yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
sorry bud, i was delusional this morning and had no focus

So, you have 12 CA combo's and are on fully stock firmware and csc?

Or are you on your rom still ?

This is kind of annoying, i got my speeds back but i'm tripping over how the stock CSC doesn't have any CA combos.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
I flashed stock csc with EFS wipe. The csc flashed properly but when the phone reboots to TWRP to clear the EFS, the operation fails cuz TWRP can't properly access the zip it needs to flash. But you can manually select the zip in /cache and install it.

I did that and everything looks like SKT. SKT animations, quick settings, etc. But I still see 12 CA combos.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Ok here's what i did to bypass that error in twrp.

TWRP > factory reset > bootloader mode > flash all four stock firmware files + efs clear , as soon as it's done i unplug it from the computer otherwise i get a blue error screen. Wait til it boots up. then go back into bootloader mode > twrp > initialize it > flash magisk > check CA combos upon boot.

If you can do this it will confirm if we are both experiencing the same end result.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
Unfortunately I'm limited in how often I can go around factory reseting my phone as it's my only functioning phone and it's primarily for work use.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
I understand. If anyone else with an N version can try it I'd appreciate it
[Samsung Galaxy Note 8 Questions and Answers] Sn0wR@pt0r:
FYI...quick side note of info that I learned talking to an old buddy of mine (from back in my Telecom days).

You all were referencing some settings such as "3CA" enabled/disabled, elsewhere in Phone Info, etc.

Found out that in the industry 2CA, 3CA, and even 4CA doesn't reference multiple "channels" on 4G/LTE, as much much as it represents multiple "carriers" (the aggregation of 2 carriers, 3 carriers, etc.).

So while I'm not sure exactly how it works, my guess would be that it combines/aggregates signals from different "carriers", if they have made an arrangement or agreement with each other...and if it's enabled properly.

Thought this was interesting given what we've been learning here...so hope this lil tidbit helps somehow or another.

:cool:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Playing around with settings again.

I have no CA combos right now

i went to Service Mode > UE > Setting > NAS > Network Control > Band Selection > changed from auto to LTE/GSM only

Now i have 5 CA combos.

Ran a speed test, got 50+mbps phone stayed on band 4 the whole time.

Screen shot attached showing info screen.

VLD band now is blank , before it was filled in.

CA still shows 0 (screenshot taken in the middle of speed test)

Having CA combos doesn't necessarily mean CA will work i assume at this point
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
I would think the name "Carrier Aggregation" would suggest this, although there seems to be a misunderstanding of what a "carrier" is here. A carrier is just bandwidth allocated for carrying data.

http://www.radio-electronics.com/in...-lte-advanced-carrier-channel-aggregation.php

http://www.3gpp.org/technologies/keywords-acronyms/101-carrier-aggregation-explained
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
yeah I didn't have time to do it today either and I need to have it functioning for work starting Friday afternoon so I will try to do some testing tomorrow. I could always fall back to the Note 5 I guess but the battery life on this 8 is so much better that even with poor signal and having to reboot for Wifi Calling I still prefer it :D
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
I just got my 10,000 mAh zerolemon today. I'm not sure what this "battery life" you speak of is.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
So I change the service mode to LTE only. Ran a speed test and watched LTE Discovery. It jumped from band 2 to 4 , infoscreen shows CA0 but vld band is filled in. Still have five CA combos.
[Samsung Galaxy Note 8 Questions and Answers] Sn0wR@pt0r:
[MENTION=6170708]jooniloh[/MENTION] - Oh, I don't disagree at all...regarding the definition of "carrier".

He was just explaining it to me the way it had been taught to him, where "carrier" referenced AT&T, T-Mo, etc...as if they often worked together to provide better "signal/bandwidth" in common poor performing areas of reception.

Now this was not in regard to having 7 vs 12 count of CA's showing up, where in that instance we are referring to Bands/Channels combining, like masri1987 has been talking about...but rather the 2CA, 3CA (and now 4CA) option being enabled or disabled, where 2CA meant 2 as in AT&T & T-Mo cooperating together and so forth. We didn't get very deep on it though.

I can't confirm this info as fact though, since I don't know who his course instructor was (aside from being some fellow Telecom employee)...so as with anything, garbage in/garbage out, when it comes to info being good or bad...right?

So take it with a grain of salt for now.

Definitely a new angle on explaining that specific setting in Phone Info though...whether or not it's correct.

Wouldn't be the first time carriers made backroom deals, just like back in the days of "roaming agreements" from County to county on the old analog services...lol.

Have a good night you all! :cool:
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
I also now have volte somehow
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Another thing to watch is the BW (bandwidth) of your Band 2, it shows only 10 mHz which is pretty small. I believe the bands can use up to 20 mHz per band which of course would give a lot more overall bandwidth (double in your case) for the data stream

---------- Post added at 10:34 PM ---------- Previous post was at 10:31 PM ----------

haha I prefer as thin/light as possible so those aren't quite for me, though the more than triple battery life must be nice. my Note 5 now lasts about half a day if used heavily, where the 8 even in it's current arguably not quite usable state still easily lasts me two days.
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
More than 4x. Remember it's a battery case so the 10K mAh is added onto the existing 3300 mAh :D
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Thanks, also what is VLD Band? Thanks for the education

---------- Post added at 06:53 AM ---------- Previous post was at 06:40 AM ----------

[MENTION=8569151]Kamikaze_Ice[/MENTION] i got around that blue error screen at 32% by doing a factory reset in stock recovery and reflashing everything again, making sure that the device is unplugged from pc as soon as flashing finished. But as soon as i modify recovery and retry it all over i face the same problem until i repeat the steps .

for whatever it's worth "rebuilding" the efs partition helped clear the sticking t-mobile csc, i am OCD like you too and did probably 3 full reflashes and still had t-mobile csc stick around and not the stock csc.
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I have the same band band 2 10mhz :(
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
how you are getting CA:1 and I can't lol
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I dunno I'm on att
[Samsung Galaxy Note 8 Questions and Answers] minhajmsd:
T-Mobile only has 5 MHz bandwidth for Band 12, 10 MHz for Band 2 usually and up to 15/20 MHz in very few areas and 20 MHz for Band 4 most places.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
I haven't seen mine below 20 MHz anywhere so far, but am also usually on Band 4, so your statement holds true.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
ya i get 20mhz on band 4 too, i usually don't get band 2 in the house but it pops up in certain spots where it's stronger than band 2

---------- Post added at 06:27 PM ---------- Previous post was at 06:24 PM ----------

@kalm_traveler

Is there anyway you can make the tmo csc as active and keep my skc as original CSC? Because every time I flash tmo CSC it removes skc completely. Original CSC remains blank in phone info
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
If you can find out where the app is getting those fields from, yes I'm sure that is doable. the CSC thing is pretty flexible. I made a custom multi-CSC as a test that was stock N950N OYN multi but with TMB grafted into it and that worked just fine too.
[Samsung Galaxy Note 8 Questions and Answers] naruto.ninjakid:
How can I verify that carrier aggregation is working? I have a exynos s8+ by the way. Is this slowness issue also expirienced on the f models? If so I my have to hold off upgrading to a note 8.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Ill look up those fields later today, can u share that test csc ?

so wait, u have s8+ exynos with t-mo right now ? how are your speeds?

Go to *#0011# during speed test and look for where it says CA:1 or CA:2 or CA:Activated
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Sure, I'll see if I still have it. The only differences from stock are that it still sets the EFS/IMEI/mps_code.dat and omcnw_code.dat and /system/omc/sales_code.dat all to TMB so that it loads the T-Mobile CSC.
[Samsung Galaxy Note 8 Questions and Answers] naruto.ninjakid:
I have a exynos s8 plus and a tmobile s8 plus. Will compare in the same location. Looks like the exynos s8 plus is getting aggregation with band 4 and 12.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
My dude. I need that set up. This is gonna drive me awol
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Well, if you can come up with a better explanation I'm all ears.

My LTE was "on point" for the first 4-5 days, then suddenly has not been ever since, regardless of ROM, restoring stock EFS partition, full Odin factory reflashing, etc.

Before I started trying to resolder and reflow the antenna connectors on the usb/antenna PCB, applying pressure on one of them in a specific direction made the LTE signal strength (and speed) jump up to equal to my Note 5.

I think I need to add solder because at first I used a desoldering braid to pull as much as I could off the antenna connectors which may have just made the problem worse. Reflowing seems to have fixed my mic that died, but without any solder on the antenna connector to 'reflow', nothing changed there.

Currently, disconnecting either or both of the antenna wires from the lower PCB does absolutely nothing to the LTE signal strength. Doing this should drop it drastically, but it is already super low. This seems quite obvious that the LTE radio is not getting any physical connection to the antenna in that circuit board.
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
That's what I don't understand. I heard the N doesn't have 1700mhz band 4. When I briefly searched a while I found the same answer. But a couple of days ago I searched the N again & lots of sites say it does support band 4.

Around here my Note 8 is pretty much always on band 4. I hear band 4 1700mhz AWs is what tmobile mainly uses & is fastest (when available). I was just wondering if when you guys are having these issues if you were on band 4 or not.

I've only been checking recently but I've never seen mine connected to band 2 or band 12. But I don't live in a rural area & I haven't check while inside a big building.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Not sure where you heard that. Everywhere I saw (including the service mode menus) supports what is found here: https://www.techwalls.com/samsung-galaxy-note-8-sm-n950-model-number-differences/

For the N950N they list:

4G FDD LTE: LTE Cat16 700/800/850/900/1700/1800/1900/2100/2600 (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28)

4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
Where are they saying this? Is it in the Note 8 forum? If it is I must be blind or something, I don't remember seeing a thread about it.

Yeah I've got Kalm_Traveler's TMO mod installed too, currently TMB/TMB/XEU. From Clove mine came as XEU/XEU/XEU out the box on QH9. After I did the OTA update to QI1 which I'm still on now, oddly it changed to France XEF/XEF/XEU.

---------- Post added at 09:49 PM ---------- Previous post was at 09:44 PM ----------

I read it here on XDA and some even say the N is not good for Tmobile because of that & is why I didn't consider buying one, I've even said it myself once or twice cause that's what I read. I better go back & change my posts. Funny cause I did read a site tbat said no 1700mhz but Samsung themselves say it does.

No matter but glad to have that set straight.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Yeah I definitely am on band 4 most of the time. Also I still have my Note 5 and carrying it around it switches to the same bands in the same areas with the Note 8. I am going to try to resolder my antenna connectors but if I can't get strong signal back I will have to wait to buy a replacement board once they are available - and that will 99% for sure fix my LTE weak signal problem as it was great for the first week.

I even went through service modes on the 8 and 5 side by side to see if anything was set at all different and could not find anything different on the 8 (all the settings that exist on both were identical), not to mention the physical proof that something funky is going on with the antenna connectors on that lower board.
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
I'll take my Note 5 out one of these days & see what kind of signal strength I get with it & compare with my N8 (I only have one SIM so no side by side comparison). The best I got so far when I checked with my Note 8 is -63dBm.

I thought I was going crazy, now I know why I got confused. On Sammobile for the N it doesn't actually say 1700, instead it just says AWS, where as all the other bands it does list the mhz. I'm wonder if that whybthose other guys on here are saying no go for 1700. Again, whatevers, you confirmed it connects to band 4 and that's all that matters.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
Yep definitely on band 4
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
BTW, how good are you with a soldering iron & do you have a temp controlled soldering station? Often I just reflow with my soldering iron. It's easier for me but if you don't have experience with small smd stuff it you might cause more harm than good. The only time I reflow solder is if it's a small bga chip or an ic or led that has a solder pad under under it.

I've never used a cooking oven to try and reflow either. If I don't have access to a hot air station (like at home) I just use a butane powered pencil type iron with the heat attachment. And did you use flux? That makes a big difference in bringing the melting temp lower even if the solder joints don't look like they have any oxidation on them. They most definitely do. In fact, I always use flux no matter what.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
I don't have one yet - it's on my Amazon to buy list after this fiasco. I've been making do with 2 different cheapy soldering irons, a 15 watt and a 40 watt. No flux either - I will have to look into that. To be honest the only soldering I've done prior to this were modchips in old Playstations and Xboxes, and some repairs to old video game consoles by pulling the old solder off and redoing the joints with fresh lead-filled cancer-causing stuff. It sure conducts well though!

If you know of any good sites I should check out or videos to watch I'm always up for learning.
[Samsung Galaxy Note 8 Questions and Answers] shouren04:
Unfortunately I don't. I pretty much learned from experience. I started soldering like 25 yrs ago. Starting messing with SMD stuff probably like 15 yrs ago. And my last job I worked in electronic repair so I did basic PCB repairs daily for like 10yrs. I never messed with large BGA chips though, that requires expensive computer controlled IR reflow stations & specialized techs.

Everything these days in electronics is made with Pb solder (lead free). Rework on lead free solder is not as easy as when they used leaded solder. I hate using lead free solder & I refuse to use it on my own stuff, higher melting points & it's weaker. OEMs are required to use it for environmental reasons.

Then there's flux types, I still use rosin based flux. Now a days there's no clean flux & water soluable flux which I find doesn't work as well. But with rosin based flux you have to make sure you thoroughly clean it off.

I'm no expert but I know enough to be dangerous. I'm sure there's lots of videos on YT these days, just have to weed out to guys who know what they are actually doing & guys who just mess around. If you want to get into it I woukd say get a hold of some scrap electronics that use SMD components & practice on that. A PC motherboard would be perfect for messing around with.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
Makes me.feel good about my purchase
[Samsung Galaxy Note 8 Questions and Answers] Ian the Great:
I've flashed multiple firmware and changed CSC to T-mobile trying to fix but nothing helps.

Current build: N950NKSUAQI2 , Baseband: AQI7

XEU

You can tell the original carrier CSC by looking under Settings/About Phone under "Service Provider Software version" in Its the last code of the 3.

For example, my Clove UK bought device with T-Mobile CSC reads: TMB TMB XEU
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
So if it's the board then why is it that myself, my friend, you, and a couple others I'm in this thread have speed issues?
[Samsung Galaxy Note 8 Questions and Answers] Limeybastard:
I think we should run some "rough" comparisons in relation to dba signal strength and thourough put.

I'm thinking use LTE discovery with speed test.
[Samsung Galaxy Note 8 Questions and Answers] shiftr182:
Hi guys. I have an S8+ from clove, had the same issue. I was pulling like 2mb up, and 3-4 down here in Boise. I used this https://www.reddit.com/r/GalaxyS8/c...8_how_to_get_carrier/?st=j8uge45l&sh=794a6303 and the changed my band by using *#2263# to lte/gsm only and now Im pulling 30+ down!
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I think the N950N just has a crap antenna like kalm said cause my speeds are also all over the place from 20,35 to 60 in day time rerunning test within 5 min spans mine goes from 98-108 dbm from band 5 to 12 sometimes 7
[Samsung Galaxy Note 8 Questions and Answers] Limeybastard:
Post facts not heresay.
[Samsung Galaxy Note 8 Questions and Answers] TheUndertaker21:
thank you for that

i def have been having bad LTE gonna try this and see
[Samsung Galaxy Note 8 Questions and Answers] DeeXii:
Worthwhile shot on the ADB front but it made no difference.

Im getting 150mbps download with a 20mbps upload on my Note 5 right here with a nice solid constant speed.

Next to it is my N950F and its getting 20-40mbps download with less then 1mbps upload and the numbers bounce all over the place.

Something is wrong. My friend's phone yields the same exact results. :(
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
seems like a international variant problem on F/DS/N models .Before I returned my Snapdragon note 8 I never dropped any speed at all LTE speeds were always on point until I returned it and got the N model
[Samsung Galaxy Note 8 Questions and Answers] naruto.ninjakid:
The tmobile S8 plus is from work lol. It looks like I'm getting the same aggregation as the exynos s8 plus. Speeds are similar for both devices as well. Being in the greater New york area I never get above 25mbps I believe due to congestion. So those 100mbps and 60mbps are great to me lol. Here is the screenshot from the tmobile s8.

I was more curious about the 3x carrier aggregation. Wasn't sure if my exynos device was even doing any carrier aggregation.

---------- Post added at 03:30 PM ---------- Previous post was at 03:02 PM ----------

It would look like from my previous post that the S8 Plus Exynos ( G955F) and the T-mobile version I have are both carrier aggregating with at least 2 bands.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
so just changing those files to TMB in text editor will give me wifi calling and the such?

Ya i'm not getting any of that. no carrier aggregation and i went to a spot on sensorly app that shows very good signal, and pulled 96mbps on band 4 only. CA:0 remained that the entirety .
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
ah sorry, no you still need to physically have the TMB CSC folder, as well as the missing binaries and libraries from the F variant.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
k , well, not sure what else i can do at this point besides reflash ur tmo csc and play around with more settings, do i need to take a video of my device during speed tests and what not? I am desperate to figure out why with ur tmocsc the signal drops and speed sucks but i get carrier aggregation lol
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
I'm not sure - going to try your full factory wipe/reset with Odin again tonight and see if I can mirror your success. I noticed that mine still has some bootloader stuff from the 950F ROM so when I Odin'd last time it didn't completely set me back to stock.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
ok, i made a video to show exactly what's going on when i flash kalm's csc.

I had skc csc on simple rom not getting carrier aggregation, getting up to 92mbps (shown in video in past results).

We gotta figure this out . I never see signal drops on stock csc.. something else is going on within the modified csc file that's changing the parameters on which signal is processed or something of that nature, i'm not that educated to say for sure, just making a observation

https://www.youtube.com/watch?v=HxU2xtI0i9U&feature=youtu.be

---------- Post added at 11:33 PM ---------- Previous post was at 11:26 PM ----------

[MENTION=8569151]Kamikaze_Ice[/MENTION]

flashing the sec_omc.zip doesn't change my csc, i'm stuck on tmb csc after odin flashing the stock csc file
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
did you ever try flashing tmo csc but disabling bands 2 and 12?

---------- Post added at 17:49 ---------- Previous post was at 17:45 ----------

I explained exactly why this behavior happens like 2-4 weeks ago on some thread.

For some reason, what i've seen (you need to use multi window to monitor 0011 or some networking tool while starting a speedtest) is that the phone idles on band 4 and when anything demands data like a speedtest, CA gets activated, BUT the primary band switches to something like band 2 or 12 (this happens on every networking tool at the exact moment the speed nosedives in the speedtest).
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
i chose LTE only preferred band 4, got decent speeds but didnt stop the phone from jumping to 12 or 2.

12 is the worst in my area, speeds are around 2mbps on 12 only. 2 and 4 are good, 4 giving me up to 90 ish mbps (fastest I've seen but not on t-mo csc ever)

So i guess i'm better off on the korean csc since it doesn't jump off of band 4 when speed test is done. ?
[Samsung Galaxy Note 8 Questions and Answers] jooniloh:
don't use preferred band. disable 2 and 12 and you should experience exactly what I did. that should confirm what your phone is doing beyond any doubt.
[Samsung Galaxy Note 8 Questions and Answers] masri1987:
k i'll try that when i get back to where i want to be,

Right now i just flashed all four odin files, efs clear + repartition +nand reset, booted up, no SK telecom boot up, phone is still in english (supposed to be korean). new sk telecom stock apps i haven't seen before.

Phone info shows stock csc as TMB. , ran speed test, 25mbps, i have over 30 CA combos now somehow , and no carrier aggregation still .

as usual, nothing makes sense