Hello.
I tired to downgrade my system and somehow messed everything up. My tablet will not do any thing other than boot loop.
my device VZW SCH-I800 Running 2.3.5
Problems.
1. Error in recovery mode
-E:failed to mount /efs (Invalid argument)
-E:check_selective_file:Cant mount /efs
(seems to be missing EFS file)
(photos below)
2. VZW Stock will not do anything.
-downloaded( SCH-I800_VZW_EC02.zip and SCH-I800_VZW_stock.zip)
neither worked.
i have used heimdall to flash and some work some dont
3. The boot loader is in a loop.
I have read alot of post that might suggest that there is nothing to do about this matter.
HELP PLZ
Thanks For all Who Read
you need to flash the kernel and a new rom i'm going to explain why.
first of all you need to flash your device with odin, i recommend you read a lot how can you flash with odin, the kernel and rom. you have a boot loop because the rom is not compatible with your device and i think the kernel have issiues to. see the description of the rom you flash it and see others roms and kernels if you have galaxy tab i recomend you download in www.humberos.com.br and when you learn how to flash it, put in download mode and do it
---------- Post added at 01:01 AM ---------- Previous post was at 12:59 AM ----------
and dont forget make a full data wipe and dalvik cache wipe to
im not rooted. i dont think i will be able to do odin rom....
About rooting, flashing the Kernel will root it. Try it?
update:
Thanks for all the help..... i just got it back working..... i flashed the VZW 2.3.5 Rooted Kernel.
im so happy ...Because i thought i lost it....
I'm currently on cwm 4 but have heard it didn't support charging would you recomment me to download rz recovery even taken into consideration the bugs
And whenever I am in cwm 4 (I'm on stock Rom) it says can't mount recovery last log
Do I need to root again after flashing custom Rom as I've got superuser.on stock Rom
And last question do I need to back up.imei I've got bml5.IMG but I'm bot going to be unlocking only flashing roms
ti0 said:
I'm currently on cwm 4 but have heard it didn't support charging would you recomment me to download rz recovery even taken into consideration the bugs
And whenever I am in cwm 4 (I'm on stock Rom) it says can't mount recovery last log
Do I need to root again after flashing custom Rom as I've got superuser.on stock Rom
And last question do I need to back up.imei I've got bml5.IMG but I'm bot going to be unlocking only flashing roms
Click to expand...
Click to collapse
u r rooted automatically while flashing custom rom.
about imei, u dont need to, but if u want it to, so go ahead.
ti0 said:
I'm currently on cwm 4 but have heard it didn't support charging would you recomment me to download rz recovery even taken into consideration the bugs
And whenever I am in cwm 4 (I'm on stock Rom) it says can't mount recovery last log
Do I need to root again after flashing custom Rom as I've got superuser.on stock Rom
And last question do I need to back up.imei I've got bml5.IMG but I'm bot going to be unlocking only flashing roms
Click to expand...
Click to collapse
Root will probably be with u even if you flash a new rom.
If not it means that your root is not compatible with the rom and u might have to change it
how do you backup imei as havnt discovered efs partition on sgm
You can Store the file in your sdcard.
Sent from GALAXY mini...Please Thank Me when you think I deserve it
To be rooted there must be superuser.apk inside new rom, because by installing new boot.img and clearing data the whole internal memory will be overwritten.
Hello All,
I am on stock v4.1.2, flashed myself.
Now I want to move on to custom ROM.
My current stock ROM is rooted, and I have also unlocked my bootloader.
Now when I want to install custom ROM, I need to flash CWM, and when I do (tried v6.2.8 and v6.0.3.1), and install any ROM, my WiFi becomes unresponsive (failed to turn on). When I flash V20A back, everything turns normal.
I also gone through http://forum.xda-developers.com/showthread.php?t=2180138&page=43, and install the unsecure boot image after installing CWM 6028, but this make my custom rom hang on startup (on bootload screen).
Kindly help me out.
I have search a lot in the P880 forum, and didn't find any help regarding to this problem.
[email protected] said:
Hello All,
I am on stock v4.1.2, flashed myself.
Now I want to move on to custom ROM.
My current stock ROM is rooted, and I have also unlocked my bootloader.
Now when I want to install custom ROM, I need to flash CWM, and when I do (tried v6.2.8 and v6.0.3.1), and install any ROM, my WiFi becomes unresponsive (failed to turn on). When I flash V20A back, everything turns normal.
I also gone through http://forum.xda-developers.com/showthread.php?t=2180138&page=43, and install the unsecure boot image after installing CWM 6028, but this make my custom rom hang on startup (on bootload screen).
Kindly help me out.
I have search a lot in the P880 forum, and didn't find any help regarding to this problem.
Click to expand...
Click to collapse
i dont understand what the recovery has to do with the wifi. recovery is just an interface to easy install something, copy paste , edit , change permissions , etc , things we do using adb commands. it is just an environment. its something else u are doing wrong there.
<EDIT> yea i saw the thread on your link. others seem to have same problem but with the unsecure boot. why do u need unsecure boot if the bootloader is unlocked ? just install teamwin recovery or cwm recovery and the rom u want.
kessaras said:
i dont understand what the recovery has to do with the wifi. recovery is just an interface to easy install something, copy paste , edit , change permissions , etc , things we do using adb commands. it is just an environment. its something else u are doing wrong there.
<EDIT> yea i saw the thread on your link. others seem to have same problem but with the unsecure boot. why do u need unsecure boot if the bootloader is unlocked ? just install teamwin recovery or cwm recovery and the rom u want.
Click to expand...
Click to collapse
Well, I did. And it all went fine, and I am able to install various custom ROMs, and after I install custom ROM, my WiFi becomes unresponsive. I am completely at lost. I also tried MIUI v5 which is non-CM10.2 based, and it also showed the same issue.
Here are my steps to install a custom ROM.
- Currently I am on my V20A stock ROM.
- Root the stock ROM using the All-In-One-Toolkit v1.4.1
- Flush the CWM 6031 using ADB as
Code:
su
cat /mnt/sdcard/recovery.img > /dev/block/mmcblk0p1
sync
- After reboot, my device has the CWM.
- Copy custom ROM zip files to my device, and reboot to recovery
- Wipe out by data and cache
- Install ROM
thats it
And when I boot into the new custom ROM, my WiFi do not work.
Please help.
[email protected] said:
Well, I did. And it all went fine, and I am able to install various custom ROMs, and after I install custom ROM, my WiFi becomes unresponsive. I am completely at lost. I also tried MIUI v5 which is non-CM10.2 based, and it also showed the same issue.
Here are my steps to install a custom ROM.
- Currently I am on my V20A stock ROM.
- Root the stock ROM using the All-In-One-Toolkit v1.4.1
- Flush the CWM 6031 using ADB as
Code:
su
cat /mnt/sdcard/recovery.img > /dev/block/mmcblk0p1
sync
- After reboot, my device has the CWM.
- Copy custom ROM zip files to my device, and reboot to recovery
- Wipe out by data and cache
- Install ROM
thats it
And when I boot into the new custom ROM, my WiFi do not work.
Please help.
Click to expand...
Click to collapse
not exactly.
And here are my steps to install a custom ROM (if currently I am on my V20A stock ROM)
1. Root the stock ROM using the All-In-One-Toolkit v1.4.1
2. Unlock bootloader using All-In-One-Toolkit v1.4.1 or manually like this.
3. Flash the CWM 6.0.4.5 or 6.0.4.4 or TeamWin Recovery
4. Reboot the device in recovery.
5. Enter ADB sideload and install custom rom or using ADB bootloader or using ADB copy the rom in sd card and use install in recovery.
6. Wipe data and cache and reboot system.
<<STEPS DESCRIBED IN HELP SECTION - FREQUENTLY ASKED QUESTIONS>> ( by the way those must be updated too )
kessaras said:
not exactly.
And here are my steps to install a custom ROM (if currently I am on my V20A stock ROM)
1. Root the stock ROM using the All-In-One-Toolkit v1.4.1
2. Unlock bootloader using All-In-One-Toolkit v1.4.1 or manually like this.
3. Flash the CWM 6.0.4.5 or 6.0.4.4 or TeamWin Recovery
4. Reboot the device in recovery.
5. Enter ADB sideload and install custom rom or using ADB bootloader or using ADB copy the rom in sd card and use install in recovery.
6. Wipe data and cache and reboot system.
<<STEPS DESCRIBED IN HELP SECTION - FREQUENTLY ASKED QUESTIONS>> ( by the way those must be updated too )
Click to expand...
Click to collapse
I did wipe the data and cache after installing the custom ROM. But the result is the same; No WiFi response.
However, I always copy my custom ROMs by mounting my phone through USB to my Win8 laptop, and then copy the ROM file through windows explorer. And then install the ROM from the CWN recovery. Thus do not use ADB for copying files, or installing custom ROM as mentioned above. If this is the main issue reason, then advice.
Also I haven't tried TWRP till yet. Will do now. Till then, what else I can do.
Thanks for the quick replies.
i dont know what else you may doing wrong then. one was the insecure boot which is useless since u have unlocked the bootloader and the other that u had flash older version of cwm recovery. maybe compatibility issue with that version of cwm rec ? test and see.
format system also, when installing a new rom, not just data, cache & dalvik
kessaras said:
i dont know what else you may doing wrong then. one was the insecure boot which is useless since u have unlocked the bootloader and the other that u had flash older version of cwm recovery. maybe compatibility issue with that version of cwm rec ? test and see.
Click to expand...
Click to collapse
One piece of detail I missed to mentioned in my case previously was that, I unlocked my phone using the method mentioned in the thread http://forum.xda-developers.com/showthread.php?t=2263627 as I was unable to unlock using the official method.
After I unlock my bootloader, I have flashed V20A KDZ several times, and each time the SW Upd mode show me that my bootloader status is unlocked. Thus after first attempt of unlocking, I never came across need to unlocked my bootloader again as each time when I do the KDZ flash, I get the bootloader status as unlocked. And after each flash of KDZ, I was able to install CWM and custom ROMs, and boot into them successfully.
Is this something causing the issue?
[email protected] said:
One piece of detail I missed to mentioned in my case previously was that, I unlocked my phone using the method mentioned in the thread http://forum.xda-developers.com/showthread.php?t=2263627 as I was unable to unlock using the official method.
After I unlock my bootloader, I have flashed V20A KDZ several times, and each time the SW Upd mode show me that my bootloader status is unlocked. Thus after first attempt of unlocking, I never came across need to unlocked my bootloader again as each time when I do the KDZ flash, I get the bootloader status as unlocked. And after each flash of KDZ, I was able to install CWM and custom ROMs, and boot into them successfully.
Is this something causing the issue?
Click to expand...
Click to collapse
Now, I have repeated using CWM 6.0.4.5 and TWRP, and no breakthrough .... Starting to lose hope ... Help !!!
sorry , personally i dont know what else u may doing wrong there . and no it doesnt matter which way u unlock the phone, but since u unlock it , it stays that way until u lock it.
at least stock rom is working fine ? if that works fine there, then just install only custom kernel, do your tweaks, install another launcher and then delete the default, etc. u can do any modification u like to the stock one to make it look and work the way u want it.
kessaras said:
sorry , personally i dont know what else u may doing wrong there . and no it doesnt matter which way u unlock the phone, but since u unlock it , it stays that way until u lock it.
at least stock rom is working fine ? if that works fine there, then just install only custom kernel, do your tweaks, install another launcher and then delete the default, etc. u can do any modification u like to the stock one to make it look and work the way u want it.
Click to expand...
Click to collapse
Does it help if I installed a custom kernel on my custom ROM (with WiFi issue). My understanding is that the WiFi driver is compiled inside the kernel. So changing the kernel might reduce the issue. What do you think? If yes, then kindly advice me on which kernel should I install on my till now custom ROM MIUI v5 http://en.miui.com/download-79.html.
[email protected] said:
Does it help if I installed a custom kernel on my custom ROM (with WiFi issue). My understanding is that the WiFi driver is compiled inside the kernel. So changing the kernel might reduce the issue. What do you think? If yes, then kindly advice me on which kernel should I install on my till now custom ROM MIUI v5 http://en.miui.com/download-79.html.
Click to expand...
Click to collapse
a developer would never release a rom in public with wifi issues by default and since i have already tested all roms available before i end up to one, i can say that they all worked , but only had small bugs on homescreen. really i dont know what you are doing wrong and not even a teamviewer connection wouldnt help in this case. but on stock your phone works fine ? only in a custom rom u have this issue ?
<<EDIT>> did you also do a full format before going to another rom ? there is a choice in teamwin recovery ( dont know if its in cwm also ) to format data. careful i dont mean to wipe everything you see because you will remove the recovery too and u will have to flash it back. the format option deletes everything besides the recovery. if you dont format before you go to a totally different rom, then you maybe have issues. especially when going from stock to custom, differences are huge. you must format before flashing. and dont forget the gapps, if they are not inluded in rom. ( in your case miui there must have them inside, because i see its 256 mb+)
kessaras said:
a developer would never release a rom in public with wifi issues by default and since i have already tested all roms available before i end up to one, i can say that they all worked , but only had small bugs on homescreen. really i dont know what you are doing wrong and not even a teamviewer connection wouldnt help in this case. but on stock your phone works fine ? only in a custom rom u have this issue ?
<<EDIT>> did you also do a full format before going to another rom ? there is a choice in teamwin recovery ( dont know if its in cwm also ) to format data. careful i dont mean to wipe everything you see because you will remove the recovery too and u will have to flash it back. the format option deletes everything besides the recovery. if you dont format before you go to a totally different rom, then you maybe have issues. especially when going from stock to custom, differences are huge. you must format before flashing. and dont forget the gapps, if they are not inluded in rom. ( in your case miui there must have them inside, because i see its 256 mb+)
Click to expand...
Click to collapse
YES. When I flashed stock V20A, I never had issues with Wifi. Its when I install custom ROM, and any custom ROM.
So I suppose, either there is something wrong in my installing method, or in my stock ROM that won't allow WiFi to work on any custom ROM. But how much influential will be the stock ROM if it is being replaced by a custom ROM?
Well, I haven't formated before I install any custom ROM, as it was not instructed in the forums. But I will do that now, and let you know the results shortly.
Thanks again for the replies.
[email protected] said:
Well, I haven't formated before I install any custom ROM, as it was not instructed in the forums.
Click to expand...
Click to collapse
yea some informations are always missing from the instructions generally , but this is a developer forum , so it doesnt always include informations that are 100% well known to be done. So format and install again and tell me if its everything ok.
kessaras said:
yea some informations are always missing from the instructions generally , but this is a developer forum , so it doesnt always include informations that are 100% well known to be done. So format and install again and tell me if its everything ok.
Click to expand...
Click to collapse
Can you direct me how to install a custom ROM using ADB? Since when I format my /data, all of my custom roms that I copied will get deleted. So the only remaining option is to copy them using ADB.
[email protected] said:
Can you direct me how to install a custom ROM using ADB? Since when I format my /data, all of my custom roms that I copied will get deleted. So the only remaining option is to copy them using ADB.
Click to expand...
Click to collapse
What?????
Why would wiping your /data folder on internal storage delete your custom ROMs? Surely you keep them on your external SD-Card?
[email protected] said:
Can you direct me how to install a custom ROM using ADB? Since when I format my /data, all of my custom roms that I copied will get deleted. So the only remaining option is to copy them using ADB.
Click to expand...
Click to collapse
you dont need to copy it . u can open adb sideload from recovery and on pc use command : adb sideload [path/filename of rom.zip]
SimonTS said:
What?????
Why would wiping your /data folder on internal storage delete your custom ROMs? Surely you keep them on your external SD-Card?
Click to expand...
Click to collapse
So you are saying that, I copy them to external_sd, and then do the data format. Ok ... Will do and let you know.
BTW, I also found V20B. I will start with this stock rom instead of V20A. This might improves some thing.
[email protected] said:
So you are saying that, I copy them to external_sd, and then do the data format. Ok ... Will do and let you know.
BTW, I also found V20B. I will start with this stock rom instead of V20A. This might improves some thing.
Click to expand...
Click to collapse
AT LAST .... FIXED ...
I did two things, V20B, and format /system, /data before installing new ROM. So my steps were:
1) Flush V20B instead of V20A
2) After rooting, and installed CWM 6044 touch, copy custom ROM MIUI to external SDCARD
3) Reboot into recovery, and format /system, /data, and /cache partitions
4) Install custom ROM from external SDCARD
5) Wipe data and cache
6) Reboot into the new world
:good: formatting did the work sorry i didnt think of it earlier.
Got a question about unlocking bootloader and the current state of my phone:
First up, this is the current state of my phone:
Bootloader locked
Rooted
Dual Recovery installed (??)
RomAur 4 installed
So basically the state of my phone is that I followed to guide in the RomAur post to install their ROM.
When I reboot my phone I get the extra buzz so I can hold Vol up/down to enter recovery.
I have root, but the sys partition is not mountable as R/W in RomAur 4 but I can flash zips in recovery.
I want to install iHackers v2 ROM and maybe also unlock bootloader as it seems all camera issues have been sorted (correct me if I'm wrong) (are there are reasons I should/shouldn't unlock the bootloader?).
What do I have to do to go from RomAur 4 to iHackers 2.0 with the current state of my phone? Should I bother unlocking bootloader to use a 3rd party kernel?
Are [nandroid] backups done in CWM any use at all as it seems that when flashing a ROM you then have to use flashtool to flash a kernel and radio so I'm guessing that the backups wont be able to restore these either?
Thanks for all the help and bloody hard work you guys put into developing for our phones.
cyberguru said:
Got a question about unlocking bootloader and the current state of my phone:
First up, this is the current state of my phone:
Bootloader locked
Rooted
Dual Recovery installed (??)
RomAur 4 installed
So basically the state of my phone is that I followed to guide in the RomAur post to install their ROM.
When I reboot my phone I get the extra buzz so I can hold Vol up/down to enter recovery.
I have root, but the sys partition is not mountable as R/W in RomAur 4 but I can flash zips in recovery.
I want to install iHackers v2 ROM and maybe also unlock bootloader as it seems all camera issues have been sorted (correct me if I'm wrong) (are there are reasons I should/shouldn't unlock the bootloader?).
What do I have to do to go from RomAur 4 to iHackers 2.0 with the current state of my phone? Should I bother unlocking bootloader to use a 3rd party kernel?
Are [nandroid] backups done in CWM any use at all as it seems that when flashing a ROM you then have to use flashtool to flash a kernel and radio so I'm guessing that the backups wont be able to restore these either?
Thanks for all the help and bloody hard work you guys put into developing for our phones.
Click to expand...
Click to collapse
As long as you save backs up on an external SD card you should be fine. I don't know what data you can restore back though. Photos, texts, apps, etc, should be okay. I'd back up with Titanium or something then just restore after. (I recommend nandroid also for your own peace of mind and hassle free experience)
Best thing to do is just do it from fresh to save you any hassle if you're going to wipe the phone anyway. It's best to wipe the phone before so nothing goes wrong.
http://forum.xda-developers.com/showthread.php?t=2539008
As it says:
Copy the ROM to External SDCard.
Install iHackers Advanced Stock Kernel.
Reboot into Recovery.
Make Sure to do a Wipe Data/Factory Reset before Installing the ROM.
Start the Installation. (Install Zip >> Choose Zip for External SDCard).
Switch Off Your Phone (Do Not Reboot). Select No to Disable Flash Recovery Confirmation.
Install Kernel.ftf for C6903 (.290) or Kernel.ftf for C6902 (.290) with Flashtool to get compatible Kernel and Baseband.
Reinstall Your Desired Kernel.
Reboot and Enjoy.
Click to expand...
Click to collapse
All camera issues sorted in iHackers v1.2.
Personally I'm running iHackers's PureStock.
If you want to unlock the bootloader, DON'T FORGET TO BACKUP TA partition.
You can unlock bootloader (after you have backed up TA), then install iHackers kernel, and go to Philz recovery (I believe it is volume up, but might be down), then click on wipe, then wipe for installing new ROM (or something like that), then install the iHackers ROM.zip
Regards,
~J2C
Just2Cause said:
If you want to unlock the bootloader, DON'T FORGET TO BACK TA partition.
Click to expand...
Click to collapse
Why I should do that? With 4.3 still no problem unlock bootloader and I am already on 4.3 and I didn't backup anything. The only reason is Warranty.
To be honest I don't really have any 'data' on my phone that I would miss if I lost it... some photo's, MP3's.. I only do nandroid backups so that I can test a new ROM, if I don't like it or it doesn't work I can just go back to Recovery and restore the nandroid and continue as I was but that was on Samsung devices and I'm a little worried as to the usefulness of the nandroids on this phone. Why do we have to flash kernel and radio using flashtool and why can't they be installed with the .zip/ROM?
I have a backup of my TA partition; I did it as a step in rooting/flashing some other ROM but didn't really know why I was doing it but it's stored away for whatever reason I need it!
I think for the time being I'll keep a locked BL, but I want to get rid of this ROM off my phone. I really need /sys to be mounted as R/W and I'm having some WiFi issues with RomAur 4.
eclyptos said:
Why I should do that? With 4.3 still no problem unlock bootloader and I am already on 4.3 and I didn't backup anything. The only reason is Warranty.
Click to expand...
Click to collapse
Well, you said it. Warranty.
cyberguru said:
I think for the time being I'll keep a locked BL, but I want to get rid of this ROM off my phone. I really need /sys to be mounted as R/W and I'm having some WiFi issues with RomAur 4.
Click to expand...
Click to collapse
So far, you can't get /sys mounted as R/W with a locked bootloader, even on custom ROMs.
If you want full root, the only way is to unlock bootloader.
Regards,
~J2C
Just2Cause said:
Well, you said it. Warranty.
So far, you can't get /sys mounted as R/W with a locked bootloader, even on custom ROMs.
If you want full root, the only way is to unlock bootloader.
Regards,
~J2C
Click to expand...
Click to collapse
Dont think thats 100% accurate - you can get Root with /sys mounted as R/W on roms <4.3. I had iHackers (1.2 I think) working with r/w system partition I just got a little flash-happy when a 4.3 ROM came out and went and flashed it.
Doesn't matter now anyway.. I unlocked the BL! Flashed iHackers 2... what a pile of crap (my opinion)... installed a load of stuff I purposefully unticked in Aroma and has lost me root.. yay.
If I restore a nandroid of iHackers 1.2 from CWM will I brick my phone in any way seeing as I'm currently on Android 4.3 with all the kernels and radios that brings..? That is of course saying I can get into recovery...
[edit]
Can't get into CWM... brilliant. I guess I'm going to have to use flashtool to downgrade and root my phone or something like that now.. Wouldn't mind but I'm at work and have to download ROMs on my phone because of work proxies!
cyberguru said:
Dont think thats 100% accurate - you can get Root with /sys mounted as R/W on roms <4.3. I had iHackers (1.2 I think) working with r/w system partition I just got a little flash-happy when a 4.3 ROM came out and went and flashed it.
Doesn't matter now anyway.. I unlocked the BL! Flashed iHackers 2... what a pile of crap (my opinion)... installed a load of stuff I purposefully unticked in Aroma and has lost me root.. yay.
If I restore a nandroid of iHackers 1.2 from CWM will I brick my phone in any way seeing as I'm currently on Android 4.3 with all the kernels and radios that brings..? That is of course saying I can get into recovery...
Click to expand...
Click to collapse
Yea, I meant it can't be done on 4.3
Well, Why don't you just flash stock ROM (4.3) then 257 then 534 and then install iHackers 1.2 without any problems.
Regards,
~J2C
Right, deleted last post but in summary; got root back but no Play Store and no recovery installed so did some good old fassioned searching:
Over in Original Android dev there is a discussion for Root on 4.3. The first post has links to kernels with recoveries and SuperSU by chainfire... downloaded Philz and SuperSU and now just need to figure out how to flash the two of them..
I take it something like
Code:
fastboot flash boot filename.img
will take care of flashing kernel to my UL phone so then I power on and press Vol Up, Vol down to enter recovery and flash SuperSU?
Wish me luck