I rooted my Captivate last night using Super One Click and the Youtube video from MobileTechVideos. I installed Titanium Backup and uninstalled all the bloatware along with Tethering Manager to allow for mobile hotspots. However, this morning I discovered I now have no 3G access and can only access the internet via my wireless network. I haven't come across anything online to suggest how to fix this problem. I've tried restarting my phone but this didn't work. Does anyone know how to solve this problem?
try to write *#*#4636#*#* in phone dialer and choose Phone information or sth like this.You can find wirless preferences there. in "preferred network type" set WCMDA preferred
vapno666 said:
try to write *#*#4636#*#* in phone dialer and choose Phone information or sth like this.You can find wirless preferences there. in "preferred network type" set WCMDA preferred
Click to expand...
Click to collapse
How do I save this preference? It's reverting back to the default.
so you have some error in rom or radio. you should flash radio first to some matching to your spl(hboot) and try to change this value in phone inf. again. What value is default and hold in preferred network type?
btw When I change this in my device, phone is reconecting.
vapno666 said:
so you have some error in rom or radio. you should flash radio first to some matching to your spl(hboot) and try to change this value in phone inf. again. What value is default and hold in preferred network type?
btw When I change this in my device, phone is reconecting.
Click to expand...
Click to collapse
The defualt is GSM/WCDMA auto (PRL).
I'm not exactly sure how to do what you're saying. How do I go about flashing radio?
You have to download android sdk. this pack include fastboot.exe(if you have win). it's flashing terminal working with hboot(spl). start your phone by pushing I/O btn and camera button(to spl),and connect device . system will search drivers. you can find them in sdk tools folder (C:\Program Files\Android\android-sdk\extras\google\usb_driver) . if drivers will install corectly, you can flash radio. in command line (start menu>run write cmd) write cd C:\Program Files\Android\android-sdk\tools and enter. next write "fastboot flash radio <location and name of radio>" (fastboot flash radio c:\radio.img)
Olso you can flash radio from recovery,from option flash from zip, if radio is packed to zip and signed. you can find this too.it's beetter flashing i think. I wrote abt this at the end becouse I forgot
I know that I can made much mistakes in my posts. sorry for that . my english is not very well ...
I use:
Nexus S (i9023)
CyanogenMod 7.1
Radio I9023XXKB3
Problem:
At first I couldn't get 3G to work, I got stuck at EDGE.
So I tried to change the radio into an older one (KB3), then I could get the phone into UMTS, but everythime that happens, the GSM service would stop working (Emergency calls only). It will work again when it drops to GPRS/EDGE (I check this using *#*#4636#*#* - Phone Information)
I've tried to do a clean install, but the problem persists. So right now I must use GSM only setting from Phone Information.
Has anyone else had this problem and know a way to fix this?
Thank you
use kb1 radio its more stable on i9023 devices..
tell me if it works.. if it doesnt try reflashing your rom.. or switch to other roms.
After flashing KB1 radio, I think I'm back at getting stuck on EDGE again ^^;
Oh, and I cannot change "WCDMA only" to "GSM auto (PRL)". Everytime I choose "GSM auto (PRL)" it will revert back automatically to "WCDMA only".
EDIT: I just tried this method:
1. Use "Root Explorer" and navigate to /efs directory
2. Mount "R/W"
3. Cut these three files nv_data.bin , nv_data.bin.md5 and nv.log
4. Paste it at the ROOT of the SD Card.
5. Reboot your phone and you will have your 3G connection back.
(By alexwbaule)
Click to expand...
Click to collapse
And I just got 3G back! Yay!
I would back up those files.. Deleting/losing your EFS folder will mess you up later on.
Hi Friends
I have been following the forum for a year and have finally registered as i found a question to which there is no solution i could find yet . .
I have a rooted Atrix 2 running NUMA http://forum.xda-developers.com/showthread.php?t=1960679
Its one of the best and most stable ROMS i have tried but i am facing one issue on it . .
I'm not able to use wifi tethering on my phone . .
A network is created and my nexus 7 connects to it but the internet simply does not work!
Any tricks to make it work?
Have FXZed several times and done fresh installs but no luck
Tried some apps to kick start it but they caused a reboot so i uninstalled . .
any fix for it?
Bump!
still awaiting a response . .
Atrix2numa said:
Bump!
still awaiting a response . .
Click to expand...
Click to collapse
I've never had that problem, or any problem on NUMA. If I did, though, I would re-download the ROM and start over.
Did/do you have any additional mods or tweaks installed? Xposed framework and modules, for example?
If I had a dollar for every time I said that, I'd be making money in a very weird way.
I tried that . .even FXZed my phone . . . .
btw does it make a difference as i have an indian Atrix 2 MB865 but this rom is based on AT&T ICS?
8288599 4308
BUMP!
Its still not working . .
Atrix2numa said:
I tried that . .even FXZed my phone . . . .
btw does it make a difference as i have an indian Atrix 2 MB865 but this rom is based on AT&T ICS?
Click to expand...
Click to collapse
That does not make a difference
Sent from my MB865 using Tapatalk 2
What are you using for this? Are you using the native app or a 3rd party app?
This has already been answered. Please search before posting.
Try changing you apn type to 'not set' in apn settings
Screenshot APN
Hi Guys i did read about the APN settings however i am not able to edit the APN settings and there is a lock on it . .
I have attached screenshot of the settings . .
Also i noticed another issue recently . .The phone auto reboots if i try to transfer files via Superbeam before QR code gets generated
Could this be a related issue as it also uses wifi tethering indirectly?
R u able to create a new apn?
Super_Commando said:
R u able to create a new apn?
Click to expand...
Click to collapse
Nope
I tried to tinker with my phone using below thread. .
http://forum.xda-developers.com/showthread.php?t=1160452
Now I am getting option to setup new APN
Can You please suggest settings to make it work on Airtel in India?
Atrix2numa said:
I tried to tinker with my phone using below thread. .
http://forum.xda-developers.com/showthread.php?t=1160452
Now I am getting option to setup new APN
Can You please suggest settings to make it work on Airtel in India?
Click to expand...
Click to collapse
You can find apn settings for Airtel on internet. Just keep 'apn type' to 'not set' in apn settings.
This worked fine for me on Vodafone
Internet tethering is now working for me thanks to these settings i found. .
On the device, tap the Settings icon
Choose Wireless & Networks (or Wireless Controls)
Choose Mobile Networks and then Access Point Names
Press the Menu key and then New APN
Select Name, enter: Airtel GPRS and tap OK.
Select APN, enter: airtel-ci-gprs.com
Scroll down to APN TYPE and enter: default or (Select : Internet)
Press the Menu key and select Save
Tap on Airtel GPRS to turn it on
However I'm still unable to use Superbeam!
Phone restarts if i try to send anything through it . .
Hey guys.
so basically this phone has the issue for 3 months and more, and i didnt try to fix it.
so now i really need to put the sim card in it.
so the IMEI was null/null.
after i reflashed the stock rom again, it showed that it's /01 = (nothing)/01
if it works fine if i take it to some guy who has a box i will.
if it doesn't tell me what to do please
PS: sorry i cant post picture cuz i have not posted 10 posts yet
catalin23 said:
sound like there is no efs partition . how it ended up like this? after you"ve flashed a custom rom? what phone model it is ? do you have any backup ?
Click to expand...
Click to collapse
It happened after a failure attempt of changing the imei because in turkey if the phone is not from turkey region you need to change the imei to a turkish one.
And i didn't flash a custom rom only stocks one.
And i don't have a backup.
catalin23 said:
what phone do you have?
Click to expand...
Click to collapse
Galaxy Note II
GT-N1705
catalin23 said:
i"ve found something .
>Open up the dialer and enter – *#06# to check your IMEI number, if you see “IMEI Null or 000000 ”, then you need to reconfigure the settings to fix the no signal or not registered on network problem on your Android phone
> In the dialer, type- *#197328640# or *#*#197328640#*#*
>You will be prompted into the Command mode, provided On the screen, Select on Common, normally option 6
> Now Select (FTM) Option 1
>FTM is for debugging and testing., (Field Test Mode)
>If (FTM) is on, you will have to turn this OFF
>As soon as you turned this off your NULL or altered IMEI number will be restored
>(Important) Without leaving the Command screen, press the Menu key, the button that’s found left of the Home button.
> Select Key input and enter option 2. In this case, you want to turn it off
>Wait for a minute. This will turn your FTM OFF
> Remove your battery and SIM card for two minutes
>Place your battery in your phone, (important) do not place your SIM card in.
> When the phone is booted, enter the command mode again dial – *#197328640#
>Select the Debug Screen, normally option 1
>After that, choice phone control, option eight
>Click on nas control, option 3
>Afterwards, click “RRC (HSDPA), option 5
>To Fix not registered on network or Null IMEI #, click RRC revision, option 2.
>Choose the released of your phone, here we will choose option 5 (HSDPA only)
>Final step to fix Null IMEI # is to turn off your phone off and insert your Sim card
or
>Insert your Sim card, afterwards reboot your phone
tell me if it works
Click to expand...
Click to collapse
*#197328640# or *#*#197328640#*#*
both are not working
catalin23 said:
sorry to hear that .i don"t know another method but you shoul google for "Galaxy Note II
GT-N1705 no imei" and you could find a fix . but i recommend you to go to get a specializated repair . they will fix it .
Click to expand...
Click to collapse
K thanks for helping.
Hello,
I've rooted a few phones, but I don't really do too much with them, I mostly root them to have an easier time transferring all data from one phone to the next, and for being able to use a couple of root apps. Basically, I'm not all that good at this stuff, but I can get by most of the time with enough research and time. I have not been able to find a thread that's been able to help me with this problem, though.
My V20's reception practically fell off the map after rooting it. I've been researching and trying to find a way to flash the modem files that I dumped with LGUP before I rooted it via dirtysanta, but I'm not having any luck. The files don't have an extension, but from what I can gather, they should be image files. I'm not 100% on that because I can't seem to find what file type they actually are, my computer only lists them with the description of "file". I run Windows 7 if that matters.
Anyway, based on what I've found so far, the files I need to flash in order to fix my reception problem are:
modem_COM5
modemst1_COM5
modemst2_COM5
fsg_COM5
I can't get fastboot to work, I'm not sure how to link my phone to a file path on my computer from command terminal so that's not been working for me. I've also tried renaming the files by adding ".img" to the end, zipping them and installing them with twrp afterward, but they won't install, giving me an error of "META-INF/com/google/android/update-binary"
Ultimately, I'm lost. Any help is greatly appreciated, as I've spent hours pouring over threads and trying to fix my stupid reception problems. I have no reception at home, none at work, and I have spotty reception while driving or out in other places, but it's generally terrible. I used to have low reception at home, but I could always make a call if I needed to, and I'd have great reception driving around. Then I rooted my phone and my reception tanked.
platypus25_5 said:
Hello,
I've rooted a few phones, but I don't really do too much with them, I mostly root them to have an easier time transferring all data from one phone to the next, and for being able to use a couple of root apps. Basically, I'm not all that good at this stuff, but I can get by most of the time with enough research and time. I have not been able to find a thread that's been able to help me with this problem, though.
My V20's reception practically fell off the map after rooting it. I've been researching and trying to find a way to flash the modem files that I dumped with LGUP before I rooted it via dirtysanta, but I'm not having any luck. The files don't have an extension, but from what I can gather, they should be image files. I'm not 100% on that because I can't seem to find what file type they actually are, my computer only lists them with the description of "file". I run Windows 7 if that matters.
Anyway, based on what I've found so far, the files I need to flash in order to fix my reception problem are:
modem_COM5
modemst1_COM5
modemst2_COM5
fsg_COM5
I can't get fastboot to work, I'm not sure how to link my phone to a file path on my computer from command terminal so that's not been working for me. I've also tried renaming the files by adding ".img" to the end, zipping them and installing them with twrp afterward, but they won't install, giving me an error of "META-INF/com/google/android/update-binary"
Ultimately, I'm lost. Any help is greatly appreciated, as I've spent hours pouring over threads and trying to fix my stupid reception problems. I have no reception at home, none at work, and I have spotty reception while driving or out in other places, but it's generally terrible. I used to have low reception at home, but I could always make a call if I needed to, and I'd have great reception driving around. Then I rooted my phone and my reception tanked.
Click to expand...
Click to collapse
I can make you a zip to flash the files in TWRP
Sent from my ONEPLUS A6010 using Tapatalk
clsA said:
I can make you a zip to flash the files in TWRP
Sent from my ONEPLUS A6010 using Tapatalk
Click to expand...
Click to collapse
Thanks! Do I just need to email you the modem files?
platypus25_5 said:
Thanks! Do I just need to email you the modem files?
Click to expand...
Click to collapse
no you can put them in the zip below
Here's your zip > https://drive.google.com/open?id=1RiNnyS-iF34a543zQAchi70-YAUvc3hn
rename your files to
modem
modemst1
modemst2
fsg
and add them to the zip and save it
copy to phone and flash it
clsA said:
no you can put them in the zip below
Here's your zip
rename your files to
modem
modemst1
modemst2
fsg
and add them to the zip and save it
copy to phone and flash it
Click to expand...
Click to collapse
I appreciate you making the zip, but after flashing the files my phone won't boot up. When I power it on it says that my device has failed a routine safety check and will not boot. I'm accustomed to my phone saying that when I boot it up, as it's done that ever since rooting it, but then it shows the LG logo and then shuts off and will not turn on again unless I take the battery out and reinsert it. I have to go through that process at least 2 or 3 times to get the phone to load up. When I got it to load up again, the top bar of my phone said I had no service, which it did not before flashing the files. I've gone back into twrp and tried re-flashing it again to no avail.
If it makes a difference there were two sets of files when I went to flash, even though I only put in one set. I renamed them according to your instructions, and there were one set that just had the file name and .img at the end (like fsg.img) and another set that started with ._ and ends with .img (like ._fsg.img)
Thanks again for taking the time, I really appreciate the help.
platypus25_5 said:
I appreciate you making the zip, but after flashing the files my phone won't boot up. When I power it on it says that my device has failed a routine safety check and will not boot. I'm accustomed to my phone saying that when I boot it up, as it's done that ever since rooting it, but then it shows the LG logo and then shuts off and will not turn on again unless I take the battery out and reinsert it. I have to go through that process at least 2 or 3 times to get the phone to load up. When I got it to load up again, the top bar of my phone said I had no service, which it did not before flashing the files. I've gone back into twrp and tried re-flashing it again to no avail.
If it makes a difference there were two sets of files when I went to flash, even though I only put in one set. I renamed them according to your instructions, and there were one set that just had the file name and .img at the end (like fsg.img) and another set that started with ._ and ends with .img (like ._fsg.img)
Thanks again for taking the time, I really appreciate the help.
Click to expand...
Click to collapse
I tested the zip myself it works as expected.
The unlocked bootloader message has nothing to do with your issue.
What sim card are you using?
What are your apn settings?
What was the last Rom you flashed?
Are you on Oreo?
Sent from my ONEPLUS A6010 using Tapatalk
clsA said:
I tested the zip myself it works as expected.
The unlocked bootloader message has nothing to do with your issue.
What sim card are you using?
What are your apn settings?
What was the last Rom you flashed?
Are you on Oreo?
Sent from my ONEPLUS A6010 using Tapatalk
Click to expand...
Click to collapse
It's a nano sim from at&t, and at&t is my carrier. I doubt it's relevant, but I use a prepaid plan.
My app settings are:
Name: ATT Nextgenphone
APN: nxtgenphone
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
MMSC: http://mmsc.mobile.att.net
MMS proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: default,mms,supl,hipri,fota
APN protocol: IPv4/IPv6
APN roaming protocol: IPv4/IPv6
I believe the last ROM I flashed was H91510e_VTR_CA_OP_1205.kdz
Using the DirtySanta method of rooting, I think I flashed that so I could actually root the phone and then updated to another version, possibly. I'll include my software info in case that is helpful.
I'm not on oreo, I'm running nougat
Android version: 7.0
Android security patch level: November 1, 2017
Baseband version: MPSS.TH.2.0.1.c3-00011M8996FAAAANAZM-1.69323.1. 69645.2
Kernel version: 3.18.31
Build number: NRD90M
Software version: H91010r
Security software version: MDF v2.0 Release 4
Thanks again for all of your help.
platypus25_5 said:
It's a nano sim from at&t, and at&t is my carrier. I doubt it's relevant, but I use a prepaid plan.
My app settings are:
Name: ATT Nextgenphone
APN: nxtgenphone
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
MMSC: http://mmsc.mobile.att.net
MMS proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: default,mms,supl,hipri,fota
APN protocol: IPv4/IPv6
APN roaming protocol: IPv4/IPv6
I believe the last ROM I flashed was H91510e_VTR_CA_OP_1205.kdz
Using the DirtySanta method of rooting, I think I flashed that so I could actually root the phone and then updated to another version, possibly. I'll include my software info in case that is helpful.
I'm not on oreo, I'm running nougat
Android version: 7.0
Android security patch level: November 1, 2017
Baseband version: MPSS.TH.2.0.1.c3-00011M8996FAAAANAZM-1.69323.1. 69645.2
Kernel version: 3.18.31
Build number: NRD90M
Software version: H91010r
Security software version: MDF v2.0 Release 4
Thanks again for all of your help.
Click to expand...
Click to collapse
Maybe theirs a setting in the Hidden menu that will help
using a build.prop editor (thanks @ezzony)
Change ro.build.target_operator from ATT to OPEN to bring back all the missing Modem_Settings and the ones that were also missing in regular Settings>Mobile Networks. Also reverted to stock icons in status bar.
in the dialer type > *#546368#*910#
then go to Field Test>Modem Settings>Network Mode and set to Automatic
reboot
you can also check that Volte and VoWifi are enabled from the hidden menu Modem settings
Also in Settings>Mobile Network>Network Mode be sure it's set to the top one (GSM/WCDMA/LTE auto)
clsA said:
Maybe theirs a setting in the Hidden menu that will help
using a build.prop editor (thanks @ezzony)
Change ro.build.target_operator from ATT to OPEN to bring back all the missing Modem_Settings and the ones that were also missing in regular Settings>Mobile Networks. Also reverted to stock icons in status bar.
in the dialer type > *#546368#*910#
then go to Field Test>Modem Settings>Network Mode and set to Automatic
reboot
you can also check that Volte and VoWifi are enabled from the hidden menu Modem settings
Also in Settings>Mobile Network>Network Mode be sure it's set to the top one (GSM/WCDMA/LTE auto)
Click to expand...
Click to collapse
I downloaded a build.prop editor and changed the build target operator setting, but I'm not sure what you mean by reverting to stock icons in status bar or how to do that. Which settings were missing in Settings>Mobile Networks?
I got into that other menu, but under field test>modem settings I can choose either engineering mode or PDP setting.
Engineering mode says "modemprotocol" in the top corner, with previous, up, down, and next buttons. Under that it says ITEM_2G: 0
[Serving Cell Information]
ARFCN: 0
FL_Timeout_v: 0
RXLEV: 0
C1: 0
C2: 0
Other pages for engineering mode are for Item HSPA:0 [HSDPA Information], Item_NM [general information], Item_3G: 0 [RRC State and Serving Cell information], Item_LTE: 0 [LTE Information]
PDP settings says ModemProtocol at the top and has options for [0] Set LG Fast Dormancy, [1] APN setting, [2' Block DataRecovery.
VoLTE and VoWifi are enabled in the hidden menu, but I can't access Settings>Mobile Network>Network Mode. I can't figure out how to check the GSM and other options. I can go to Settings>Mobile Networks and then I can go to:
Mobile data - just turns it on or off
Mobile data reminder
Review reminder settings
International data roaming
Disable 2G
Access Point Names
Search for AT&T MicroCell - When I search, none are found
I hope I'm not just throwing too much useless information for you to sift through. I'm just not entirely sure of what all is relevant.
platypus25_5 said:
I downloaded a build.prop editor and changed the build target operator setting, but I'm not sure what you mean by reverting to stock icons in status bar or how to do that. Which settings were missing in Settings>Mobile Networks?
I got into that other menu, but under field test>modem settings I can choose either engineering mode or PDP setting.
Engineering mode says "modemprotocol" in the top corner, with previous, up, down, and next buttons. Under that it says ITEM_2G: 0
[Serving Cell Information]
ARFCN: 0
FL_Timeout_v: 0
RXLEV: 0
C1: 0
C2: 0
Other pages for engineering mode are for Item HSPA:0 [HSDPA Information], Item_NM [general information], Item_3G: 0 [RRC State and Serving Cell information], Item_LTE: 0 [LTE Information]
PDP settings says ModemProtocol at the top and has options for [0] Set LG Fast Dormancy, [1] APN setting, [2' Block DataRecovery.
VoLTE and VoWifi are enabled in the hidden menu, but I can't access Settings>Mobile Network>Network Mode. I can't figure out how to check the GSM and other options. I can go to Settings>Mobile Networks and then I can go to:
Mobile data - just turns it on or off
Mobile data reminder
Review reminder settings
International data roaming
Disable 2G
Access Point Names
Search for AT&T MicroCell - When I search, none are found
I hope I'm not just throwing too much useless information for you to sift through. I'm just not entirely sure of what all is relevant.
Click to expand...
Click to collapse
reboot after build.prop edit
then all the options show up
the icons change on their own as a result of the build prop edit
clsA said:
reboot after build.prop edit
then all the options show up
the icons change on their own as a result of the build prop edit
Click to expand...
Click to collapse
Alright, I've done this, I've also made a few different access point names for att to try and see if any of those have better reception. Nothing's working all that great, but hopefully at least one of them works a little better than what I've been used to.
Currently I still have no reception where I'm used to having one or two bars around the house. I'm not sure if there is anything else to do without opening up the phone and replacing any parts. If there is anything else you can think of that I might try, please let me know.
Do you think that changing the screen would make any difference on reception? I did have to have mine changed shortly after rooting the phone, but I can't really imagine that could be the cause since I still do get occasional reception.
Thanks again for all of your help.
platypus25_5 said:
Alright, I've done this, I've also made a few different access point names for att to try and see if any of those have better reception. Nothing's working all that great, but hopefully at least one of them works a little better than what I've been used to.
Currently I still have no reception where I'm used to having one or two bars around the house. I'm not sure if there is anything else to do without opening up the phone and replacing any parts. If there is anything else you can think of that I might try, please let me know.
Do you think that changing the screen would make any difference on reception? I did have to have mine changed shortly after rooting the phone, but I can't really imagine that could be the cause since I still do get occasional reception.
Thanks again for all of your help.
Click to expand...
Click to collapse
Any hardware change could easily damage the antenna or it may be completely unplugged. Check the tear down video on ifixit
Sent from my ONEPLUS A6010 using Tapatalk
I am having the same problem after following the root guide - no data. I'm on T-Mobile with an ATT phone running H91010r. I installed your modem.bat file with my dumped modem files using twrp, I changed the ATT buildprop to open, rebooted and made sure to select the first auto option. I tried dialing the secret menu number but it gives an error. Zero data. Everything else seems to be working phone. Data worked on stock phone before rooting. Please help!
Classpro said:
I am having the same problem after following the root guide - no data. I'm on T-Mobile with an ATT phone running H91010r. I installed your modem.bat file with my dumped modem files using twrp, I changed the ATT buildprop to open, rebooted and made sure to select the first auto option. I tried dialing the secret menu number but it gives an error. Zero data. Everything else seems to be working phone. Data worked on stock phone before rooting. Please help!
Click to expand...
Click to collapse
it's most likely an APN problem
what do you mean the dialer code did not work ? it works on all H910
When I put in the dialer code and hit call I get "ussd code RUNNING" and then "connection problem or invalid mmi code"
I did get 4g working by reseting the Sim card, so I'm not panicking, but it seems slower than before. APN is off the t-mobile site.
Classpro said:
When I put in the dialer code and hit call I get "ussd code RUNNING" and then "connection problem or invalid mmi code"
I did get 4g working by reseting the Sim card, so I'm not panicking, but it seems slower than before. APN is off the t-mobile site.
Click to expand...
Click to collapse
are you sure you have a H910 ?
the dialer code depends on the Motherboard
*#546368#*910#
see the 910# at the end must match your phone
the Verizon LG V20 VS995 dialer code is disabled > worth reading
The unlocked LG V20 US995 would use dialer code *#546368#*995#
I'm not sure what works with the F800 version
clsA said:
are you sure you have a H910 ?
Click to expand...
Click to collapse
Yes, I'm sure. AT&T version, model number LG-H910. Running rooted software version H91010r.
I have the same problem on 800l entered the menu changing the model 996 at the end, as I understand it, without twrp how can I fix the problem?