Database Users

[Q] [Newbie Question] Details about rooting

Hello all, and please help me with some small details before rooting.
I have an LG G2 with stock KITKAT 4.4.2., baseband M8974A-1.0.190084,kernel 3.4.0., build D80220b, software D80220b-219-02.
My questions
- do I need to upgrade stock firmware to D802d or D802f before rooting, and if yes wich is more stable
- is a SIM card needed (as inserted in the phone) for rooting process
- do I need to unlock the phone before rooting since it is locked with my local carrier (TELE 2 HR)
- does a custom ROM automaticly eliminate OTA upgrade and so prevent from bricking, or it must be unchecked manualy
- when installing a custom ROM (probably Cludy G3) do I need to flash a new custom kernel or it doesent mater (probably Bruce if it is compatibile)
- how does one check for compatibility ROM - kernel, is it just simple as finding "stock ROM" - "stock kernel" in the title
- do I need to instal a new KK baseband before custom ROM since I am allready on KITKAT
- do I need to do any kind of factory reset and/or wipe before rooting or later instaling a custom ROM
Thank you very much in advance, I have been searching all over for this simple answers but couldnt find any,
Sorry if the questions are too noobish but I am afraid tostart anything before I find the answers

tomarin said:
Hello all, and please help me with some small details before rooting.
I have an LG G2 with stock KITKAT 4.4.2., baseband M8974A-1.0.190084,kernel 3.4.0., build D80220b, software D80220b-219-02.
My questions
- do I need to upgrade stock firmware to D802d or D802f before rooting, and if yes wich is more stable
- is a SIM card needed (as inserted in the phone) for rooting process
- do I need to unlock the phone before rooting since it is locked with my local carrier (TELE 2 HR)
- does a custom ROM automaticly eliminate OTA upgrade and so prevent from bricking, or it must be unchecked manualy
- when installing a custom ROM (probably Cludy G3) do I need to flash a new custom kernel or it doesent mater (probably Bruce if it is compatibile)
- how does one check for compatibility ROM - kernel, is it just simple as finding "stock ROM" - "stock kernel" in the title
- do I need to instal a new KK baseband before custom ROM since I am allready on KITKAT
- do I need to do any kind of factory reset and/or wipe before rooting or later instaling a custom ROM
Thank you very much in advance, I have been searching all over for this simple answers but couldnt find any,
Sorry if the questions are too noobish but I am afraid tostart anything before I find the answers
Click to expand...
Click to collapse
1. You don't have to upgrade because you can use rooter that is compatible with your current firmware build, the differences between the firmware are only on their features, with less case of minor problem solved from previous build.
2. No, you don't need to put your SIM on.
3. Custom ROMs are meant to give you better performance of the current build, especially if it is Stock Based Custom ROM. Why you shouldn't update via OTA? because with several changes in the custom ROM, Official build will find it different from its official release, which would cause errors that could ended up with bootloop, even worse.. Hopefully, several developers also have their own OTA feature so people can easily get the update.
4. It doesn't matter since Custom ROMs sometimes come with their own suggested kernel that fit with the ROM. But you can also try other kernels if it suits you.
5. Yes, it is quite that simple, but also try to find out whether it is compatible or not with the ROM.
6. No, if you already on KitKat, you don't need to flash KK baseband.
7. Only when you are about to flashing new ROM..

Rei Zazie said:
1. You don't have to upgrade because you can use rooter that is compatible with your current firmware build, the differences between the firmware are only on their features, with less case of minor problem solved from previous build.
2. No, you don't need to put your SIM on.
3. Custom ROMs are meant to give you better performance of the current build, especially if it is Stock Based Custom ROM. Why you shouldn't update via OTA? because with several changes in the custom ROM, Official build will find it different from its official release, which would cause errors that could ended up with bootloop, even worse.. Hopefully, several developers also have their own OTA feature so people can easily get the update.
4. It doesn't matter since Custom ROMs sometimes come with their own suggested kernel that fit with the ROM. But you can also try other kernels if it suits you.
5. Yes, it is quite that simple, but also try to find out whether it is compatible or not with the ROM.
6. No, if you already on KitKat, you don't need to flash KK baseband.
7. Only when you are about to flashing new ROM..
Click to expand...
Click to collapse
Thank you very much for your detailed answers !! :good::good:

How to know your Build No on Custom Rom?

Hay there! I just installed Costom Rom on my Galaxy S5 G900I after a great stuggle at one stage i thought I bricked my phone, but lucky this time. All thing is fine even great with custom rom the issue it that, It change my device information and it is Note 5 Now here is my questions?
1) How to know my Build No ( orginal one before custom rom)
2) If I want to installed another Rom then how to find my phone match's Rom?
Thanks and Sorry, If i wasn't clear enough.

Jabbarshah said:
1) How to know my Build No ( orginal one before custom rom)
Click to expand...
Click to collapse
Hi Jabbarshah
If you followed xda tutorials by the letter, you have made a complete Nandroid backup before starting any modifications.
Just in case the information you eagerly need isn't present, you may restore that backup and regain access to it.
What lasted after ROM installation can be easily visualized using Phone INFO ★Samsung★. Specially Hardware and Personal tabs are stock information.
Jabbarshah said:
2) If I want to installed another Rom then how to find my phone match's Rom?
Click to expand...
Click to collapse
Your main information while seeking for a new ROM is the model SM-G900I. Nothing else matters.
You will just need to take care, for future flashes, that your bootloader and modem are matching (closer enough) the firmware you are flashing.
Example:
a) If you intend to flash PopWiz Telstra v5.1 that is compatible with your G900I, would be kinda complex as @iris28 doesn't clearly states which firmware version he's using. The information may be somewhere onto his thread but unfortunately isn't advertised as should.
b) THE GALAXY PROJECT by Master @djb77 states clearly that he's using Lollipop XXS1BPD3. :victory: ... so you end opting for it.
Now you just have to search for the closer firmware you can find that will match (not exactly) TGP. You have a complete list at Sammobile SM-G900I. Seek for your country/provider with higher Lollipop (5.0) release. If you are unable to find a flashable Odin file for that, you may do it yourself (xda way)
Hope I could be clear enough.
Have fun.
.

A total newbie flasher needs help

Hi.. I'm in way over my head trying to install a more debloated Rom than the original stock. Unfortunately I didn't succeed very well.
I tried two different ROMS and both of them turned the Sim off and on every second or so. Lots of *pling* noises followed by a message that the Sim card was or wasn't present. It changed so much back and forth that I didn't even get a chance to enter the pin. I belive it is because of some combabillity issues between the rom and baseband/radio version
This lead me to the question: How do I know what rom and baseband would be the most suited for me? I'm living in Denmark (nordic country), but I simply can't figure what rom that is compatible with what baseband.

Boot into Odin mode and verify the model number. Then go to Sammobile.com, download a rom for your country,and install it with Odin.
Did you buy the phone in the country where it is being used?

came99 said:
Hi.. I'm in way over my head trying to install a more debloated Rom than the original stock. Unfortunately I didn't succeed very well.
I tried two different ROMS and both of them turned the Sim off and on every second or so. Lots of *pling* noises followed by a message that the Sim card was or wasn't present. It changed so much back and forth that I didn't even get a chance to enter the pin. I belive it is because of some combabillity issues between the rom and baseband/radio version
This lead me to the question: How do I know what rom and baseband would be the most suited for me? I'm living in Denmark (nordic country), but I simply can't figure what rom that is compatible with what baseband.
Click to expand...
Click to collapse
I noticed you'd posted a duplicate thread, I'm guessing it was by accident but I've removed it for you
Regards
Sawdoctor

Sorry if what I'm asking is obvious, but when I install a custom rom, I also need to make sure I install a compatible radio for my area, right?
Sammobile is only stock ROMS, right? And I'm trying to debloat her phone. So when installing a custom rom from this forum and either the reception is bad, it doesn't register Sim card properly or the like.. It might be because I need another baseband than the one that came with the rom right? And what do I need to look for in that regard?
Sorry, but I find it pretty complicated.

I recommend flashing a completely stock ROM, set it up, and make sure everything is working properly. If it doesn't work properly on a stock ROM, it is unlikely it will work properly on a custom ROM.
I find it best to run the latest bootloader and modem regardless of which ROM will be used with the phone.
Problems can sometimes occur when flashing current ROMs over old bootloaders and modems.

audit13 said:
I recommend flashing a completely stock ROM, set it up, and make sure everything is working properly. If it doesn't work properly on a stock ROM, it is unlikely it will work properly on a custom ROM.
I find it best to run the latest bootloader and modem regardless of which ROM will be used with the phone.
Problems can sometimes occur when flashing current ROMs over old bootloaders and modems.
Click to expand...
Click to collapse
Thank you for the already helpful reply.
The thing you say about always flashing newest modem regardless of rom, is very helpful. I didnt even know you could do that. But my problem persist:
I already flashed back to stock, and it runs fine. SO far so good. The problem is that out of 16 GB, the bloatware is justing taking up to much space. But the last two rom I tried both had problems recognising the SIM card (toggled present/not present all the time).
Thats not the case on stock.. So how do I find the proper modem for my phone to use with a custom rom?
I keep seeing a link to sammobile, but all I can find is the bloated stock rom (or I dont know what to look for). Can I grab just the modem somewhere?
When installing a custom rom, it changes the current modem right? AFAIK I have to flash the proper modem afterwards, right?
And therein lies my problem: I dont know how to find the most suited one for my country (which is denmark). And the one that comes with the roms seems to be the wrong ones.
PS: A follow up question: Kernel and baseband/radio/modem is not the same, right? The kernel is not region specific, as the baseband/radio/modem, right?

came99 said:
Thank you for the already helpful reply.
The thing you say about always flashing newest modem regardless of rom, is very helpful. I didnt even know you could do that. But my problem persist:
I already flashed back to stock, and it runs fine. SO far so good. The problem is that out of 16 GB, the bloatware is justing taking up to much space. But the last two rom I tried both had problems recognising the SIM card (toggled present/not present all the time).
Thats not the case on stock.. So how do I find the proper modem for my phone to use with a custom rom?
I keep seeing a link to sammobile, but all I can find is the bloated stock rom (or I dont know what to look for). Can I grab just the modem somewhere?
When installing a custom rom, it changes the current modem right? AFAIK I have to flash the proper modem afterwards, right?
And therein lies my problem: I dont know how to find the most suited one for my country (which is denmark). And the one that comes with the roms seems to be the wrong ones.
PS: A follow up question: Kernel and baseband/radio/modem is not the same, right? The kernel is not region specific, as the baseband/radio/modem, right?
Click to expand...
Click to collapse
Custom ROMs can't change your modem, they can't write to those partitions.
In other words, your modem will be the same no matter what. The only way to change it is to flash the appropriate modem files or an actual stock ROM.

SO with the stock rom working now, the modem/rom combination would not be the culprit if something doesnt work afterwards?
What could have been the issue with the sim card connecting and disconnecting every second on the other rom I tried? (Iperium/Imperial something)

came99 said:
SO with the stock rom working now, the modem/rom combination would not be the culprit if something doesnt work afterwards?
What could have been the issue with the sim card connecting and disconnecting every second on the other rom I tried? (Iperium/Imperial something)
Click to expand...
Click to collapse
What I said is that a custom ROM can't change your modem. But that doesn't mean it can't be affected by your modem.
You may want to read Imperium ROM's install instructions very carefully, cuz I'm pretty sure you missed something important.

Doh.. You might be right.. Ill try flashing the tar files in Odin.
But I just recently got my phone to behave when connecting on Odin.. It also connected back and forth all the time. Putting a USB hub in the middle solved it though (and made it possible to revert to stock). Any idea wht that was about? I reckon either some driver or USB power problem? But Im really fumbling understanding it all, and when it acts up at the same time, even the most simple problems can be hard to see through (because there is always the uncertainty that I misunderstood something basic)..
Just having this conversation helped me understand a lot better how the ROMs and modem is connected (or more precise: How they are not).
And I actually may have had the right baseband all along (Nordic Countries). I will know when I tried flashing the rom again.
Thank you very much

It doesn't matter where you are from, the phone should work with any baseband in any country.
The thing is that some ROMs (like Imperium here) may require a different modem to function properly. In this case, it may require the PG1 modem (listed in the Imperium thread) to solve your problems.

Before flashing a stock ROM, confirm the model # in download mode.
If you want a debloated stock ROM, you could flash a stock ROM, flash TWRP recopvery, flash supersu for root, and use Titanium Backup to freeze or uninstall apps.

So right now I tried flashing the Resurrection Remix ROM, but it wont make any calls (a voice just says that the number cant be reached, even though I know the numbers exist). What could be the case there?

The modem and bootloader may be too old.

can it also be to new?
I have consulted the below site several times, but the link is dead to the page where I can look up what modem to use.
Can someone please point me in the right direction of which to use?

This site: http://forum.xda-developers.com/showthread.php?t=2192025
What modem should I choose for my phone? Living in Denamrk and trying with the ressurection remix rom? I tried 3 different of the modems starting with XX but all have the same problem: I cant make any calls. It just says that "there isnt any members on the selected number".
Making calls works fine on stock rom

came99 said:
This site: http://forum.xda-developers.com/showthread.php?t=2192025
What modem should I choose for my phone? Living in Denamrk and trying with the ressurection remix rom? I tried 3 different of the modems starting with XX but all have the same problem: I cant make any calls. It just says that "there isnt any members on the selected number".
Making calls works fine on stock rom
Click to expand...
Click to collapse
The ones linked in the Imperium ROM thread are the newest.
And no, it can't be too new.
It's probably something related to your phone model not being fully supported by the ROM.
JDCTeam ROMs should work, because they support a wide range of S4 models.

I got stock rom to work (again again)
And now I managed to flash the JDC Team you recommended and still having the baseband from the stock rom (Which were able to make calls)
But whatyaknow.. I STILL cant make outgoing calls on the custom roms! What in the world can be the problem? I spent the whole day on this.

.. I should be able to make outgoing calls without flashing Gapps, right?

Yes, you should be able to make calls without gapps.
You flashed the latest stock rom and confirmed everything works?
You confirmed the model number in download mode?

NEED Custom ROM for xt902 [AKA 201M softbank]

NEED Custom ROM for xt902 [AKA 201M softbank]
boot-loader is unlocked and temporary root is achieved but there are no custom Roms available for this device please anyone have a custom ROM or this device please post
used this method to root
https://forum.xda-developers.com/showthread.php?t=2194770&page=2
also tried this method to jump to kitkat but failed [stucked on motorola logo after flashing via RSD lite]
https://forum.xda-developers.com/droid-razr-m/general/guide-kitkat-201m-t3185885

thugs.lif3 said:
NEED Custom ROM for xt902 [AKA 201M softbank]
boot-loader is unlocked and temporary root is achieved but there are no custom Roms available for this device please anyone have a custom ROM or this device please post
Click to expand...
Click to collapse
Do you have a custom recovery to enable you to flash a custom ROM?
I did a quick search on www.github.com and did not find any device specific trees; for an "xt902". Its from a device specific tree that a custom ROM is combined with to build a ROM from source (and the custom recovery). github is normally the place most devs will put code, so that result does not look good for finding a custom ROM.
Can you flash another device? For example, I have an xt905 but flash xt907 ROM's as the difference is in the radio which is not part of the ROM but the firmware. I also remember that at one stage moto's devices where unified so that all msm8960 based phones could flash the same ROM zip.
But all this is useless if you cant find a custom recovery. Or build one from source... but again, you will need a device tree to do all of this.
There are also some "porting" ROM instructions here on XDA. Haven't done it myself, but others appear to have had success. But I also think that was switching from one custom ROM to another. eg https://forum.xda-developers.com/ch...ide-how-to-port-lollipop-marshmallow-t3283452 though you may have some luck porting from an xt907 (ie RAZR M)
good luck.

DiamondJohn said:
Do you have a custom recovery to enable you to flash a custom ROM?
I did a quick search on www.github.com and did not find any device specific trees; for an "xt902". Its from a device specific tree that a custom ROM is combined with to build a ROM from source (and the custom recovery). github is normally the place most devs will put code, so that result does not look good for finding a custom ROM.
Can you flash another device? For example, I have an xt905 but flash xt907 ROM's as the difference is in the radio which is not part of the ROM but the firmware. I also remember that at one stage moto's devices where unified so that all msm8960 based phones could flash the same ROM zip.
But all this is useless if you cant find a custom recovery. Or build one from source... but again, you will need a device tree to do all of this.
There are also some "porting" ROM instructions here on XDA. Haven't done it myself, but others appear to have had success. But I also think that was switching from one custom ROM to another. eg https://forum.xda-developers.com/ch...ide-how-to-port-lollipop-marshmallow-t3283452 though you may have some luck porting from an xt907 (ie RAZR M)
good luck.
Click to expand...
Click to collapse
treid porting end up in cwm error [status 7] i have managed to installed an australian variant official kitkat 4.4 in the mobile using rsdlite but the mobile is giving me "no service" error and yes i had a cwm on a stock jeallybean 201m with temp root

actually, out of interest I searched for your device, and it appears to simply be a Japan variant of an xt907 just as my xt905 is an Australian variant of the xt907. ie same device with different radio bands/frequencies
Have you tried installing TWRP for an xt907? thats what I have (and build) for my xt905. Assuming you are on JBBL, try ==> https://forum.xda-developers.com/droid-razr-m/general/twrp-3-1-1-xt907jbbl-t3652141 (nb: flash in bootloader mode)
For further instructions, see the "custom recovery" section of the first post at ==>https://forum.xda-developers.com/droid-razr-m/general/guide-faq-how-to-root-boot-unlock-t2869432

I have ROMs in my new thread for the XT907. It's about the only available ROMs I could find that work. ROMs for this device were removed from CM site when Lineage took over. There are no tutorials though. If you are unlocked and on KitKat, you need to downgrade to Jellybean. There is a link in my thread at the bottom that tells you how to downgrade. All the files are available on my Google Drive. Just make sure you follow the instructions to the T.
I can walk you through if you need help. Once you do one, it's easy to do the rest.

thugs.lif3 said:
treid porting end up in cwm error [status 7] i have managed to installed an australian variant official kitkat 4.4 in the mobile using rsdlite but the mobile is giving me "no service" error and yes i had a cwm on a stock jeallybean 201m with temp root
Click to expand...
Click to collapse
DragonFire1024 said:
I have ROMs in my new thread for the XT907. It's about the only available ROMs I could find that work. ROMs for this device were removed from CM site when Lineage took over. There are no tutorials though. If you are unlocked and on KitKat, you need to downgrade to Jellybean. There is a link in my thread at the bottom that tells you how to downgrade. All the files are available on my Google Drive. Just make sure you follow the instructions to the T.
I can walk you through if you need help. Once you do one, it's easy to do the rest.
Click to expand...
Click to collapse
Do NOT use any full firmware from any other phone than the one specifically made for your phone! you will lose your modem/signal at the very least (as you have). ie Do not use an xt907 as suggested above, or an xt905's firmware or you will lose your signal (as I think you have)
To get your signal back, reflash / RSDLite your original firmware. This step should get your signal back, and ready to flash a custom recovery (ie TWRP)
DiamondJohn said:
actually, out of interest I searched for your device, and it appears to simply be a Japan variant of an xt907 just as my xt905 is an Australian variant of the xt907. ie same device with different radio bands/frequencies
Have you tried installing TWRP for an xt907? thats what I have (and build) for my xt905. Assuming you are on JBBL, try ==> https://forum.xda-developers.com/droid-razr-m/general/twrp-3-1-1-xt907jbbl-t3652141 (nb: flash in bootloader mode)
For further instructions, see the "custom recovery" section of the first post at ==>https://forum.xda-developers.com/droid-razr-m/general/guide-faq-how-to-root-boot-unlock-t2869432
Click to expand...
Click to collapse
If your original firmware is JellyBean, then you will have a JBBL.
After you flash your original firmware, flash a custom recovery ie TWRP JBBL. Then, using this custom recovery flash the custom xt907 ROM of your choice with the same bootloader as yours; again assuming JBBL.

Custom ROM Issues - Do I need MM Bootloader and Modem Going from 5.0.1 to 6.0.1 ROM?

I notice there's a huge ...problem in custom rom makers and their ability to speak proper English. Not to offend them, but it's just really a problem. Decent instructions are skipped, and words are omitted...not sure if they're foreign or what's up with that.
The confusion is currently I'm on Android Stock 5.0.1 Rooted.
Only one thread for Aurora ROMS mention flashing "BL/CP". If I flash a new BL - firstly - would this NOT lock the bootloader/remove the ROOT off the device again?
In which case - wouldn't this remove Custom Recovery etc?
So confused. A lot of 6.0.1 based ROM makers are not even mentioning custom bootloader and modem.....which leaves me wondering if I need it

Forgot to mention I have bootloader currently unlocked

CtJackHarkness said:
I notice there's a huge ...problem in custom rom makers and their ability to speak proper English. Not to offend them, but it's just really a problem. Decent instructions are skipped, and words are omitted...not sure if they're foreign or what's up with that.
The confusion is currently I'm on Android Stock 5.0.1 Rooted.
Only one thread for Aurora ROMS mention flashing "BL/CP". If I flash a new BL - firstly - would this NOT lock the bootloader/remove the ROOT off the device again?
In which case - wouldn't this remove Custom Recovery etc?
So confused. A lot of 6.0.1 based ROM makers are not even mentioning custom bootloader and modem.....which leaves me wondering if I need it
Click to expand...
Click to collapse
I think it's less about the language barrier and more of an assumption that you already know what you need to know. It's sometimes hard to remember that a lot of people aren't on this site as much as the people who post ROMs are on it. So a lot of the basics get missed.
To answer your question though, you do need to be on the proper bootloader that corresponds to the rom that you want to be on (6.0.1 roms=6.0.1 bootloader) and depending on which model of the note 4 you have it will relock it. For instance, I have the SM-N910V and in order to get from the 5.0.1 bootloader to the 6.0.1 bootloader there's a bit of process involved (it's not as easy as just flashing a bootloader in Odin and being ready to go). I would look in the specific forum for your particular model to see how others are upgrading their bootloader and go from there. Most of the instructions that are posted with the roms in the main snapdragon section are for the F model and sometimes the G so the instructions for upgrading don't really apply anyway if you aren't using that model.