yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
ok i'm home now

Let me give y'all a synopsis

N950n device running stock SK Telekom rom.

Speeds are stable, , i am not getting a complete signal drop when running high demand downloads or speed tests. Carrier aggregation is disabled, it's only using one band at a time, furthermore there is no "LTE +" ever.

Previously with T-Mobile CSC and 950f rom, (and evenwith the built in CSC of 950f rom like nemesis ) i get carrier aggregation but at a steep cost of signal strength and battery life, and 90% of the time the carrier aggregation isn't getting me nearly the same speeds as the Sk Telekom firmware is getting.

I've uploaded a video to fb , pics attachments to xda app, no errors unlike previously.

What i'm gonna do next is flash Nemesis, then do a ODIN flash of the SK Telekom CSC.

What y'all think?
[Samsung Galaxy Note 8 Questions and Answers] Sn0wR@pt0r:
[MENTION=2694397]masri1987[/MENTION]

Remember...you originally had FW from LG Uplus on your N-model, instead of the SKC...I'm wondering if testing with the LGU FW would yield any different results or not...thoughts? :confused:

Either way...sounds like this testing is providing a wealth of previously unknown info regarding these Note 8's...and it appears you are getting much closer to narrowing down the main contributing factor of the degraded speed issue. :good:

I can just feel the suspense building from here going forward...lol.

Very curious as to where this all finally ends up.

:cool:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
yes it was LG Uplus, i didn't go with it because i figured why not try a diff SK Telekom provider firmware (it's all the same release date and firmware version # anyway)

Should I test LG UPlus firmware?

What i can do is get bak to Nemesis, and download the CSC's from UPlus firmware and STK and test those on a custom rom.

On a side note: Band 12 SUCKS! so freaking slow. The phone is def geared more towards preferring band 4 and 2 over 12 on STK firmware.
[Samsung Galaxy Note 8 Questions and Answers] iunlock:
:good:

The next goal would be able to get good speeds with CA combo's / Carrier aggregation on?

Great stuff. Thanks for the updates. This is definitely a few steps forward....

Progress is good...

I'm ready to flash away and try different combo's myself..... Can you flash the N firmwares onto the F phone and perhaps mess around with the different csc's to see what works better? Or will Odin reject it? I'm willing to try...

Downloading the SK Telecom firmware now...

Thanks for the updates [MENTION=2694397]masri1987[/MENTION]
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
If I'm not mistaken Odin will not allow you to flash a rom that is different from the phone. But I believe you can flash the rom with TWRP by converting it to a flashable zip.

But if you do get it to work, please.let us know how it goes.
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
I would run it the same exact way it is currently over the next few days. There are other variables at play here and a day or two will rule those out. :)
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
What did you do differently to make it get speeds like that?
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Ok,

So I did clean flash of Nemesis. It has France as country code, using CSC from F model.

Speeds are still good.

And the band info screen still shows 0 CA combinations.

, flashed SK Telekom CSC (LG U+ CSC has same file name btw)

Speeds are good and consistent, no signal drops.

one thing i want to urge and stress is that my signal isn't dropping during high data demands, furthermore, previously, when signal drops during those times, it's when the band is switching, this isn't happening on the Korean CSC (i might be using the wrong verbiage to describe what i'm seeing but there is zero band changes during downloads , vs t-mobile csc plenty of band changes, signal drops, and overall instability)

We have made tons and tons of posts now, i think someone else needs to verify my findings by doing the same, I know Kalm can't because he might actually have a physical Issue, i think he's the only one here with a N model besides me..

If i have to forgo the t-mobile features like wifi calling and volte to gain a stable single and data connection then so be it, sucks but this is the life i chose lolol
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
Nothing really. In case you anyone forgot, I'm the only guy in this thread not experiencing what you guys are.

Yesterday I got the fastest speeds I ever got on my Note 8 or my Note 5 or any phone I've ever seen in person around here, 93mbps. I posted yesterday in post #168. In post #172 I explained exactly what I have done to my phone since I got it, nothing special.

Today I passed by the same spot where I ran those tests yesterday & got over 100mbps. However I did make one change between then & today. I've been running an older version of Speed Test, 3.2.7. Last night I updated to 3.2.34. Usually speeds are better at night, less network traffic. The tests I ran yesterday, 93mbps max, was at night. Today when I got over 100mbps was during the day. I really don't think I'll get even higher speeds at night now with the updated version by I'll try if I pass by there at night again.

Now I'm not sure if the updated version I'm running had an affect on the speed results but I noticed my speed results now seem to show much better ping than before. I'm not sure if this updated version is just reporting differently or if it is "accurate". Or maybe this updated version has an updated list of servers? I don't know. But the version I'm running now is still not the latest version available.

---------- Post added at 06:03 PM ---------- Previous post was at 05:49 PM ----------

For me, I didn't not notice a change in speeds when I installed Kalm_Traveler's TMO mod but again mine's always been working fine. Yesterday I confirmed for KT that my phone's CA settings were still the same without his TMO mod installed.

KT had a thought that maybe it was the network that sets available CA combos. But even if that was true or not, still doesn't explain why my phone still shows the same CA combos with the TMO mod installed & why your phone is now working better without the TMO mod installed. WTH is going on! Lol

I prefer to have KT's TMO mod installed but it's not even for the wifi calling or VoLTE. I never use wifi calling & I can't use VoLTE. Ever since my Note 5 when they turned on VoLTE around here I have had issues. I figured after 2 yrs VoLTE woukd have improved around here but nope, it's still the same. Dropped calls & randomly takes for every to make or a call or won't go through at all. I just like all the various features the TMO mod gives me.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
i followd this to find out if CA is on https://www.reddit.com/r/GalaxyS8/comments/75ru94/root_exynos_galaxy_s8_how_to_get_carrier/

"3DL CA Enabled/Disabled". was enabled, so i disabled it, rebooted, ran speed test, 30-ish mbps where yesterday morning on my couch i was getting 9mbps. Even getting 41mbps at one point i imagine if i move to the kitchen it will even be better but i'm lazy right now lol Second run got 48mbps

I monitored *#0011# and i saw it jump from band 2 to 4, got 25mbps on that run, but CA:0 remained consistent the entire time.

I dont see why you can't simply flash the N CSC instead of the entire firmware? When I flashed the Nemesis ROM it had F CSC.

I agree, my OCD won't let me accept a one day run, but i was in the same exact spots as yesterday, gym, gym bathroom, barbershop, and speed tests were considerably better, and more functional and stable.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
All but the last test were on band 4.

All sitting on the couch at home where just let than 48 hrs ago I couldn't even get more than 9mbps

One thing i should've tested was kalm's t-mo csc on stock N rom to see if the behavior duplicates :\
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
That reddit page says to set to Cat 10, CA Enabled, & 3DL CA disabled.

Mine is set to Cat 9, CA Enabled, & 3DL CA Enabled.

I'm not touching my settings though.
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
No it isn't.

Odin will never accept a firmware that doesn't match the model number of your device.

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
I assume that's the same for flashing the t-mobile firmware csc in odin won't work either right

Just flashed light rom btw, i have two CSC's listed in phone info, the Korean SKT csc and DBT , what that mean?

---------- Post added at 04:32 AM ---------- Previous post was at 04:29 AM ----------

just had to check mine again, noticed no Cat was set, so i chose 10, ran a speed test on my couch, got 79mbps.
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
Do you by chance have any other T-Mobile phones in your house? What phone did you have before the Note 8?

Perhaps a old phone (a phone with CA)? or perhaps another person with a phone to compare?
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Hey , no other t-mobile phones in the house, although my gf might port over this week.

Previously before t-mo note 8 i have oneplus 3t, nexus 6p and so on, never bothered looking at speeds at home because i'm always on wifi but before i returned my t-mo note 8 i did a speed test and got 61mbps on my couch.

---------- Post added at 04:47 AM ---------- Previous post was at 04:46 AM ----------

I highly recommend that you guys odin flash your respective csc's from your firmwares zip, and test it
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
Flashing the TMO CSC will only work with a CSC flashing tool and require TWRP.

Flashing it through Odin won't work.

DBT is the CSC for Germany.

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
Any way to explain why masri1987 has good speeds now?
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Interestingly enough I have a WiFi calling button that doesn't work on simple rom. No csc changes massage

ya i wanna know too
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
I'm confused as sh*t.

He's using the German CSC now and it still works. :/

I'm at school now. I'll see what I can find out when I'm back home.
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
What is the bunny rabbit icon?
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Tell me what ya need from me and I'll help.

Profile icon
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
This should not be necessary on the note 8. It can definitely handle 3 way CA. I've seen mine do it.
[Samsung Galaxy Note 8 Questions and Answers] sefrcoko:
Agreed...for example I've successfully Odin flashed G930U S7 software on a G930P model...there are restrictions of course (i.e. we can't obviously just flash any firmware on any phone), but some cross-flashing works fine so long as we know which models work with which firmware (otherwise, brick!) :)
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
yeah that's clearly not the case, on my device i have zero CA combos in the band menu.

VS with t-mobile csc i have 7 or 10 combos ( i cant recall)

REmember i have a n950n
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
That's my point. Of course TMO csc flashed needs to be flashed. I'm talking about disabling 3 way CA. The point is you should not have to disable 3-way for CA to work. That reddit guide you linked to does not apply to this phone at all.

REmember i have a n950n too. otherwise I wouldn't be all over this and the TMO CSC thread.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
I keep forgetting you have the N version too.

Either way I'm not getting carrier aggregation with the German or Korean csc
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
why do you want to use german/korean CSCs? You need the tmobile csc for tmobile carrier specific features.
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
I'm confused, I thought CA was working for you now.

Regardless, I'm pretty sure the modem has a higher part of proper CA functioning.
[Samsung Galaxy Note 8 Questions and Answers] shadym1lkman:
Nah, theyve said several times no CA with the CSCs their using. Irrespective of ROM it never activates/engages.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
...

but thats the point... you need tmo csc for tmo carrier aggregation... what's the big deal here?
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
The german csc is the one that autoloaded w\Simple Rom.

Korean CSC i used when i flashed back to 100% stock.

The t-mobile specific carrier csc , is where i experienced the really slow speeds, failure to download geekbench from playstore, failed upload attachments to xda app and so forth (korean\german csc is getting me 20-50mbps where i was getting 2-10mbps on the t-mobile csc.

Furthermore, i noticed heavy drops of signal during speed tests of t-mobile csc , with korean\german csc signal is stable, i haven't seen the phone jump to -140 like it did with t-mobile csc.

CA:0 is still reporting back as CA:0, even when it jumps to band 2 (note, it only goes to band 2 when i initiate a different data session, once a data session is initiated on a band it stays on that band until transmission is completed then it will choose between band 2\4, i have only seen band 12 in the LA fitness bathroom on the Korean CSC), on the t-mobile CSC i would see it go from CA:0 , CA;1, then CA:2, actively jumping from all three bands, while signal drops every time it jumps.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
Any way I can get back on stock korean csc without restoring firmware? IF anyone makes a flashable, I'll test it out in my area, but I don't have the means to flash stock at the moment.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
I haven't found a flashable zip for the korean csc, i flashed the csc alone via odin
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
I can throw one together when I get home from work, I have everything extracted from the F, N, and U variants already.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
ayyooo this guy right here
[Samsung Galaxy Note 8 Questions and Answers] minhajmsd:
I just went back to stock fw as well (SKT one instead of KT which my phone shipped with originally) and I'm getting CA. Displays CA:1 when I'm not using data and CA:2 when I run a speedtest. Also the first time my phone has been able to hit speeds of 100+. I definitely flashed the SKT csc as well.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
here's an SKT CSC zip for you to try out: https://mega.nz/#!92pRXICS!aIiqVaM2ulzZHG1bbNe8wv0tpTj5i8rmEJjb3IyKM78
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
So wait.. Is the TMO Mod CSC the cause (or at least making it worse)?
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Not sure where you got that idea. Need I remind you of this screenshot which I took a day or two before my LTE strength and speeds tanked. Notice the T-Mobile 4G/LTE icon.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
will this be fully interchangeable with the TMO zip then? Meaning, I can flash this and the TMO zip back and forth with no issues?

---------- Post added at 22:08 ---------- Previous post was at 22:07 ----------

so what's going on with [MENTION=2694397]masri1987[/MENTION]'s phone then?
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Yes you can switch back and forth. This just replaces the OMC folder with the original contents, and sets the sales code on the EFS partition back to SKC to match.

I'm not really sure what's going on with his. I did full Odin back to stock and my speeds + strength were just as bad as they are right now (this included EFS partition restore back to where it was in that screenshot)
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
Well lemme test it out in a bit and I'll report back.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
sounds good, I tried resoldering my antenna connectors again tonight but it's so tiny that even with a magnifying glass I'm not sure that i'm actually having any effect. Put everything back together and still about 10 dBm worse than the Note 5 in the same spot on band 4. Minding that with this measurement a difference of 10 is actually 10x, so -80 dBm is 10 times stronger than -90 dBm. Can't chalk that one up to properly-functioning hardware at all. A 1-2 dBm difference I might be able to accept as 'hardware differences' but 10x no way José, something is not working properly.

Soon as I can source a new board I'll grab one and post back if it fixes the issue.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Are you on t-mobile?

Can you use shortcut master lite, get hit menu search code explorer , wait til it loads, scroll down to 27663368378 click it and hit launch 0 with root, click ETC > common > information > then choose band info.

take screen shot and share plz, should look like this in various forms.
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
I've seen some of you guys run Phone INFO. In case you guys didn't know, Phone INFO has a Secret Code launcher, thatxs what I've been using to launch hidden menus. It also has a CSC changer if you have the CSCs already. Same developer as Shortcut Master.
[Samsung Galaxy Note 8 Questions and Answers] iunlock:
OK so I've been talking with [MENTION=2996598]DeeXii[/MENTION] about this and he brought up some good points. Some phones that are the F Model are from South America and the ones being sold here in the US are from S.America. None of them make any mention of being opened (having to put in a SIM in that region to make a 5 min call etc.. like the UK ones do.)

So he suggested that I try to flash a few of the firmware's from that region and to try out some combos of using the TMO csc etc... so I'll try that.

I'm downloading two of the firmware's right now.... as soon as I have it downloaded, I'll get on with it...

Oh btw, the original reason for this reply was, "Would you guys be so kind to add your Note 8 model info to your sig since we have a lot of moving parts going on here with this topic?" haha ...thanks. :highfive:
[Samsung Galaxy Note 8 Questions and Answers] minhajmsd:
Mine has the CA combinations
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
Could you please check the CA combos on stock fw & after the tmo mod? I'm curious cause masri1987 had CA with the tmo mod but when he went back to original fw with no tmo mod he didn't have any CA combos.

But on my Clove F my CA combos are exatcly the same on stock fw & after the tmo mod.
[Samsung Galaxy Note 8 Questions and Answers] iunlock:
Ruling out all possibilities. With all the facts and data gathered so far, it is very reasonable to assume something software related.

You do notice that all the screen shots of speedtests so far with good speeds are all with really good reception. (Almost full bars)

This could very well mean that those Note 8's are connecting to a single band, which means that it isn't conflicting with any possible carrier aggregation, so of course it's going to have good speeds.

The issue here is when the phone is trying to grab onto more than one band and to make it work...often times in areas with low signal.

Therefore, seeing strong speeds when one has close to full reception isn't relevant to the issue we're having with carrier aggregation.

Cool stuff as I still have my phone open too, but you sure messing with with soldering stuff isn't making things worse? Especially not being able to see it even under a magnifying glass as you've mentioned... The stuff is pretty intricate indeed and those little gold connectors suffer greatly even from the slightest bend, causing metal fatigue.

Just making sure that in the event that something is affected by all the tinkering of the hardware that you're doing, that it doesn't add to the bias of your claims of it being a hardware issue, when most of us disagree that it is not.

Don't get me wrong, I love tinkering and that's my middle name lol... more power to those that do, but again, I really think you may have an isolated issue if it is indeed some kind of a hardware issue with the device itself.

.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Thanks, got rid of shortcut master :)

Done.

---------- Post added at 07:08 AM ---------- Previous post was at 07:06 AM ----------

Thanks, I dunno wth is going on with mine.

I'm willing to flash the t-mo mod back on and test out again
[Samsung Galaxy Note 8 Questions and Answers] iunlock:
Awesome haha. Thanks mate. :)

I'm sitting here waiting for these firmware's to download...sigh...so slow.

I have to keep reminding myself, "A watched pot never boils." LOL

:fingers-crossed:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
use samfirm. i got 3-4 megs per sec download
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
My speed tests screenshots that show 25-30mpbs is when I'm at home with mostly only 1 bar, sometimes 2. Mine will say CA Added showing bands 2 & 12 when I run a speed test.

Earlier I posted that it will only say CA ADDED when I run a speed test. That's not true, I see it switching on off pretty often.

But when it's showing good reception on my faster speed tests I have never checked CA. I'm out and about during those tests & I never thought to check. I'll check the next ti.e I go out & test.
[Samsung Galaxy Note 8 Questions and Answers] minhajmsd:
I think it might be because you have CA disabled. I turned 3DL CA off and i noticed that the combos dropped from 12 to 7.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
alright, well, let there be no more doubt, for me that is, when i use the t-mo csc from kalm, the same behavior re-occurs.

Side note: I have 12 CA combos now.

Going back to SKC CSC
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
That's good to know! I was wondering why marsi1987 only had 7 & a couple of us had 12.

Thanks for testing. Talk about strange! So many different results with everyone! For me I see no considerable change on stock fw or with the tmo mod installed.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Okay! Even more interesting I flashed [MENTION=4375750]Kalm_Traveler[/MENTION] skc CSC and the behavior hasn't changed. Still have 12 ca combos. Gonna odin back now.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Double post. Delete.
[Samsung Galaxy Note 8 Questions and Answers] iunlock:
In areas where I have one bar showing on the Note 8 is when it runs ~75% slower than my Note 5, Note 4 and Note 3.

When I had speeds of 25-30mbps on the Note 8, the other phones showed ~100mbps.

:good:

Interesting.... this is just crazy eh? LOL... we'll get to the bottom of it....
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Ya, if anything i'm really curious now more than ever.

Side note [MENTION=3217094]Deezy88[/MENTION] has a 256 GB 950n from wondamobile he got it yesterday, i think he flashed kalms csc too. and on t-mo obviously.

Edit: Flashed the SKC CSC via odin , restored my backup, speeds and signal is back to "normal"
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
Yeah, see weird!

For me my Note 8 since day one has always been a bit faster than my Note 5. At home where my Note 8 shows 1-2 bars & my Note 5 shows about half bars, speeds are either sometimes the same or usually around 10mbps slower on my Note 5.

In the area where I was getting 65mps with my Note 8, my Note 5 gets 50mbps.

The fastest I have ever seen on my Note 5 was 70mbps. Now on my Note 8 the fastest I have seen is just over 100mbps. I'll have to take my Note 5 to that new area I discovered where I got the 100mbps and test.

But none of this really confirms anything thing cause I can't test side by side. The closest I get to that is testing at home where I'll test one phone, swap tge sim & test in the other right after in the same exact location.