yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
That's where you're wrong.

Even the 950F Exynos Note 8 supports most required bands for AT&T, but it's the band combinations that aren't supported, not sure if they're hardware limitations or software limitations but that's it.

Like I said, try flashing the ATT CSC and see if it helps, if not, then I guess you're stuck with single band LTE because this phone won't support it.

You can try messing around with ServiceMode to change preferred LTE bands and probably band combos as well, if you're rooted.

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] Kamikaze_Ice:
That doesn't make sense at all. These bands are standardized, and as such have to meet specific regulations to be considered compatible. Unless you are trying to say that there are combinations of stated in said standards.

Look at standard for 802.11 as an example. A band is either supported or not. If combinations of bands caused issues at the hardware level, it would effect every frequency because it's analog data and crosstalk, combing, nulls and interference is going to happen and this is all considered when tested for compliance (along with many many more things. Again, see 802.11 for an idea).

You would change your preferred network to match your local area very similar to how the same would be done to optimize the frequency bandwidth by adjusting channel and frequency for WiFi from their router/modem.
[Samsung Galaxy Note 8 Questions and Answers] dec3169:
I have a couple questions

Thanks,

Bob
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
Dude I'm not getting into that much detail.

Anyone who's read into this stuff knows that it's because it can't use the specific band combinations used by AT&T because you're using a Korean carrier phone that's technically only meant to be used in Korea and Samsung deliberately has only enabled the carrier aggregation band combos used in South Korea and nowhere else.

If you don't believe me, while the phone is connected to 4G, open the dialer and dial *#0011# and post a screenshot here.

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] Flame Red:
I am not sure if you need a brand new nano-sim or not and if that is the reason for your issues. I would go to a ATT store and tell them you want to switch phones and get a new nano-sim. They will either not charge you anything or charge you a couple of $ depending how nice you are to the person.

You can try calling in using your cut down micro-sim, but I am not sure if the old SIM will cause issues or not.

When you call, just tell the friendly agent that you are changing phone to a new to you S7 and that Volte and Wifi calling does not work on it and give them your Daughter's IMEI. They will input it into their system and tell you to reboot and wait to see if it works. I had to call in three times before I found an agent that understood. So don't worry about calling in multiple times!

Good luck!
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Also having issues texting i get failed to send message errors ? anyone know why? edit*fixed it by entering the message center code
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
I am on the N950N I flashed Nemesis rom so It shows as a N950F now, and I also flashed TKKG1994's CSC Selection Tool for ATT CSC.

I have Volte and 4Glte icons showing now, but speeds still seem crappy.

Here are the screen shots of my phone that you requested. What can you tell me about them.

SInce all the info was too long for one screenshot I took TWO.

https://imgur.com/lzNmWox

https://imgur.com/fBSuF1r

Since I didn't want to make a second post. I will also ask here.

I used the OEM unlock option before I flashed my phone. The OEM unlock option is gone.

When I flashed my phone I did not root. I wanted to use samsung pay and play pokemon. Neither work.

I can't find the OEM lock feature since I flashed my phone - it's not under developer options.

Any suggestions for relocking the OEM unlock option? So I can at least play pokemon?

Thanks!
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Outside my apartment full signal strength I got but I normally pull 80 here so there you have it this is probably the max on the n950n on signal band LTE
[Samsung Galaxy Note 8 Questions and Answers] Kamikaze_Ice:
What is it on that screen that you're looking for? I have issues with AT&T on my HTC One (M8) which was purchased directly from their corporate store here in town that has them completely stumped (all data is always <1Mbps regardless of preferred network configuration. On their end as it only happens with any simcard assigned to my account. New/old/different sims, new/old line, new/old service plan(s) or different AT&T devices, none of it makes a difference.

I think we're talking about different things here.

I've honestly never heard of carrier aggregation before today simply because it does not apply to land surveying and state plane systems (read: GPS, rover stations using carrier signal for low data usage only).

After looking a little more into it, I still don't see how this effects the radios as far as compatibility goes unless these combinations would use Band 30 by default in a users locale (only band missing for AT&T with the Korean/exynos radio).

THIS reddit post seems to be a good outline for how AT&T works with their LTE protocols.

What I was commenting on was that it sounded like you were implying that combinations of bands on the device and active with your local carrier towers would cause other bands to suddenly become unsupported. And again, that doesn't make any sense from a hardware perspective. The bands of a device are listed as supported or not and are subject to the same situations regardless of carrier or region in this context. Samsung is a global company, so there is no reason for them to design such hardware features (software, especially carrier "provisioning" is a whole different story and not what I was referring to).

I'm confident this is why there are so many different radio firmware available for people like us (XDA and similar communities/users) to play with, which makes this something that can be addressed unofficially. That doesn't mean it will happen, like unlocking snapdragon bootloaders.

---------- Post added at 08:50 PM ---------- Previous post was at 08:38 PM ----------

OEM Unlock may be hidden from the options to prevent accidental bootloader locking, so check the OEM status on the "DOWNLOAD mode". (reboot and hold bixby+vol-down+power buttons).

It should still say "OEM LOCK: OFF"
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
ooops double post.. read next one.. this one was a mistake.
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
I know it is off... I turned it off and went to Download mode to install twrp so I could flash the nemesis rom and CSC selector for ATT.

I want to turn it back on now. I think pokemon go will not work becuase it is off. It has nothing to do with knox. Even if knox is tripped I understand without root samsung pay might not work, but I am hoping since these phones have unlocked bootloaders I can turn off oem unlock and get both working, but I will settle for android pay and pokemon for now.
[Samsung Galaxy Note 8 Questions and Answers] Kamikaze_Ice:
That sounds more like software that needs an enforcing kernel and not permissive.

I know some bank apps are like this, didn't think it would happen to a game. But dont worry, it's only pokemon go so who cares (joking...)
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Since LTE+ works fine on the 950F/D is it safe to say we can try to odin there firmware and try to see if LTE will work with all bands ?
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
You mean Odin flash a N950F firmware on a N950N? Not gonna happen.

---------- Post added at 04:43 PM ---------- Previous post was at 04:24 PM ----------

I'm not looking for anything, I'm asking you to post it so I can point out a few things, including the CA value in ServiceMode.

This is exactly why this all sounds so weird. Most people don't know about it, XDA is full of threads like this one. No offense meant btw.

Yes, that is a very informative thread, the guy has mentioned carrier aggregation as well and I don't see how that's not enough of an explanation.

You can't achieve certain speeds without carrier aggregation which isn't happening on your device.

I'm not sure where I said that, but apologies for confusing you.

My point is, devices can support all the bands used by your network, but if they do not support the combination of those bands, it will only use one band instead of using multiple to achieve a higher throughput.

Suppose the local AT&T tower in your area is broadcasting Bands 4 (1700/2100) and Band 12 (700 MHz), your phone supports both of those bands, however it may or may not support using those bands in a combination, called carrier aggregation where the phone uses two separate bands for uplink and downlink allowing you to have the benefits of Band 4 which would be the primary downlink band, along with having the low frequency advantage of Band 12 which would probably be used for uplink.

So a phone in that case which does not support CA between those two bands will only use one out of either of those two bands, probably the one offering better coverage which would be Band 12, however, as Band 12 provides better coverage (especially indoors), it compromises on throughput when used as is, without CA.

Actually flashing different radios won't magically activate CA, most radio updates just have minor changes with each update, and/or performance improvements. Flashing a different radio won't change anything.
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
FLAME RED... CAN I BUY YOU A BEER or Something for the Help.

I did the final thing you said today and it worked.

I called 611 and got a tech support agent. I gave them the IMEI of my wife's Galaxy S8+ which i bought direct from at&t.

Like you said they don't care if you Double the same IEMI for 2 different lines and you were right!!!

I turned off the phone and turned it back on and the whole icon setup changed uptop. 4G lte. . Did a speed test with 1 bar vs my wife's S8+ and my Note 4 and all 3 were consistent!!

I have to say I am super happy about this. I wonder if this is all I needed to do without flashing roms and stuff.....

I also wonder if I pop the sim into another Note 8 (I have a US version from samsung unlocked) it will be good to go out of the box.?

Now my only issue is getting the OEM unlock - relocked. The option is gone since I flashed the nemesis rom and att CSC. I can't play pokemon go or use samsung pay, which I really did want to use.

But I can say with certainty.. THIS WORKS.

I went to at&t today to get my note 4 which is what I was using before I upgraded to the note 8. I had a Smartwatch with an E-SIM with it's own stand alone number. I got a sim card for that number and turned off the watch so my note 4 is now the number the watch was. SO I have my Note 8 and my Note 4 working (2 different at&t numbers). While I was there I did a *#06# and snapped a shot of the IMEI on the display of at&t - I figured the display phone IMEI was an official at&t phone so if I called at&t 611 and gave them that IMEI for my phone number it would enable Video calling and LTE for my phone, but when I read that you can DOUBLE USE a IMEI of another VOLTE 4G LTE Advanced features phone - I knew my wife's S8+ would be the better way to go so I did that first, but I still have the display phones IMEI should I ever need it.

Thanks again...

ALmost done with all my issues. If I can figure out how to get samsung pay to work I am all set.

DAMMMM!!!! Spoke too soon.. While I had WIFI calling and VIDEO calling working before I called today.. the 4G lte was not right.. which is why I called and did what was suggested. BUt not VIdeo and WIfi calling is giving me an error.... Not working anymore since I called and changed IMEI numbers.

EDIT 2: Called back.. The IMEI of my wifes phone did not go through and reverted back to whatever they had.

SO I gave them my wifes IMEI again. And WIFI calling and Video calling working again. The VOLTE Logo came back and the 4G logo is still there.. I hope it did not screw up my LTE this time.

I guess I am gonna have to live with it or return / sell this 256GB Note 8 and buy a 64GB one.. WHich I really do not want to do.
[Samsung Galaxy Note 8 Questions and Answers] LostinCanada:
Interesting discussion about carrier aggregation - [MENTION=5063250]murtaza02[/MENTION] is there a way to know which models support this? I am waiting (and waiting and waiting and waiting) for the N-950FD (duos, exynos, 256GB internal, orchid grey) and will primarily be using it with Bell (Canada) and either T-mobile or AT&T as the second sim (unless travelling outside North America). It would be good to have a better understanding of this issue, particularly if flashing a different radio will not solve the problem. And it's really not a software issue? I would like to make this purchase eyes wide open, so any information you can share with respect to the N-950FD would be greatly appreciated.

Also, I guess in the case if the above phone never shows up, it looks like the N950F/DS could do the job (not sure if it will be available in 256GB) - is this model capable of carrier aggregation?
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
Not entirely sure about what combos are supported on the 950F.

Just FYI, there's no such thing as a N950FD, as Samsung decided to ditch the FD model numbering scheme and switched back to the DS model numbers.

So a 950FD is basically a 950F/DS.

I'm sure it does support CA, however you may have to flash the CSC to get it to work. That will require root so keep that in mind.

Flashing different radios won't change anything either since radio updates don't change supported bands.

Lastly, I wasn't aware that the F variant of the Note 8 comes in a 256GB storage option, you mind linking where you got it from?

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Yeah my phone shows 4g lte after flashing att csc on my n950n but still get slow speeds. Just likecomp1demon I'm in a tuff spot paid 1200$ for this phone and I don't wanna give up my deep blue sea 256gb model either so it's either I wait for a solution or I sell it.Note also tried different band channels in service mode to no avail but I have not called ATT yet to give them another ATT capable LTE Or VOLTE capable IMIE if I do call how do I word it
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
This is what I did / Said.

Called 611 asked the automated system for tech support. Then stated "new phone:"

Got the tech support person.

Said the following.

Hi this is Kris XXX I just picked up a new samsung galaxy S8+ today.

I put my sim in it from my old phone but I am not getting LTE, WIFI calling, and video calling.

After reading online it was suggested that I call 611 and tell a tech support agent the IMEI of my new phone so you could tie the IMEI to my phone number and activate the features that are not working.

OK sir I can help you. Is the phone an at&t branded phone?

YES it is an at&t galaxy S8+

OK what is the IMEI.,...

Gave them the IMEI.... and said........ I am not calling you from that phone since I understand I will need to turn it off and then restart it for the changes to take effect. So I just want to make sure you have the right number. The phone number associated with the sim card I am talking about is XXX XXX XXXX.

The lady said that is correct... One second.

She did her thing and confirmed the IMEI with me a few times. Again asked me if it was an at&t and explained if it is not an at&t phone some features might not work.

I said... yes it is an at&t branded S8+ I just want my advanced features to work LTE, wifi and video calling.

She said is the phone off?

I said yes.

SHe did more stuff... then told me to restart it.

After I did.. I saw an LTE icon and my wifi calling I had to re-enable (set up the 911 address which took 2 mins).

Tried video calling and all seemed good.

Follow that script and you should be golden.
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I am more concerned about LTE speeds did this correct your LTE speed issues?
[Samsung Galaxy Note 8 Questions and Answers] Comp1demon:
I can't be sure..... My home sucks for bars and Lte speeds even my at&t branded Note 4 and my wifes S8+ get crappy LTE speeds in my home. They all seem to be consistently crappy.

I need to test in a location that is better. I do not go out much. But when I do most of the places I got are in the same 2-3 cell tower locations. I was hitting 20MB/s at the mall about 2 miles from my house the other night before I called after just flashing the phone and doing the CSC. But since I called and posted here that I called. I have not gone many places. I need to find a spot far away from home where my wifes S8+ and my note 4 get over 30-40MBs so I can test my note 8. I will have to get back to you. I am kind of a hermit.
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Wow you must live off the grid I'm in a populated city here in South Florida but my average is between 60 to 90 when right now as I speak in my apartment I'm getting 20 to 30 but my average is higher than that when working correctly
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Let me know when you can test it
[Samsung Galaxy Note 8 Questions and Answers] LostinCanada:
Hi [MENTION=5063250]murtaza02[/MENTION], I'm not sure where you're getting your information from that the FD has been discontinued? It is all over ebay

https://www.ebay.com/sch/i.html?_fr...0.Xsamsung+.TRS1&_nkw=Samsung+N950FD&_sacat=0 and others on this forum have indicated the FD is one of the models coming soon in 256 GB.

As well, I have been following the specs here: https://www.techwalls.com/samsung-galaxy-note-8-sm-n950-model-number-differences/ which seem to be getting updated regularly.

Do you have a source for your information?

Re the CSC, that makes sense. Root is one of the reasons I am after Exynos.
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
If you try doing a firmware search query or looking online officially, there's no such thing as an N950FD.

Due to the confusion between the single and dual SIM S8+ which had the FD model numbering system, Samsung decided to market them as N950F/DS.

eBay sellers may not know this and it's very common for them to assume it's called FD when it's actually not.

If you want actual up to date information on all existing model numbers and variants for the Note 8, you can check my list:

https://xdaforums.com/showthread.php?t=3685054

Or this

http://pdadb.net/index.php?m=device&s=query&d=detailed_specs&codename=Samsung_Baikal

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I just don't get it guys it's 1:24am here EST and I reran speed test and I'm hitting this. This is normally what I get using LTE In the day time ... when it worked correctly if it could only stay this way

Walked 7 feet away to the bathroom to take a piss and got 90+ 20up wtf is going on here??? lol well at least this makes me feel better
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
Dial *#0011# while you're doing the speedtests or after doing them to see what band you're on.
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
I woke up at 6am to retest and it was piss poor slow again using a program called LTE discovery I found out this data when it was on LTE band 2 last night I got over 90mbs ,at 6 am woke up retest and it was slow as dirt again on band 5 however notice the mhz on the upstream dl and up when it was fast it was at 1885mhz while when it was slow it was at 887mhz hmmm ?????? I tried changing the band forcing it 2 but it would not take it it would simply not give me a connection or it would drop to 3g if I did that in service mode
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
[MENTION=518121]tokoam[/MENTION]

Not surprising at all.

Higher frequency bands (Band 2 in this case) will perform better than lower frequency Bands (Band 5 in your case).

The thing is, your phone is using them as entirely separate bands and not performing CA between them which would get you even better speeds.

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
So we already established that the phone can hit those speeds without any problems.Question becomes how can we fix it is it software ? Or hardware I was more inclined to think software but I dunno maybe there's different firmware we can try on the n950n ?
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
Are you on the 950N or 950F?

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
950N 256gb sea blue
[Samsung Galaxy Note 8 Questions and Answers] MeltdownSpectre:
And you say you tried forcing it to stay on Band 2, do you mind going through the steps you took to do that?

Sent from my SM-N950F
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Yeah all I did is used shortcut master to get access to root service mode #2263 to get to band selection and simply selected band 2 signal immediately disconnected and reconnected the. Was placed back to 3g
[Samsung Galaxy Note 8 Questions and Answers] Limeybastard:
Its been like this even when I owned previous Samsung devices on T Mobile, depending on which LTE band it connected on , my speeds would either be high or low at my home base.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
my usb/antenna circuit board at the bottom of the phone went bad after 4-5 days of use. I noticed that pushing on one of the antenna connectors in a particular direction made the signal jump up from -90 or -130 dBA or so up to -80 dBA (which matches my Note 5's reception in the same area, same band). I'm going to try reflowing it in the oven tonight but might just have to wait for parts to be available on eBay since I don't know of any way to get Samsung Korea to fix it for me, and the warranty is void anyway from flashing TWRP.

If you have abnormally poor signal, my bet is that there were some faulty boards sent out, as I noticed that the 950U version on ifixit's teardown has a newer board revision than what is in my 950N, created a week or so after mine and visibly has some minor component placement changes (may have been to address whatever caused mine to suddenly have problems after less than a week).
[Samsung Galaxy Note 8 Questions and Answers] LostinCanada:
Hi [MENTION=5063250]murtaza02[/MENTION] so that second website you gave shows the N950F/DS in 128GB (and also refers to it as N950FD) in gold. It's the last entry on the bottom. There have been many rumors, that the dual sim exynos will be released soon in 256GB. Are you saying this is not the case? If yes, where are you getting your information from?
[Samsung Galaxy Note 8 Questions and Answers] Limeybastard:
I don't doubt you kalm_traveler but I'm just referring to my case scenario. I've always managed no more that approx 35mb down and 10 up from my home location . It's been like this for me on various devices during the last two years on TMO LTE. However, down town in the city speeds are much more improved.
[Samsung Galaxy Note 8 Questions and Answers] Kalm_Traveler:
For sure, I was addressing that to people who have abnormally low signal on their new Note 8 - I noticed this because when I bought it my at-home LTE download speeds were well over 100mbps, but suddenly dropped to less than 20, sometimes 1-2, and upload tests went from 40-50 mbps down to failing entirely or .01 mbps
[Samsung Galaxy Note 8 Questions and Answers] tokoam:
Well keep us informed when you get the new part if it does in fact improve your speed and signal