yashsingh1/xdaforums huggingface dataset:
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
We need to replace some file from stock to port to make them working... But we still can't figure out which files...
[Oppo F1s Guides, News, & Discussion] aweassassin:
How to uninstal TWRP??

my android always comes in twrp when I reboot the system. Please, help me friend..:crying:
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Flash stock rom.
[Oppo F1s Guides, News, & Discussion] QreNZi:
Just get this Oppo F1s, Any custom rom that works perfectly ?

I have the stock rom, Android 5.1.1

Is there any update to Nougat or Android O ?!

Thanks again!
[Oppo F1s Guides, News, & Discussion] Harsu04:
VIVO Y66

BROTHER YOU HAVE DONE A GREAT WORK FOR OPPO F1s CAN U PLEASE MAKE A CUSTOM ROM FOR VIVO Y66
[Oppo F1s Guides, News, & Discussion] Harsu04:
VIVO Y66

Bro did u have ported it from somewhere if yes please tell me how can i port custom rom for vivo y66 i am in big trouble i am just got irritated of using the rom please help me man
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
I can't make roms for y66 as i dont have that device but if u want then i can assist you in porting rom for your device.. You can PM me if u want assistance...
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Everything is in OP.. Pls try to read it first.
[Oppo F1s Guides, News, & Discussion] Harsu04:
VIVO Y66

SO can you give me ur whatsapp no. so that i contact you
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Check your PM
[Oppo F1s Guides, News, & Discussion] doubtfire1:
can anyone help, I have my f1s rooted in marshmallow, but I want to downgrade to lollipop but keep the root. how can I do this?
[Oppo F1s Guides, News, & Discussion] Aimster:
Could you try this Rom Porter : https://xdaforums.com/showthread.php?p=42192969#post42192969

I ported color os 3.0 on my neo 7 and no bugs at all. It works! I dont know if it works on oppo f1s.
[Oppo F1s Guides, News, & Discussion] Aashim:
I know this is off topic but can someone help rooting v7
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Oppof1s.jimdo.com/root
[Oppo F1s Guides, News, & Discussion] Writesin:
Can anyone help me, I have a A59m ,cpu is also MT6750,can I use these costom ROM?
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
You can but you have to modified them a little...
[Oppo F1s Guides, News, & Discussion] Writesin:
how to do it?thanks!
[Oppo F1s Guides, News, & Discussion] Writesin:
lollipop does works on my a59,but i can't updata android m,because f1s has a 3gb system.img and i can't make a smaller one,so i can't use M and N:crying:
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Whats your partition size?
[Oppo F1s Guides, News, & Discussion] Writesin:
system is 2gb
[Oppo F1s Guides, News, & Discussion] Aashim:
Color os for.marshmallow doesn't have volte support. Any workaround?
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Still you can get a lollipop custom rom.. 2gb is more then enough for it.
[Oppo F1s Guides, News, & Discussion] Writesin:
but how can i use marshmallow or nought....

---------- Post added at 03:42 PM ---------- Previous post was at 03:37 PM ----------

I think I could change the partition size of system,I have tried flashing the F1S 's OTA and it can load logo.I have another question. if i want to use custom rom,should i update marshmallow version, or must do it?
[Oppo F1s Guides, News, & Discussion] Aimster:
I hope this could help I found alot of stock roms:

Gionee- https://androidmtk.com/download-gionee-stock-rom-models

Cherrymobile (probably stock android)- https://www.needrom.com/category/cherry-mobile/

Lastly : www.needrom.com (which has a wide variety of stock roms there)
[Oppo F1s Guides, News, & Discussion] nithish_cbe:
Source code

[MENTION=6105738]sagargjasani264[/MENTION] relice source code on git hub it will help to fix problems from menu developer to use stable Rome's in feature
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
I don't have source codes.
[Oppo F1s Guides, News, & Discussion] zeroisgod:
is it safe to downgrade from MM to 5.1?
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Yes but make sure you choose proper files.
[Oppo F1s Guides, News, & Discussion] zeroisgod:
Do you use PhonePe?

I'd like to donate for more development on OppOf1s.

Keep up the good job mate.
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Sorry mate,

I only have paytm and paypal..
[Oppo F1s Guides, News, & Discussion] zeroisgod:
Okay. Will donate via paytm then.
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Thanks alot..

Check your PM
[Oppo F1s Guides, News, & Discussion] Caesar2819:
Can u make a video step by step how to root oppo f1s? It wil be helpfull thanks
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Already available by isumitfx

Search on youtube..
[Oppo F1s Guides, News, & Discussion] nisant:
Android m is available for australian version of this phone only.... And in their page they have stated

"These softwares are not compatible for devices of other regions excepet Australia due to the 2G closure in local market. For devices from other regions, some unpredictable problems may occur if the device is upgraded with this software "

Is the process of backing up NVDATA , NVRAM and MODEM supposed to prevent these issue.
[Oppo F1s Guides, News, & Discussion] stevedat:
Vietnam, I got the same version A1601 and updated to M , even though it's not official in Vn.

It works well.
[Oppo F1s Guides, News, & Discussion] nisant:
Ok will try
[Oppo F1s Guides, News, & Discussion] spidyrule:
Bro help me with the audio,any video bugs of miui 8 :o
[Oppo F1s Guides, News, & Discussion] stevedat:
Oppo service guy told me that they can help me downgrade 5.1, but it is unsure 100% works as it was - assuming errors encounter for it.

So, if you see it no point of giving it an update, I would advise you staying tune on 5.1
[Oppo F1s Guides, News, & Discussion] xanthrax:
thread closed until the download links will be available
[Oppo F1s Guides, News, & Discussion] Aimster:
Does network sim card in lineage works?
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Yes.. Its working...
[Oppo F1s Guides, News, & Discussion] rajoholic:
[MENTION=6105738]sagargjasani264[/MENTION] can i flash lineageOS thru recovery ctr v5.7.3 or it can only be flashed thru twrp M? im currently using mm for f1s and it's rooted. i tried flashing twrp M thru download tool, it gives me black screen. or should i use flashify to flash twrp M so it wont show me black screen? i havent tried flashify yet. i want ur opinion guys. thanks

Update:

i flashed twrp M in link thru flashify and still black screen. i flashed twrp L in link and it's in chinese. cant use it 'cause i might touch things i dont wanna touch. ctr works fine with my f1s so i returned it to that.

last time i flashed lineageOS in ctr, it just loop and loop. i flash the os and the 2 patches. please help me
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
First... No.. U can't flash Los 14.1 with ctr... It can only be flashed by TWRP-M

Second... Blank screen is a bug in twrp-M but its not permanent... After going to recovery mode wait for 30-50 sec.. Don't touch anything till that 30-50 sec... Then press power button or home button.. U will see screen..

Third.. Twrp-L isn't in Chinese.. Its default lenguege is Chinese.. So just go to settings option and change it to English..
[Oppo F1s Guides, News, & Discussion] rajoholic:
so i can install los in twrp M? also i saw in different sites that after flash the los, i need to flash gapps. in the link u give, no gapps. only los and 2 updates. is that ok? only flashing los and 2 patches? no need to flash gapps?
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Flashing gapps is all on you.. But its not nessesory thing to boot Los
[Oppo F1s Guides, News, & Discussion] rajoholic:
thank you very much. i will try 1st the twrp M and later the los. sorry for the trouble. thank you again
[Oppo F1s Guides, News, & Discussion] rajoholic:
[MENTION=6105738]sagargjasani264[/MENTION] is los pre rooted or do i have to root it manually?
[Oppo F1s Guides, News, & Discussion] rajoholic:
[MENTION=6105738]sagargjasani264[/MENTION] it says invalid zip file format when flashing thru twrp M. i flashed Los 14.1 zip. help. thanks
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Make sure ur zip is not currpted.. Download letest version... Its in first page... Zip is tested by me and its working fine...
[Oppo F1s Guides, News, & Discussion] amarnagvadiy:
Thanx

Thank you for supporting oppo f1s user.:)
[Oppo F1s Guides, News, & Discussion] Aimster:
Is network and fingerprint in cyanogenmod working?
[Oppo F1s Guides, News, & Discussion] xdadom:
Hi.. I had the same issue. I ended up using the zip from your original link here - https://drive.google.com/file/d/0B908irpXmnPTeHlqTkloWUFzZHc/edit - along with the patches which seemed to work ok. My issue is that when I lock the phone with the side button, I can't then wake the screen up! Is this a known issue or have I done something wrong?
[Oppo F1s Guides, News, & Discussion] MegumimiX:
I installed AOKP ROM and I wanted to go to recovery but I accidentally pressed restart so I pressed power button and volume down but once it shutdown, it doesnt turn on anymore PLS HELP!!!
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Keep pressing power button for a long time will restart your mobile
[Oppo F1s Guides, News, & Discussion] MegumimiX:
How long? It won't turn on!! When plugged into PC, it says OPPO Preloader.
[Oppo F1s Guides, News, & Discussion] ndis_cianjur:
whether this can be done from 5 rooted ??
[Oppo F1s Guides, News, & Discussion] HoewellYT:
There is no fingerprint support?

Is there no fingerprint support on the ROMs? :)
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
60sec at max

Regards,

Sagar Jasani

mod edit - link removed
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Sorry to say but No... Currently no fp support...

Regards,

Sagar Jasani

mod edit - link removed
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
I didn't got you...

Regards,

Sagar Jasani

mod edit - link removed
[Oppo F1s Guides, News, & Discussion] MegumimiX:
Still nothing even after 60sec
[Oppo F1s Guides, News, & Discussion] boonz19:
Any idea how to remove the red status bar "Root Detected" after rooting? I saw that there's a chinese xposed module that can remove this, but there's no mention of the source or whether the code is safe to be injected via xposed. Any ideas?

EDIT: The xposed module is in the 1st download link in the description of this youtube video (https://www.youtube.com/watch?v=T6yQWCSLZt4), filename: Hookcoloros_1.1_2_new.
[Oppo F1s Guides, News, & Discussion] Bharath hari:
How To update TWRP to M

=>Root Your stock L with kingroot

=>Flash TWRP-L with flashify app

=>Boot to TWRP

=>Backup NVDATA, NVRAM, MODEM

=>Install M update of ColorOS with TWRP

=>Restore NVDATA, NVRAM, MODEM

=>Install latest Supersu.zip

=>boot to 6.0 Rom

=>Flash TWRP-M with flashify app

I tired to install M update of Coloros with TWRP but it didn't work please help me to install it and get lineage rom
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
What actually didn't worked?
[Oppo F1s Guides, News, & Discussion] nithish_cbe:
[MENTION=6105738]sagargjasani264[/MENTION] In Cynogenmod 12.1 Sim Card not working
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Yep...

You are right...

Regards,

Sagar Jasani

mod edit - link removed
[Oppo F1s Guides, News, & Discussion] nithish_cbe:
So how to fix it any option
[Oppo F1s Guides, News, & Discussion] pheonixxdark:
hi guys.

can anyone tell me whats the most stable custom rom so far to use as a daily runner? at least the basic features working rom. calls, sound, gps etc...
[Oppo F1s Guides, News, & Discussion] Bharath hari:
I rooted my device and i intalled twrp for lollipop but you said for any future roms twrp m is required i tired to install marshmallow with twrp l but it didn't work everytime i flash it gave an error dthis is for a1601,this is R9 ) so post marshmallow file that work with twrp l... And please try to put an video about this in your Youtube channel. This will help many people
[Oppo F1s Guides, News, & Discussion] kikololi:
i didn't understand this step "Install M update of ColorOS with TWRP"
[Oppo F1s Guides, News, & Discussion] Bharath hari:
Install marshmallow update package with twrp L
[Oppo F1s Guides, News, & Discussion] nithish_cbe:
Miui link not working

That ling gos for patch file for android 7
[Oppo F1s Guides, News, & Discussion] FaZeSmasH:
I'm getting this error "status_download_exception(-1073414141) while trying to downgrade my phone to A.15 so that I can use kingroot to root it. Can someone help me out here?
[Oppo F1s Guides, News, & Discussion] aprilhtun94@gmail.com:
:crying:
[Oppo F1s Guides, News, & Discussion] boonz19:
Sorry, but does anyone have any idea about this? The red warning on status bar for rooted phone is killing me
[Oppo F1s Guides, News, & Discussion] Kilang Long's:
:crying:i can't find rooted on my phone OPPO F1S
[Oppo F1s Guides, News, & Discussion] rajoholic:
does cynogen mod have bugs?
[Oppo F1s Guides, News, & Discussion] TeKeyTech:
Updates?

Are there any updates regarding the custom roms.... :(
[Oppo F1s Guides, News, & Discussion] Captain Ezio:
Cyanoganmod Errors

Bro when i installed cyanoganmod with twrp, after starting it did not pick any sim. Also it gave so many errors like email has stopped or olaystire has stopped... Please guide me how to fix it
[Oppo F1s Guides, News, & Discussion] Captain Ezio:
will the bugs will get fixed ever? please fix the bugs and tell us

SIr please fix the bugs and tell us..and also can you please make videos for proper guidance....cuz some people are really newbie here..please....your help will be much appreciated
[Oppo F1s Guides, News, & Discussion] Sonu Raj:
Follow guide properly and make sure to wipe data after installl....if not succed then try miui 8 rom...

---------- Post added at 12:34 AM ---------- Previous post was at 12:31 AM ----------

Modified systemui apk will remove it but i dont have while cleaning pc it also deleted.. google it or ask from another users
[Oppo F1s Guides, News, & Discussion] Aashim:
Hi guys

Is there any custom rom for oppo f1 plus?
[Oppo F1s Guides, News, & Discussion] Captain Ezio:
Sir whuch guide... There isn't any specific guide provided for cyanogen mod like there is for lineage rom.. And whuch twrp will be required for cyanogen mod twrp L or twrp M? Kindly reply again
[Oppo F1s Guides, News, & Discussion] Ananaqil12:
[MENTION=6105738]sagargjasani264[/MENTION]

I've been tested the CyanogenMod, but it stable custom Rom with a wasteful of battery. I hope you can fix it ASAP.

And check your PM :)
[Oppo F1s Guides, News, & Discussion] chleoj:
[MENTION=6105738]sagargjasani264[/MENTION]

thanks for the custom recovery mate, successfully rooted my device, currently I just want to be rooted. I will try to make custom ROM for F1S if I have much time. :highfive:
[Oppo F1s Guides, News, & Discussion] kier0$3:
there's twrp on oppo a71?
[Oppo F1s Guides, News, & Discussion] PPPon:
I also want to try the CMod but how did you install it? Just flash from TWRP?
[Oppo F1s Guides, News, & Discussion] Ananaqil12:
Yes, but I don't remember which TWRP version that I used for flash the CMod. :confused:
[Oppo F1s Guides, News, & Discussion] PPPon:
Does sim work for you with CMod?
[Oppo F1s Guides, News, & Discussion] Ananaqil12:
Yeah, all of them (Dual Sim card right?). I do backup my nvram data partitions before and restore it on CyanogenMod. Performance is ok but have a wasteful battery.
[Oppo F1s Guides, News, & Discussion] juminten69:
i'm currently on android M and M TWRP. do i have to downgrade in order to flash the Cmod rom?
[Oppo F1s Guides, News, & Discussion] Moradhisham:
The audio in YouTube working??
[Oppo F1s Guides, News, & Discussion] Deomons:
Is there any custom RoM for oreo of the oppo f1s...?
[Oppo F1s Guides, News, & Discussion] juminten69:
can i downgrade using twrp? if i can, are the orders:

- boot twrp, flash L ColorOS, flash super su

- reboot system, flash twrp L with flashify

- boot twrp, flash cmod

(?)
[Oppo F1s Guides, News, & Discussion] asadc:
How to get replace CTR with twrp?

[MENTION=6105738]sagargjasani264[/MENTION] I have an oppo f1s which I had to unroot due to bootloop. I still have ctr and I want to change to twrp in order to flash custom roms. Do I need to reroot? Thanks
[Oppo F1s Guides, News, & Discussion] asadc:
mod edit - quote removed

I tried flashing twrp(your download link) via ctr. Rebooting into recovery mode causes my phone to turn off. Any suggestions
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
How can i revert back to stock recovery
[Oppo F1s Guides, News, & Discussion] Ashwinrg:
By flashing stock recovery again.
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
Please someone upload stock recovery for oppo f1s
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
Whenever i tried to restore my stock recovery backup it just reboots oppo logo shows and the phone restarts
[Oppo F1s Guides, News, & Discussion] evilhawk00:
have you tried downloading the stock rom from oppo official website and flash it? I mean download the whole A1601 zip firmware from oppo website
[Oppo F1s Guides, News, & Discussion] evilhawk00:
recovery image dump

Hi, there, I've made an recovery image dump for you.(via rashr app)

I have an A1601 3GB Ram Taiwan version which I think it might have the same hardware and recovery with yours. Check my phone and firmware info

A1601_TW_11_A.17_161003

you can download flash image tool rashr here https://play.google.com/store/apps/details?id=de.mkrtchyan.recoverytools&hl=zh_TW

Download recovery image dump here(my google drive):https://drive.google.com/open?id=0B1X00ZJdxkKybGh4OFc1OWFSWTA

Try using rashr to restore the stock recovery

tell me if it works so others can follow this direction to restore stock recovery.
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
HELLO ALL

As kingroot is now not working for our oppo f1s i am trying to create another mathod... But for that i need ur help... So who is in?
[Oppo F1s Guides, News, & Discussion] evilhawk00:
No need to do this, there's still an root method available now. I just restored stock from and rerooted yesterday, with superSU working. I'll post instructions once I arrive home
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Wow thats a great news... Waiting for your instructions... ?
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
Thanks

---------- Post added at 10:13 AM ---------- Previous post was at 10:09 AM ----------

Now is there any method available to unlock bootloader
[Oppo F1s Guides, News, & Discussion] evilhawk00:
Done

post is here

https://xdaforums.com/oppo-f1/how-t...rsu-custom-t3555767/post71009890#post71009890

---------- Post added at 11:48 AM ---------- Previous post was at 11:46 AM ----------

So are you able to restore stock recovery from my recovery dump?
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
Yes thank you very much

---------- Post added at 12:52 PM ---------- Previous post was at 12:49 PM ----------

Can we install custom rom on f1s
[Oppo F1s Guides, News, & Discussion] evilhawk00:
ummm........ looks like its not the problem of the phone's protection or something else. Maybe there's a problem of Backup/Restore function with this TWRP? Kindly suggest [MENTION=6105738]sagargjasani264[/MENTION] needs to check the backup restore function of TWRP especially it's a very early version. Also, thank you for porting TWRP for F1S
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
I am tryiing to rooot now.. but kiingorooot stuck at 90% and waiting for some response... i will check TWRP AS SOON AS I GET ROOT ACCES
[Oppo F1s Guides, News, & Discussion] evilhawk00:
Actually someone has found a way to install cyanogenmod directly on coloros, no need to unlock bootloader, but its unstable,check this out, this is for r9s, rom made by a Chinese developer WanXianLin, the author of the App "OPPO Tools"

http://community.oppo.com/en/forum.php?mod=viewthread&tid=50826

However, I think waiting for an unlocked bootloader is still necessary.

---------- Post added at 12:32 PM ---------- Previous post was at 12:01 PM ----------

well, thats too bad,, whether downgrade an older version or take advantage of an android CVE is another solution

http://www.cvedetails.com/product/19997/Google-Android.html?vendor_id=1224

Of course a1601 users can research exploit and make our own, some CVE related code can be downloaded from some git repository, however I think if you try to research CVE by yourself, kingoroot they can do it faster than you, as most android cve are multiple device compatible. So why not downgrade and wait for new exploit, and making something else for A1601 such as improving twrp
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
i have a diffrent idea..... what if i take ur system folder and convert it to system.img and flash it?
[Oppo F1s Guides, News, & Discussion] hamidmadrid:
how to root oppo f1s with the latest update please , i tried kingroot doesnt work
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Pls read the whole forum before posting...
[Oppo F1s Guides, News, & Discussion] evilhawk00:
？？？？what? Are we discussing about the root without an custom recovery and an unlocked bootloader?

If you already have twrp, you can always flash superSU zip to get root. you can not flash modified system image via OPPO stock recovery because the image needs to be signed and also the zip package.

Android CVE is the only solution.

I would rather suggest you downgrade to a older firmware,flash it via OPPO recovery, root with CVe method via kingoroot, then flash twrp via rashr, then modify the new rom update zip, remove the stock recovery from zip, flash update via twrp, then flash superSU zip to get root
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Sp flash tool cant flash TWRP...

BUT it can flash system.img

I don't know anything about Android CVE
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
I tried to downgrade and try kingroot... But it's not working
[Oppo F1s Guides, News, & Discussion] evilhawk00:
Kingroot?

How about the kingoroot apk I provided, I just confirmed it's working on my firmware.

This firmware is the one I'm using

http://downloads.oppo.com.s3.amazonaws.com/firmware/A1601/A1601TW_11_OTA_019_all_20161003_local.zip

Not sure if if can be flashed on devices sold in India, just an information

I re rooted yesterday and currently using magisk to bypass safetynet
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
Ok i will try it in evening.... Hope it does work... Thanks for link...
[Oppo F1s Guides, News, & Discussion] Sid.Agg81@gmail.com:
So in the end can we root oppo f1s latest version with kingoroot??
[Oppo F1s Guides, News, & Discussion] evilhawk00:
CVe is the method used by kingoroot or kingoroot on click root

Here's an example, Android CVE dirtycow, source code is on git

Dirty cow was also used to root OPPO R9s

https://github.com/timwr/CVE-2016-5195

---------- Post added at 09:14 AM ---------- Previous post was at 09:08 AM ----------

I can't tell because we are from different region, we have the different latest version.

Root works on my latest version but not yours. I can't test the above method\thought I said, which is downgrade and modify the OTa package then upgrade to latest because I already have my latest firmware which is just an older version in comparison to yours
[Oppo F1s Guides, News, & Discussion] sagargjasani264:
No worries... I will try and tell you... I am downloading your region version.. and indian a.19 vierion..

Yo... It worked... Downgraded to A.19 version... And tried kingroot... It worked...
[Oppo F1s Guides, News, & Discussion] yeebois:
my issue

My isssue is that i accidently wiped system and whenever i try and reinstall stock color os from twrp it thinks my phone is an r9 and wont update. even after trying to install r9 software it wont give me my os please help i am stuck in twrp without and os or a way to install stock recovery.