Develop Bugs

[Q] Getting my E971 soon, have some questions

First of all sorry for starting this thread. But the amount of information is incredible, so I thought it'll be better to ask from people who already know the stuff.
So here goes:
1 - I would like to install a nexus 4 rom (stock custom, what not). Does it mean I have to replace the bootloader? Because I read like half of the thread (where the conversion is discussed) and there were post saying that it's not a requirement for canadian phones.
2 - If I have to to replace the boot loader will the external sd slot be working? (okay, found out there's no slot)

Lost_prophet said:
First of all sorry for starting this thread. But the amount of information is incredible, so I thought it'll be better to ask from people who already know the stuff.
So here goes:
1 - I would like to install a nexus 4 rom (stock custom, what not). Does it mean I have to replace the bootloader? Because I read like half of the thread (where the conversion is discussed) and there were post saying that it's not a requirement for canadian phones.
2 - If I have to to replace the boot loader will the external sd slot be working? (okay, found out there's no slot)
Click to expand...
Click to collapse
It sounds like you don't have a lot of experience flashing ROMs. My advice to you is to only flash ROMs that are for your specific device. If it requires a "hack" using "LGNPST" to "convert" it to an N4, then you need to stay away from it (i.e., if any of those words show up in the thread: DON'T DO IT). If you really wanted an N4, why didn't you just buy an N4?

So not flash n4 roms. High chance of brick because their parition layout is different. If some one used absolute paths instead of "by-name", then flash a nexus 4 boot.img will ovrerid your rpm parition and it's a instant brick on reboot.

True, I own only two devices, both from Samsung (so flashing them is extremely easy).
Sd slot part was really confusing because LG has 5 models.
I am in Europe and N4s are extremely expensive here (450 euro for 8gb). So this phone was a nature choice.
Well anyways there is no way to convert and still have 32gb, so I'll stick with CM or another custom.
Thanks for your reply.

[Q] Using AT&T 32Gb S4 on T-Mobile?

Since it's uncertain at this point if and when T-Mobile will be getting the 32Gb version of the Galaxy S4, I decided to buy the AT&T variant and use it on T-Mobile. I've had a few concerns (see below), all of which have been addressed except for a couple (highlighted below).
1. SIM unlocking - shouldn't be a problem as far as I can tell.
2. Rooting and Flashing new ROMs - I know that the AT&T S4 has the locked bootloader, does this mean I'll have problems with rooting and flshing new ROMs?
3. Enabling all T-Mobile bands (e.g AWS) - possible per this thread.
4. Enabling WiFi calling - possible if a T-Mobile ROM is installed (at least this was the case with the S3).
5. Installing a T-Mobile ROM (ROM based on 16Gb T-Mobile stock) on a 32Gb Galaxy S4 - Possible? Any problems with partitioning?
I will appreciate any input form the knowledgeable forum participants. Thanks.

re: questions
ferganer said:
Since it's uncertain at this point if and when T-Mobile will be getting the 32Gb version of the Galaxy S4, I decided to buy the AT&T variant and use it on T-Mobile. I've had a few concerns (see below), all of which have been addressed except for a couple (highlighted below).
1. SIM unlocking - shouldn't be a problem as far as I can tell.
2. Rooting and Flashing new ROMs - I know that the AT&T S4 has the locked bootloader, does this mean I'll have problems with rooting and flshing new ROMs?
3. Enabling all T-Mobile bands (e.g AWS) - possible per this thread.
4. Enabling WiFi calling - possible if a T-Mobile ROM is installed (at least this was the case with the S3).
5. Installing a T-Mobile ROM (ROM based on 16Gb T-Mobile stock) on a 32Gb Galaxy S4 - Possible? Any problems with partitioning?
I will appreciate any input form the knowledgeable forum participants. Thanks.
Click to expand...
Click to collapse
You will have no problems rooting and flashing new roms with the AT&T S4.
The 32GB MicroSD card works perfectly in ALL the Galaxy S4 varients including the AT&T.
If you purchase your phone from AT&T outright they will Unlock it for you for free.
(there are many other ways to unlock the phone)
Good luck

Misterjunky said:
You will have no problems rooting and flashing new roms with the AT&T S4.
Click to expand...
Click to collapse
Thanks for the quick response. So what does locked bootloader mean?
Misterjunky said:
The 32GB MicroSD card works perfectly in ALL the Galaxy S4 varients including the AT&T.
Click to expand...
Click to collapse
My question was not about the 32Gb SD crad. I was wondering if I can install a T-Mobile ROM on a 32Gb (internal RAM) AT&T S4. Since a T-Mobile stock ROM will most probably come from and will be designed for (partition size-wise?) for 16Gb of internal memory, I was wondering if it will be difficult/possible to install such a ROM on a 32Gb S4 and make use of the larger internal storage.
Thanks again.

AT&T on T-Mobile?
ferganer said:
Thanks for the quick response. So what does locked bootloader mean?
Click to expand...
Click to collapse
Probably should start here with rooting.
And with this recovery you should be able to flash any ROM for the most part that runs the Snapdragon quad-core model (att/canadia-variants, tmo, even the international variant (GT-i9505 only)).
Lastly, if you are needing to utilize the AWS aspect of your phone, you should probably stop off here.
As far as the storage, I've not seen anything regarding seperate ROMs for 16/32/64 GB models, so I don't know why you'd need to worry too much about that.. but I could be wrong.

I'm not all up to date on whether the T-Mobile ROMs are auto-loki'd, but since you're using the AT&T variant, you would have to make certain the ROMs you flash have been made to use djrbliss' bootloader workaround.

re: external sdcard
ferganer said:
Thanks for the quick response. So what does locked bootloader mean?
My question was not about the 32Gb SD crad. I was wondering if I can install a T-Mobile ROM on a 32Gb (internal RAM) AT&T S4. Since a T-Mobile stock ROM will most probably come from and will be designed for (partition size-wise?) for 16Gb of internal memory, I was wondering if it will be difficult/possible to install such a ROM on a 32Gb S4 and make use of the larger internal storage.
Thanks again.
Click to expand...
Click to collapse
Any and all roms which you will be flashing reside in the protected ROOT of the phone,
whether you have NO external sdcard or a 16GB or 64GB external sdcard the actual
rom, radio, kernel, bootloader and all other files required for the rom are all flashed
into that protected ROOT partition of the phone.
So the size of the external sdcard makes no difference at all as far as roms go.
But the bigger it is the more space you will have for your videos, music, pictures,
nandroid backups and, custom roms you will be flashing or anything else which
you might want to keep on the external sdcard.

Misterjunky said:
So the size of the external sdcard makes no difference at all as far as roms go.
Click to expand...
Click to collapse
Thanks, but my concern is INTERNAL not external memory differences.
I hope that the size of the INTERNAL storage also makes no difference at all as far as ROMs go.

ferganer said:
Since it's uncertain at this point if and when T-Mobile will be getting the 32Gb version of the Galaxy S4, I decided to buy the AT&T variant and use it on T-Mobile. I've had a few concerns (see below), all of which have been addressed except for a couple (highlighted below).
1. SIM unlocking - shouldn't be a problem as far as I can tell.
2. Rooting and Flashing new ROMs - I know that the AT&T S4 has the locked bootloader, does this mean I'll have problems with rooting and flshing new ROMs?
3. Enabling all T-Mobile bands (e.g AWS) - possible per this thread.
4. Enabling WiFi calling - possible if a T-Mobile ROM is installed (at least this was the case with the S3).
5. Installing a T-Mobile ROM (ROM based on 16Gb T-Mobile stock) on a 32Gb Galaxy S4 - Possible? Any problems with partitioning?
I will appreciate any input form the knowledgeable forum participants. Thanks.
Click to expand...
Click to collapse
Its your prerogative, but Its just my opinion...I wouldn't have waisted money on anothr carriers model just to have the 32g version so soon.
Even tho att and tmo... have become so compatible on data bands and you can make both sims work on either carriers phone, it still is a downside ... what about legit insurance . Unless you need it or have a 3rd party insurer, I doubt you can ever claim a att phone with t mobile.
Wifi calling is gone for you, unless you catch a rom that' has it incorporated...etc
Sent from my SGH-M919 using xda premium
---------- Post added at 07:28 AM ---------- Previous post was at 07:24 AM ----------
ferganer said:
Thanks for the quick response. So what does locked bootloader mean?
My question was not about the 32Gb SD crad. I was wondering if I can install a T-Mobile ROM on a 32Gb (internal RAM) AT&T S4. Since a T-Mobile stock ROM will most probably come from and will be designed for (partition size-wise?) for 16Gb of internal memory, I was wondering if it will be difficult/possible to install such a ROM on a 32Gb S4 and make use of the larger internal storage.
I can tell you one thing for sure... I flashed a t mobile 4.1.2 tar right onto my brother's att s3 , so wether development is same or up to date with the s4 being so new in that manner i dunno, but I can say for the s3 you can flash t mobile tar files and some roms ,for instance t motion is a tmo based rom that works for att s3b if that helps.
Look into this further
Thanks again.
Click to expand...
Click to collapse
Sent from my SGH-M919 using xda premium

ferganer said:
Since it's uncertain at this point if and when T-Mobile will be getting the 32Gb version of the Galaxy S4, I decided to buy the AT&T variant and use it on T-Mobile. I've had a few concerns (see below), all of which have been addressed except for a couple (highlighted below).
1. SIM unlocking - shouldn't be a problem as far as I can tell.
2. Rooting and Flashing new ROMs - I know that the AT&T S4 has the locked bootloader, does this mean I'll have problems with rooting and flshing new ROMs?
3. Enabling all T-Mobile bands (e.g AWS) - possible per this thread.
4. Enabling WiFi calling - possible if a T-Mobile ROM is installed (at least this was the case with the S3).
5. Installing a T-Mobile ROM (ROM based on 16Gb T-Mobile stock) on a 32Gb Galaxy S4 - Possible? Any problems with partitioning?
I will appreciate any input form the knowledgeable forum participants. Thanks.
Click to expand...
Click to collapse
As someone who has done it
1.) Works fine, performs as expected
2.) Yes.... yes you will... limits you a bit. YOu can't just dump a TMO rom on, you have to make sure to use LOKI_DOKI after flashing (DONT REBOOT) and you can't use ODIN for the flash. (I use complete stock... now I cant #&%)(#*%)
3.) It works 100%, I haven't noticed a single problem. Battery usage is normal unlike the conversion on the GS2 and GS3.
4.) Have to use a TMO rom
5.) Yes possible, you leave the partitioning alone. DO NOT EVER REPARTITION UNLESS YOU WISH DEATH TO THE PHONE.
Note: The PIT prevents the death, there isnt one for the S4 yet...

Haxel said:
As someone who has done it
1.) Works fine, performs as expected
2.) Yes.... yes you will... limits you a bit. YOu can't just dump a TMO rom on, you have to make sure to use LOKI_DOKI after flashing (DONT REBOOT) and you can't use ODIN for the flash. (I use complete stock... now I cant #&%)(#*%)
3.) It works 100%, I haven't noticed a single problem. Battery usage is normal unlike the conversion on the GS2 and GS3.
4.) Have to use a TMO rom
5.) Yes possible, you leave the partitioning alone. DO NOT EVER REPARTITION UNLESS YOU WISH DEATH TO THE PHONE.
Note: The PIT prevents the death, there isnt one for the S4 yet...
Click to expand...
Click to collapse
Thanks a lot for the answers. I got everything except for "now I cant #&%)(#*%)".

Tethering
ferganer said:
Thanks a lot for the answers. I got everything except for "now I cant #&%)(#*%)".
Click to expand...
Click to collapse
I have the AWS booted and it works great.
What do I have to do to get tethering (ATT 32gb now on tmobile)?

Question Concerning LG G4

Hey guy, sorry if this is going to be a bit of a noob question but please try and bear with me. In lieu of the recent nexus 5x which i found to be a huge disappointment I decided to pick myself up an lg g4. I'm not the biggest fan of the stock lg Rom and immediately looked for Cyanaogenmod.
I know that no stable build has yet been release for this phone yet and that i just need to have some patience, but I have some questions regardless. I'm wondering if there is a difference between root and an install of cyanogenmod. By this i mean that there are certain installer which will complete the process for you without you having to do any rooting yourself. If i understand correctly the phone is still being rooted but just by a program. My question is, is it only this latter feature that is not yet available for my phone. Like, if I were to root it myself would I then be able to install a cyanogenmod ROM. Or is it that there is not yet any compatible ROM for my device. If it is of any help I have the LG-H812 version of the phone.
Also, I recently saw a video on the XDA developers YouTube channel where it was discussed how TWRP is now available for the G4. what exactly does this mean and is it something that I would want.
Thank you very much for putting up with me.

Sounds like you need to do a bit more research before you do anything. I don't think TWRP is available for your model at the moment, which rules out custom roms/cyanogenmod. You just have to be patient and hope TWRP becomes available, then wait for a stable rom to come along. Or trade/sell your H812 for the international H815 (careful there are a few variants of the H815).

Nickvek9 said:
Hey guy, sorry if this is going to be a bit of a noob question but please try and bear with me. In lieu of the recent nexus 5x which i found to be a huge disappointment I decided to pick myself up an lg g4. I'm not the biggest fan of the stock lg Rom and immediately looked for Cyanaogenmod.
I know that no stable build has yet been release for this phone yet and that i just need to have some patience, but I have some questions regardless. I'm wondering if there is a difference between root and an install of cyanogenmod. By this i mean that there are certain installer which will complete the process for you without you having to do any rooting yourself. If i understand correctly the phone is still being rooted but just by a program. My question is, is it only this latter feature that is not yet available for my phone. Like, if I were to root it myself would I then be able to install a cyanogenmod ROM. Or is it that there is not yet any compatible ROM for my device. If it is of any help I have the LG-H812 version of the phone.
Also, I recently saw a video on the XDA developers YouTube channel where it was discussed how TWRP is now available for the G4. what exactly does this mean and is it something that I would want.
Thank you very much for putting up with me.
Click to expand...
Click to collapse
He's right man you Really should start hammering google especially with a more technically involved root with our g4s. No matter what anyone tells you TWRP or another custom recovery is the number one absolute most important thing to do with any root and immediately after you root before you make any modifications beyond normal app installs whatsoever. Custom recovery is what is going to save your ass in a bootloop or brick situation where you cannot get to the OS or even get a response from the device. As long as you have a backup in storage, you can use hardware key combos to enter TWRP and wipe the system and the problem and reflash the backup. Recovery is completely separate from the Rom that's how you can get around a total Rom disaster when nothing else works. The main reason there's no Roms for them yet is cuz only that one variant's bootloader can be unlocked which is required in most devices to flash a Rom or recovery and the reason that even with my capabilities I won't even bother rooting my expensive ass main important phone I'm still paying for every month lol I just fulfill my flash addiction on an l70 on a daily basis and daily I get outta bootloop and bricks thanks to TWRP... The g3 is perfect for playing with and I'm considering buying a used one and o I recommend the same until the g4 is fully cracked......also CM only comes pretty rooted because it does the same thing as normal just by flashing supersu which is a breeze with TWRP also
Through my ancient eyes comes the certainty of decay... LG G4 & L 70

Vodafone logo on start up

Hi guys
Can this be removed without root please? i was hoping like my Samsung that when i flashed to stock generic firmware it would remove this but it hasn't!!

Wait you mean the boot animation? Is the logo you're talking about come up during boot?
Sent from my VS986 using Tapatalk

dadrumgod said:
Wait you mean the boot animation? Is the logo you're talking about come up during boot?
Sent from my VS986 using Tapatalk
Click to expand...
Click to collapse
Sorry yes the vodafone rubbish

Oh yea unfortunately that's the boot animation and that requires r/w access to the system which requires root for sure and on these g4's that write protection is intense man. You would do best finding a rooted system.img someone already rooted if that's the rout you go lol
Sent from my VK700 using Tapatalk

dadrumgod said:
Oh yea unfortunately that's the boot animation and that requires r/w access to the system which requires root for sure and on these g4's that write protection is intense man. You would do best finding a rooted system.img someone already rooted if that's the rout you go lol
Click to expand...
Click to collapse
true to some extent. but you have got the wrong message as i'm sure the OP was on about flashing non branded firmware.
i'm going to go guess that the OP has purchased a Vodafone G4 which has been on sale for £225 in the UK.
i wish i could get my hands on one!
the G4 we talk about here is the H815
now from what i tried, when i flash the non branded firmware, i get an annoying pop up about wrong customer ID.
i didn't flash it to MM for this reason as i just didn't want to risk it in case i lose the ability to downgrade.
it is to do with the CUST parition.
some users on forums have said MM update gets rid of the bootanimation and goes to the standard LG one.
Maybe someone who has tried it can provide feedback

El_Nino9 said:
true to some extent. but you have got the wrong message as i'm sure the OP was on about flashing non branded firmware.
i'm going to go guess that the OP has purchased a Vodafone G4 which has been on sale for £225 in the UK.
i wish i could get my hands on one!
the G4 we talk about here is the H815
now from what i tried, when i flash the non branded firmware, i get an annoying pop up about wrong customer ID.
i didn't flash it to MM for this reason as i just didn't want to risk it in case i lose the ability to downgrade.
it is to do with the CUST parition.
some users on forums have said MM update gets rid of the bootanimation and goes to the standard LG one.
Maybe someone who has tried it can provide feedback
Click to expand...
Click to collapse
Lol exactly m8, having been a previous Samsung owner for the last 4 phones i have found it really simple to apply the FW and get rid of the branded stuff that is found on them with the simple stock manufacturers latest generic FW. This phone however sounds like a bit of a ball bag to do. I have used the LGUP to get the 20D on it + bonus of the MM that appeared on it at the same time :good: i wasnt really bothered with that to be honest happy on LP, no idea why people are going so mad on these to be truthful. I think the screen on this is very average and the viewing angles are terrible , you have to have the screen on full 100% to be usable IMO, i got it to try as it was cheap but i don't understand the hype. I have come from my S5 sammy and its still fine i just wanted a bigger screen really, and my first choice the Moto X style is too much at the moment. BUT i still want to get rid of this Voda rubbish really annoys me lol. I take it i could root then unroot to get rid of it???

phooeyman said:
BUT i still want to get rid of this Voda rubbish really annoys me lol. I take it i could root then unroot to get rid of it???
Click to expand...
Click to collapse
could come and bite you when you OTA.
how did you update using LGUP to MM? i mean was it a clean install using the refurb tickbox or just a write over?
i ask, as if you are to downgrade to LP and then use open euro LP, then you get an annoying pop up about cust value not correct or something (search LG G3 as it popped up there first) then flash MM.
i haven't found any solid info regarding debranding.
why does a 10 second boot animation bug you?

Easy folks, I spose I know what he´s talking about.
What you need is root, you do, no way around.
You then go to /cust/vdf_com and delete the folder "poweron". Now restart.
That´s it, you are welcome .

Why does it come up with the wrong cust number when flash another firmware? I don't it and it takes away the Vodafone start up. But it installed so much apps, so many Vodafone apps and a lot of foreign apps. Why does it do these things with unbranded firmware?

Root will remove your ability to take ota updates but as long as you have a kdz you can flash it to the state it came outta the box in, but idk if your variant has one. Just be careful I see more people brick trying to change a boot animation than some serious stuff, weird huh lol
Sent from my VK700 using Tapatalk

It's no total biggy.. I just found it odd that a total wipe to generic firmware did not sort this like on the Samsung's. It got rid of the Vodafone apps. Like I have said if it's easy to do via root with a app etc it might be worth doing, and then just unroot. Looks like these LG phones are a bit of a pain as the Samsungs seem a lot simpler and the scene if bigger

Rooting Quetion

I just purchased a Galaxy Note 4 in mint condition, because I'm not happy with my S 7 Edge, so this will be my daily driver, a I can't stand not having a rootable phone.. Ya this is a few yrs old, but it seems like it still has roms available.. I had a Verizon Note 4 and used the international roms, and still have them... Was there any issue with rooting after it went to 6.0 Marshmellow? I believe this phone will come shipped with it..

No issues I've ever heard of. Just flash twrp with Odin. Then flash supersu. Assuming from your post count you need no help with that.
And of course, if you use international rom, you might need a data fix for your service.

aaron74 said:
No issues I've ever heard of. Just flash twrp with Odin. Then flash supersu. Assuming from your post count you need no help with that.
And of course, if you use international rom, you might need a data fix for your service.
Click to expand...
Click to collapse
Thanks, Ya I know how to root, but like anything else, I like to check from time to time, when dealing with another phone I have not had.. Ya I had a Verizon Note 4, but that was a pure pain in the aers.. LOL. IfI would have checked before buying the S 7 Edge, I would not have spent the money... Ya I still have some files for the international rom Dr. Keaton, I used for the Verizon Note 4 and also still have the data fix.. But I'm thinking of trying one of the many roms just for Sprint. Thanks looking forward to getting this phone in my hands around the 31 of this month..

doubledragon5 said:
Thanks, Ya I know how to root, but like anything else, I like to check from time to time, when dealing with another phone I have not had.. Ya I had a Verizon Note 4, but that was a pure pain in the aers.. LOL. IfI would have checked before buying the S 7 Edge, I would not have spent the money... Ya I still have some files for the international rom Dr. Keaton, I used for the Verizon Note 4 and also still have the data fix.. But I'm thinking of trying one of the many roms just for Sprint. Thanks looking forward to getting this phone in my hands around the 31 of this month..
Click to expand...
Click to collapse
Yup and there's a unified AOSP Nougat ROM available that is for our device and it runs great!

doubledragon5 said:
Thanks, Ya I know how to root, but like anything else, I like to check from time to time, when dealing with another phone I have not had.. Ya I had a Verizon Note 4, but that was a pure pain in the aers.. LOL. IfI would have checked before buying the S 7 Edge, I would not have spent the money... Ya I still have some files for the international rom Dr. Keaton, I used for the Verizon Note 4 and also still have the data fix.. But I'm thinking of trying one of the many roms just for Sprint. Thanks looking forward to getting this phone in my hands around the 31 of this month..
Click to expand...
Click to collapse
Supposedly sometime before Christmas, which should be very soon, a lot of people are anticipating the arrival of @tx_dbs_tx N7 port rom. He's suppose to release it soon. He only releases very stable roms. Im sure it'll be very great.
But until then, if you like high customizable rom, you should try Dtux rom here on sprint thread. And if you like aosp, we have cm14 working pretty damn good and stable. It's on the verizon thread but works for all.
Enjoy your new old note 4, still the best phone money can buy.

aaron74 said:
Supposedly sometime before Christmas, which should be very soon, a lot of people are anticipating the arrival of @tx_dbs_tx N7 port rom. He's suppose to release it soon. He only releases very stable roms. Im sure it'll be very great.
But until then, if you like high customizable rom, you should try Dtux rom here on sprint thread. And if you like aosp, we have cm14 working pretty damn good and stable. It's on the verizon thread but works for all.
Enjoy your new old note 4, still the best phone money can buy.
Click to expand...
Click to collapse
I just downloaded that rom you mentioned. So when my phone gets here, I can get started.. One question. Should I root, before I activate it or activate first.

doubledragon5 said:
I just downloaded that rom you mentioned. So when my phone gets here, I can get started.. One question. Should I root, before I activate it or activate first.
Click to expand...
Click to collapse
I don't use sprint service, but I would definitely setup and activate phone on pure stock, make sure everything works.
Then once you install twrp, I'd also make a complete stock backup (at least boot,system,efs,modem). Or use something like Flashfire by chainfire to backup partitions. Especially all the EFS partition. Keep it somewhere for safe keeping.
I don't know what kind of modding your going to do, but having a working backup is very helpful.
Then you can do what you want. But yes activate on pure stock, cause that's gonna setup your efs partition correctly and other stuff. Plus some custom roms don't have the Sprint activation software in them.

Finally got my Note 4 it is activated, but need a new sim, because the one Best buy sold me is not compatible. Now my question this one comes with 5.1.1 N910PVPU4C0G5. Is the root method for this the same as arron answered in post 2. Just checking..
I do not see a TWRP for the Note 4 other than the edge, what is the deal.

doubledragon5 said:
Finally got my Note 4 it is activated, but need a new sim, because the one Best buy sold me is not compatible. Now my question this one comes with 5.1.1 N910PVPU4C0G5. Is the root method for this the same as arron answered in post 2. Just checking..
I do not see a TWRP for the Note 4 other than the edge, what is the deal.
Click to expand...
Click to collapse
If you follow the Note 4 Qualcomm path: trlte, you'll find the one for Sprint Note 4.
https://dl.twrp.me/trltespr/twrp-3.0.2-0-trltespr.img.tar
The one above is for Odin flashing in download mode. Use the AP slot but uncheck auto reboot in Odin options. You'll need to wait for your success, 0 fail then pull USB and battery and wait at least 30 seconds. If your initial boot after TWRP flash isn't recovery, you'll end up with stock recovery when you boot there later. It won't stick.
Keep in mind that root methods are same for both lollipop and marshmallow but updating will remove root in most cases, especially using suggested methods. With that in mind, get to the right update before you root. If you're flashing a custom ROM, you don't have to root first; custom ROMs include root.
As already mentioned, make your appropriate backups.
Sent from my SM-N910P using Tapatalk

Ok finally got root. Now to debloat this stock rom or install another..