necessary as it doesn't supports N9860.

Simple steps to Change CSC to CHC

While being on TGY ROM (Latest)

*Download Latest CHC ROM

*Extract CSC file CHC (Not Home_CSC)

*Put your phone in Download Mode

*Flash CSC CHC File only

*Phone will boot Into Recovery

*Wipe Cache and Factory Reset.

*Viola! You've Successfully changed CSC to CHC.

Native Call recording is active so is Data Counter on the top Right.

Everything Works Like a Charm Except Samsung Pass. It is not There. Whereas our buddy there confirmed its working. Well It is not! And its gone. Further Bixby Translate is now Powered by Baidu instead of Google. (Help how can I change it). Also weather widget is not correctly picking up my location. Manually I had to put in my city and country. Rest Google services and maps and others work fine.

I miss Samsung pass already. I want it back.

Now!

While setting up the phone from Start after CSC changed to CHC Google Servers are Not Reached and it timed out so I had to login to Google account later after phone booted.

Rest all is working. Will share if I fine something different. For know I got TGY ROM and CHC CSC.

:).
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] chetbiz:
Dont known how it worked for you, tried couple of times to flash only the CSC file from CHC rom and got an error in download mode, the phone didn't restarted to recovery and I had to flash the hole ROM from scrach, by the way I'm not the only one that tried to flash the CSC file from CHC rom,

But hey if you succeed I'm glad there is a simpler way :good:
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] fjorger:
You are right, I heard all over this forum about the ODIN errors while trying to flash the CSC (CHC) only, over a TGY Rom.

I'm going to try myself later on (already thinking on how I will miss Samsung Pass) just to see if it works with me.

Nonetheless, maybe the fact that a swap SIM trick (using a China Mainland SIM, did replace the ”Samkey” part of the working process) is the “differentiator“ factor, that might explain why it did work with him...

---------- Post added at 10:11 PM ---------- Previous post was at 10:09 PM ----------

Good news, congrats...

Can you tell us the SW version you end up with? CHC/CHC,CHC/TGY ?

Please keep us posted about any other side effects [emoji120]

Thanks.

Regards.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Limeybastard:
What do you mean Samkey csc change doesn't work on sm-n9860?As Samkey does work to change the csc on this device. I've already changed my csc from tgy to bri and back with no issues.
[MTCD Android Head Units General] Flosch_93:
Hi guys,

I found this to put packages on a white list so that they are not killed on standby:

https://xdaforums.com/android-auto/...to-whitelist-packages-mtcd-head-unit-t3765437

I just can't find Mtcmanager.apk in Android 10. Can someone tell me which * .apk has to be modified in Android 10 so that some apps are not killed in standby?

Greetings Flosch
[MTCD Android Head Units General] marchnz:
Is your unit an MTCD/E
[MTCD Android Head Units General] Flosch_93:
Yes, MTCD-LM
[MTCD Android Head Units General] xdamember2:
Hello,

I have not tried it myself, my guess would be to try incrementing

.registers 30

to 31. Good luck.
[MTCD Android Head Units General] Nomader0:
has anyone found a way to prevent running of last open app when waking up from sleep? Mymtcservice does not work on android 10 unfortunately..