Database Users

[Q] GT-i9500 has no OS installed.

Hi everyone I just recently purchased a used S4 the GT-i9500. Everything seemed fine until I got home. It detected my T-Mobile Sim fine but I could only access 2G data and could not connect to any WiFi network I came across. The rom was stock 4.2.2 and the phone was rooted pre purchase. So after fiddling around for a few minutes I discovered the previous owner had flashed TWRP v2.4.1.0 as his choice for a Custom Recovery. Now at this point I had decided to flash on a Custom Rom and of course I first made a backup before flashing on WanamLite. Now after attempting to flash it I immediately received a failure. I tried turning off the signature verification and it did not flash. Now in my frustration i attempted to wipe everything and tried flashing Omega Rom v14. Now i was able to go through with the installation and choose what I wished to install and when I pressed Install things went along smoothly until I hit the app SecSafetyAssurance.apk where it freezes. This is a bump that I've run into at least 5 times already. I changed certain options I wanted to install and eventually made it past this and I am prompted to reboot. Now when I do this to my dismay I just receive a black screen. Upon pulling out the battery and attempting to reboot I still receive a black screen. when I boot back into the Recovery and attempt to reboot the system from within TWRP it warns me saying No OS Installed Are you sure you want to reboot. Im at a loss of what to do. I have read about other members suggesting to use ODIN but I am very confused about how to access Download Mode in order to flash a stock rom from SamMobile.com. I could use a few tips or maybe a few options that I'm left with in order to obtain the operation of my phone again. I would like to get my phone back and Im sure some users can relate to how Im feeling so any help at all would be greatly appreciated. Thank you very much in advanced!

JmastahJay56 said:
Hi everyone I just recently purchased a used S4 the GT-i9500. Everything seemed fine until I got home. It detected my T-Mobile Sim fine but I could only access 2G data and could not connect to any WiFi network I came across. The rom was stock 4.2.2 and the phone was rooted pre purchase. So after fiddling around for a few minutes I discovered the previous owner had flashed TWRP v2.4.1.0 as his choice for a Custom Recovery. Now at this point I had decided to flash on a Custom Rom and of course I first made a backup before flashing on WanamLite. Now after attempting to flash it I immediately received a failure. I tried turning off the signature verification and it did not flash. Now in my frustration i attempted to wipe everything and tried flashing Omega Rom v14. Now i was able to go through with the installation and choose what I wished to install and when I pressed Install things went along smoothly until I hit the app SecSafetyAssurance.apk where it freezes. This is a bump that I've run into at least 5 times already. I changed certain options I wanted to install and eventually made it past this and I am prompted to reboot. Now when I do this to my dismay I just receive a black screen. Upon pulling out the battery and attempting to reboot I still receive a black screen. when I boot back into the Recovery and attempt to reboot the system from within TWRP it warns me saying No OS Installed Are you sure you want to reboot. Im at a loss of what to do. I have read about other members suggesting to use ODIN but I am very confused about how to access Download Mode in order to flash a stock rom from SamMobile.com. I could use a few tips or maybe a few options that I'm left with in order to obtain the operation of my phone again. I would like to get my phone back and Im sure some users can relate to how Im feeling so any help at all would be greatly appreciated. Thank you very much in advanced!
Click to expand...
Click to collapse
Well first thing is get the latest stock firmware for your variant from my sign and get odin 3.07
For download mode power off phone unplug,, press volume down home and power all together till something pops up and release then press volume up and connect to pc
Open odin click pda and select that firmware u downloaded start the process
For more info check my sign help thread link it has more options on the same
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JmastahJay56 said:
Hi everyone I just recently purchased a used S4 the GT-i9500. Everything seemed fine until I got home. It detected my T-Mobile Sim fine but I could only access 2G data and could not connect to any WiFi network I came across. The rom was stock 4.2.2 and the phone was rooted pre purchase. So after fiddling around for a few minutes I discovered the previous owner had flashed TWRP v2.4.1.0 as his choice for a Custom Recovery. Now at this point I had decided to flash on a Custom Rom and of course I first made a backup before flashing on WanamLite. Now after attempting to flash it I immediately received a failure. I tried turning off the signature verification and it did not flash. Now in my frustration i attempted to wipe everything and tried flashing Omega Rom v14. Now i was able to go through with the installation and choose what I wished to install and when I pressed Install things went along smoothly until I hit the app SecSafetyAssurance.apk where it freezes. This is a bump that I've run into at least 5 times already. I changed certain options I wanted to install and eventually made it past this and I am prompted to reboot. Now when I do this to my dismay I just receive a black screen. Upon pulling out the battery and attempting to reboot I still receive a black screen. when I boot back into the Recovery and attempt to reboot the system from within TWRP it warns me saying No OS Installed Are you sure you want to reboot. Im at a loss of what to do. I have read about other members suggesting to use ODIN but I am very confused about how to access Download Mode in order to flash a stock rom from SamMobile.com. I could use a few tips or maybe a few options that I'm left with in order to obtain the operation of my phone again. I would like to get my phone back and Im sure some users can relate to how Im feeling so any help at all would be greatly appreciated. Thank you very much in advanced!
Click to expand...
Click to collapse
Flashing through odin is one option.... some users have reported that there were some hiccups when installing omega 14 because of the aroma script.....try a different rom...there are many others to choose from....or you could flash stock via odin as said on the earlier comment good luck

Feedback
Today I attempted to use ODIN to flash now I am still currently attempting this. When I press the volume down key, power, and home button it takes me to the custom recovery TWRP instead of download mode. The phone did this when I first purchased it. When I still had what appeared to be the stock rom it would always take me to the recovery. When I would use the volume up instead of down it would take me to the factory test mode now mind you this happened when the OS was still installed. When i try that combination now i just receive a blank black screen. Are there any other ways to boot into download mode?

[Q] Phone won't boot anymore

It started a few days ago. My phone would suddenly reboot and such and wouldn't be able to get past the Samsung screen until I went into TWRP and rebooted through there. Now my phone won't even do anything. It just keeps rebooting immedialty. Should I install the Stock firmware again and then go back to Cyanogenmod 10.2?

bvm1228 said:
It started a few days ago. My phone would suddenly reboot and such and wouldn't be able to get past the Samsung screen until I went into TWRP and rebooted through there. Now my phone won't even do anything. It just keeps rebooting immediately. Should I install the Stock firmware again and then go back to Cyanogenmod 10.2?
Click to expand...
Click to collapse
First, can you give us some information...
What model of the S4 is it?
What baseband are you on?
Etc, etc...

bvm1228 said:
It started a few days ago. My phone would suddenly reboot and such and wouldn't be able to get past the Samsung screen until I went into TWRP and rebooted through there. Now my phone won't even do anything. It just keeps rebooting immedialty. Should I install the Stock firmware again and then go back to Cyanogenmod 10.2?
Click to expand...
Click to collapse
Since you have twrp, I assume you have an i337 and you're on mdl firmware. If so, I'd flash the stock mdl firmware and see if you still have the problem. If you do then it's most likely a hardware problem and you should look into warranty.

Soft brick - Need some guidance

It's been awhile since I changed anything on this phone, I've been running CM11 with no issues. The wife was playing with my phone which is on cm12 and wanted me to upgrade it. Great, I hate having to touch her phone but ok.
1. Did a straight upgrade to CM12 nightly (couple nights ago build) with gapps from CM site. After the install everything crashes on the initial load, it's like the baseband is jacked and doesn't know how to handle the new google play services because everything crashes.
2. Went back and wiped internal everything this time, re installed nightly and gapps. No change.
3. Tried step 2 a couple more times and different gapps from PA and other random sites (micro, light, stock versions) and then TWRP just died on me. It's asking for a password when I first go in so now I'm stuck there. Tried to use ODIN to install the latest TWRP after converting it with another script found here (i'll find the link).
so, I'm probably going to have to use ODIN to restore some stock version of S4 ATT but I really don't know which one is stock that would work with CM12. I don't want to get caught in the safestrap crap of dual boot and whatever else. Any help is greatly appreciated.

You'll need to Odin the mdl firmware in Odin. Be careful as it will want to update itself after you flash it. See sammobile.com for the firmware.
Sent from my Nexus 9 using XDA Free mobile app

Awesome, thanks!
Flashed the stock, towelroot, twrp from google play and cm12 nightly. Perfect and back where I left off. Thanks!!

Ok.. I did a bad thing I guess. after working for a couple weeks I tried to reset the phone while cm12.1 was installed. All it did was keep restarting TWRP and was stuck there. So I figured there was an issue with the twrp install or something whatever, I went to flash back to stock mdl in odin. Instead of selecting PDA I selected Phone and it failed on the first attempt. Then I selected PDA and it installed correctly (Said passed). Now I'm stuck on the AT&T logo on boot. I tried to reinstall the stock rom again and the same results. Where do I go from here??!?

kronikwisdom said:
Ok.. I did a bad thing I guess. after working for a couple weeks I tried to reset the phone while cm12.1 was installed. All it did was keep restarting TWRP and was stuck there. So I figured there was an issue with the twrp install or something whatever, I went to flash back to stock mdl in odin. Instead of selecting PDA I selected Phone and it failed on the first attempt. Then I selected PDA and it installed correctly (Said passed). Now I'm stuck on the AT&T logo on boot. I tried to reinstall the stock rom again and the same results. Where do I go from here??!?
Click to expand...
Click to collapse
Boot into the stock recovery and do a factory reset
Sent from my Nexus 9 using XDA Free mobile app

Ok, factory reset worked on the second try. Sent it in to a boot loop on the first go around, odd. Thanks!

Unstable & Unusuable

It sounds melodramatic but maybe someone else has encountered the same problem and can help.
I got my phone last week and used it for a couple hours before I decided to root and flash a custom ROM onto the phone. I didn't realize that the kernel had dmverity and proceeded to try and root my phone like any other phone.
I followed the usual steps in installing root for the first time. I used Odin to flash twrp onto the phone and proceeded to restart into recovery. I had forgotten to copy supersu to my phone before I restarted it and this is where my problems began. I swiped on the twrp page where it warns of dmverity but because I didn't transfer supersu I had to restart the phone and get it on. The problem being the phone was now stuck in a bootloop and I somehow managed to get supersu onto the memory and flashed it. I was able to boot into the rom but it was extremely unstable. I could work for maybe 5 minutes before the phone froze, got very hot, then shut down. It would go into a bootloop and succeed maybe 1/20 times, all the while the phone got very hot. I flashed a custom rom onto it and it kind of worked but would still freeze and restart every once in a while. I found the stock bootloader, rom, cp, csc, and flashed those. My phone is now stock everything but the crashes still occur frequently (basically every time I try to use it) and I'm at a total loss as to what to do.
I've rooted all of my phones since I got my S3 several years ago and I've never had a problem like this. Anyone know how I can fix this? My phone is model G935w8 so I know it has the exynos processor and rooting is possible, but I must've done something horribly wrong for it to be like this. Any help is appreciated.

N910F problems - emmc read fail/ flashing stock no longer boots the phone.

Hello. I had gotten this Note 4 phone which had a custom recovery installed on it but the rom seemed to be official, on 5.1
The first thing I did was go to samfirmware and flash a 6.0.1 rom, it went fine, phone was working properly. Then I got greedy and wanted to test a Note 7 ported rom. Flashed TWRP recovery and from within I flashed RamROM http://forum.xda-developers.com/note-4/snapdragon-dev/rom-sm-n910g-ramrom-t3400349 , I downloaded the one from post#2 , the N910F one that my phone is and after it flashed to ROM it simply stopped working. My phone no longer booted, was booting me directly into Download mode with emmc read error. I kept trying to flash the stock rom which I previously flashed and it would fail.
Afterwords I used Smart Switch to reinitialize the phone, writing my phones S/N and that failed as well but at least that made my phone boot into a different recovery where it said to connect to Kies. Once again I used Smart Switch and this time it was successful 100%. My phone even booted into the OS and was working, however, while using it, after 10 minutes the phone restarted into Download mode with emmc read error.
So all in all the phone is functional but it starts to lag and restart. Now I'm kinda stuck again since I've tried to flash the firmware I got from Samfirmware through Odin, it succeded but it just doesn't boot, it goes to Recovery, tries to apply an update and I get an error.
Is there anything I can do? I can't believe the emmc could've broken just from trying to flash that custom rom, especially that afterwards I was even able to boot into the phone.
Thanks for reading and I appreciate the help.

engwee said:
Hello. I had gotten this Note 4 phone which had a custom recovery installed on it but the rom seemed to be official, on 5.1
The first thing I did was go to samfirmware and flash a 6.0.1 rom, it went fine, phone was working properly. Then I got greedy and wanted to test a Note 7 ported rom. Flashed TWRP recovery and from within I flashed RamROM http://forum.xda-developers.com/note-4/snapdragon-dev/rom-sm-n910g-ramrom-t3400349 , I downloaded the one from post#2 , the N910F one that my phone is and after it flashed to ROM it simply stopped working. My phone no longer booted, was booting me directly into Download mode with emmc read error. I kept trying to flash the stock rom which I previously flashed and it would fail.
Afterwords I used Smart Switch to reinitialize the phone, writing my phones S/N and that failed as well but at least that made my phone boot into a different recovery where it said to connect to Kies. Once again I used Smart Switch and this time it was successful 100%. My phone even booted into the OS and was working, however, while using it, after 10 minutes the phone restarted into Download mode with emmc read error.
So all in all the phone is functional but it starts to lag and restart. Now I'm kinda stuck again since I've tried to flash the firmware I got from Samfirmware through Odin, it succeded but it just doesn't boot, it goes to Recovery, tries to apply an update and I get an error.
Is there anything I can do? I can't believe the emmc could've broken just from trying to flash that custom rom, especially that afterwards I was even able to boot into the phone.
Thanks for reading and I appreciate the help.
Click to expand...
Click to collapse
read this - http://forum.xda-developers.com/note-4/help/note-4-issues-t3453048
there are links to more threads related to your issue.
Short version though:
it is dying. install wake lock application, add it to start up and set settings to #4.
accept the fact that your phone will eat the battery faster and one day WILL die completely

Thanks for your response. Regarding the Wake lock application, I'm starting to look into it, I asume I'll have to be rooted. I'll try to recover it again using Smart Switch and then I can only hope I can install TWRP and still have it functional.
Previously when I was able to get it working with Smart Switch, entering the recovery messed everything up. It said it was applying an update and that got stuck.

engwee said:
Thanks for your response. Regarding the Wake lock application, I'm starting to look into it, I asume I'll have to be rooted. I'll try to recover it again using Smart Switch and then I can only hope I can install TWRP and still have it functional.
Previously when I was able to get it working with Smart Switch, entering the recovery messed everything up. It said it was applying an update and that got stuck.
Click to expand...
Click to collapse
no need to be rooted, just download, install and set it to autostart

I'll try it if I somehow manage to get the phone working again, Smart Switch just fails now midway through.

golden_m said:
no need to be rooted, just download, install and set it to autostart
Click to expand...
Click to collapse
Is this the app you're talking about? https://play.google.com/store/apps/details?id=eu.thedarken.wl&hl=en
What exactly does it do?
I managed to restore it eventually with Smart Switch, it took quite a few tries, then I switched to my Macbook when I saw the app was available on it too and the 3rd try succeded. I only did it because I saw the 2nd try had the % much higher than the first.

engwee said:
Is this the app you're talking about? https://play.google.com/store/apps/details?id=eu.thedarken.wl&hl=en
What exactly does it do?
I managed to restore it eventually with Smart Switch, it took quite a few tries, then I switched to my Macbook when I saw the app was available on it too and the 3rd try succeded. I only did it because I saw the 2nd try had the % much higher than the first.
Click to expand...
Click to collapse
yes, that is the app.
i've read it does not allow your phone to go to sleep mode.
drains the battery faster, but this is the only way to keep note 4 working without swapping its motherboard...

I have a question, my gf recently bought a note 4 and we may swap our phones and if we do, i'll flash CM and tinker with it because i find this phone very interesting, just a question, does this bug affect the N910C (exynos) model? Do i have something to worry about? Because the phone is warrianty protected and if it's the case, i don't want to break it. I hope someone will shed some light on this