Help: I have a AT&T SGH-I777 Galaxy S2 - Been rooted and has had ROM on before

[kingrat]

Behind the battery it says SGH-I777 Front is 4 button AT&T Samsung Galaxy S2 that has Been rooted before

My brother was playing around and playing with different roms and it has sat in a drawer and left alone - I want to get it working again to use for traveling when I go to Brazil for work.

When it boots up the SPLASH screen says GT-I9100 - I KNOW THIS IS WRONG before you make 100 comments - the It is a SGH-I777 phone - I get it. Save those comments and I dont know how this rom is on here or how it works.

I can go into Android system recovery <3e> if I hold power and volume up

and download mode if I hold power and volume down

in download mode it says Product name: GT-I9100
Custom Binary dopanload: yes (2 counts)
Current Binary: Samsung Official

Can someone tell me how to blow all of this away and to get it to a point where I can install a working semi updated rom?

Thanks. I have tried several threads and no luck.

 

[creepyncrawly]

Someone along the way installed an I9100 rom on it, and the install package they used included the I9100 secondary bootloader. The text that you read in download mode comes from the secondary bootloader, and that is why it says GT-I9100. Since you have 3e recovery, it now has the stock kernel, and maybe have been flashed back to stock, but without replacing the secondary bootloader. That is my best guess.

I would suggest that you flash the latest available full stock firmware including the secondary bootloader. That would be Jelly Bean, UCMD8, which you can get from the Download Repository. See the link in my signature. Once you flash that, you may still have the I9100 splash screen, but download mode should indicate I777 again.

After that, you can run stock JB, either with the stock kernel, or with the AJK v4.9 No Swap Kernel which will run stock JB just fine. Or you can install the custom firmware of your choice.

Either way, you should probably root using Framaroot with the Aragorn exploit, and then use Mobile Odin Pro or Mobile Odin Lite to install the boot.img extracted from the AJK zip file. Once the install is complete, boot into recovery and flash the AJK zip file because otherwise the buttons will not work. Then after that, you can either stay with AJK plus stock, or install a custom firmware.

Hope this helps, and if you have any questions, I usually check in here at least once every day or two.

 

[kingrat]

Someone along the way installed an I9100 rom on it, and the install package they used included the I9100 secondary bootloader. The text that you read in download mode comes from the secondary bootloader, and that is why it says GT-I9100. Since you have 3e recovery, it now has the stock kernel, and maybe have been flashed back to stock, but without replacing the secondary bootloader. That is my best guess.

I would suggest that you flash the latest available full stock firmware including the secondary bootloader. That would be Jelly Bean, UCMD8, which you can get from the Download Repository. See the link in my signature. Once you flash that, you may still have the I9100 splash screen, but download mode should indicate I777 again.

After that, you can run stock JB, either with the stock kernel, or with the AJK v4.9 No Swap Kernel which will run stock JB just fine. Or you can install the custom firmware of your choice.

Either way, you should probably root using Framaroot with the Aragorn exploit, and then use Mobile Odin Pro or Mobile Odin Lite to install the boot.img extracted from the AJK zip file. Once the install is complete, boot into recovery and flash the AJK zip file because otherwise the buttons will not work. Then after that, you can either stay with AJK plus stock, or install a custom firmware.

Hope this helps, and if you have any questions, I usually check in here at least once every day or two.

Thanks. Ok - I downloaded I777UCMD8 Stock Binaries (Android 4.1.2 Jelly Bean) from the download repository and installed it. Splash screen says samsung and then goes to ATT globe and then starts. Error right away says gmail something not working - Wifi doesn't work - about device Model Samsung - SGH-I777 Android 4.1.2 Broadband I777UCMD8 Build JZ054K.I777UCMD8 Kernal 3.0.31-1154545-user

To go into download mode I had to hold volume up and down and plug usb cable and it now was

product name SGH-I777
custom binary yes (3 counts)
current Samsung official

Power with volume up and down without SUB to get the android system recovery that shows <3e>

Do I need to install CWM or TWRP to install AJK v4.9 or do it via android system recovery?

 

[SteveMurphy]

Thanks. Ok - I downloaded I777UCMD8 Stock Binaries (Android 4.1.2 Jelly Bean) from the download repository and installed it. Splash screen says samsung and then goes to ATT globe and then starts. Error right away says gmail something not working - Wifi doesn't work - about device Model Samsung - SGH-I777 Android 4.1.2 Broadband I777UCMD8 Build JZ054K.I777UCMD8 Kernal 3.0.31-1154545-user

To go into download mode I had to hold volume up and down and plug usb cable and it now was

product name SGH-I777
custom binary yes (3 counts)
current Samsung official

Power with volume up and down without SUB to get the android system recovery that shows <3e>

Do I need to install CWM or TWRP to install AJK v4.9 or do it via android system recovery?

You need to use Mobile Odin or Flashify in order to install the custom kernel/recovery. You will not be able to flash the AJK kernel in stock recovery, so go to the Play Store and get one of those apps (both have a free version). You must be rooted first, so make sure you followed creepy's steps above.

Once you install AJK you'll have not only the kernel but also a custom recovery (CWM).

 

[kingrat]

You need to use Mobile Odin or Flashify in order to install the custom kernel/recovery. You will not be able to flash the AJK kernel in stock recovery, so go to the Play Store and get one of those apps (both have a free version). You must be rooted first, so make sure you followed creepy's steps above.

Once you install AJK you'll have not only the kernel but also a custom recovery (CWM).

Well I have superuser now - worked with no problems..

I installed Flashify it asked for superuser I said yes but when I select boot image it just hangs - I never get the option to select the image. I have uninstalled and reinstalled.

I have installed mobile odin but it needs internet access to add some odd-on APk and I dont have internet on this phone - BECAUSE WIFI wont work. I tried to download mobile odin add-on for flash but still doesnt give me that option. I looked and couldnt located the correct add-on for this phone to install firmware


mobile odin lilte is v4.20
Flashify is 1.9.2

Not sure what option I have

 

[SteveMurphy]

Well I have superuser now - worked with no problems..

I installed Flashify it asked for superuser I said yes but when I select boot image it just hangs - I never get the option to select the image. I have uninstalled and reinstalled.

I have installed mobile odin but it needs internet access to add some odd-on APk and I dont have internet on this phone - BECAUSE WIFI wont work. I tried to download mobile odin add-on for flash but still doesnt give me that option. I looked and couldnt located the correct add-on for this phone to install firmware


mobile odin lilte is v4.20
Flashify is 1.9.2

Not sure what option I have

Did you root using Framaroot as creepyncrawly suggested? Just installing SuperSU won't root your phone, so that's likely why you're having issues obtaining root. You must root first, then install SuperSU. Then you should then be able to use those apps that call upon root privileges.

 

[kingrat]

Did you root using Framaroot as creepyncrawly suggested? Just installing SuperSU won't root your phone, so that's likely why you're having issues obtaining root. You must root first, then install SuperSU. Then you should then be able to use those apps that call upon root privileges.

yes, I install framaroot version 14.1 exploit results Success but I installed superuser and not supserSU - I have installed superSU now

I reinstalled mobile odin lite and mobile odin flashkernal and still no luck - still says that I need additional add-ons for this phone..

Installed Flashify and I granted root access via supser SU

In the flash menu zip file I get to choose and for recovery image I get a choice but if I select boot image it locks up and does nothing then says flashify isn't responding do you want to close it..

I just want a clean rom without all the bloat and working WIFI

 

[kingrat]

So I installed the kernal via CWM following the instructions listed in for AJK v4.9

Kernal now says 3.10.0-R93.AJK_v4.9_NoSwap-root

So wifi still doesnt work - Buttons work now

How do I fix Wifi?

 

[creepyncrawly]

Was wifi working before you started this process, and you were able to use it? Because, after you flashed the UCMD8 stock, wifi should have been working, and you said it was not. That makes me think that you may have a hardware issue with the wifi.

 

[kingrat]

Was wifi working before you started this process, and you were able to use it? Because, after you flashed the UCMD8 stock, wifi should have been working, and you said it was not. That makes me think that you may have a hardware issue with the wifi.

On an old ROM the wifi was working - I used this for phone for almost two years until I went to my Note 2 then to a Note 3 and it sat in a drawer. It had SHOstock on it before but my brother was mucking around with it to install Cyanogen and after I started this process.

 

[creepyncrawly]

I'm still not clear when the wifi was working. Was it before it sat in a drawer, or recently when your brother tried to install Cyanogen?

In my experience, wifi has always worked after a fresh install of any official stock firmware, and definitely after a fresh install of UCMD8, unless there was a hardware issue. So if wifi is not working, I would try another fresh install of UCMD8, and if wifi is not working there, I would try a fresh install of another stock firmware, perhaps UCLE5 or UCLL6 (4.0.x), or even the original UCKH7 (2.3.4), all of which are available in the Download Repository. This should give you a definitive answer whether it is hardware or firmware.

 

[kingrat]

I'm still not clear when the wifi was working. Was it before it sat in a drawer, or recently when your brother tried to install Cyanogen?

In my experience, wifi has always worked after a fresh install of any official stock firmware, and definitely after a fresh install of UCMD8, unless there was a hardware issue. So if wifi is not working, I would try another fresh install of UCMD8, and if wifi is not working there, I would try a fresh install of another stock firmware, perhaps UCLE5 or UCLL6 (4.0.x), or even the original UCKH7 (2.3.4), all of which are available in the Download Repository. This should give you a definitive answer whether it is hardware or firmware.

It is strange to me as well - I will try that and let you know.