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How to Install/Remove System Apps on Android [MUST HAVE ROOT]

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By curiousandroid, Junior Member on 4th February 2011, 07:28 PM
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########## IMPORTANT UPDATE ##########

There is an APP available that makes this much simpler

* No Console Commands Needed

* You still MUST HAVE ROOT

* It must be installed on internal memory to work correctly

* Be sure you know what a system app does before you remove it.

* If you remove a vital app you could mess up your system completely.

The APP is Called: "System APP Remover"

Here's a Link to Download it: http://www.megaupload.com/?d=ZFC2C1R7
Mirror Download Link: http://www.mediafire.com/?h3n3ftbwilshcvn

######################################


Here are the console commands for installing/removing system apps in android console emulator, very easy ; )

You must have ROOT and console emulator, I found this very helpful, so I hope it helps others as well...
__________________________________________________ ___________________________________
Install App to System:

Place APK file in the root folder on your sd card.

Open terminal and enter these commands:

# su
# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
# cat /sdcard/filename.apk > /system/app/filename.apk
# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
# reboot
__________________________________________________ ___________________________________
Remove App from System (Be careful what you remove):

# mount -o remount,rw /system
# rm /system/app/Filename.apk

[Optional, to make read-only again]
# mount -o remount,r /system

[When Finished]
# reboot

__________________________________________________ ___________________________________
****KEY****
"#" means root command will follow
[Notes are in these brackets and aren't commands]

- ENJOY

ALSO...

**** I'm new to Android APP creation, but if anyone can automate this script to make a simple One-Click GUI APP that would be awesome, all I ask is that you put my name in the co-dev/"Thanks to" list for the app, just so I can say I helped ;) ****

- CuriousAndroid
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5th February 2011, 11:21 PM |#2  
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I am trying to reinstall some files I uninstalled. I went to the following link on this site and found some apps that people said could be removed - http://forum.xda-developers.com/showthread.php?t=773142

however, my Act1 video player now quits whenever I receive an incoming text, so I need to reinstall some programs and see which one is causing the problem

I downloaded an app called Android Terminal Emulator by Jack Palevich. I tried a "reboot" command (without the #) but it said reboot operation not permitted. Is this the Emulator I need to reinstall files? Am I doing something wrong?

--------------

EDITED:

ok nevermind, i realized the "su" command gives superuser access needed for the reboot....going to try to install files now
6th February 2011, 02:19 AM |#3  
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yeah, to use any root commands "su" must be used first otherwise the shell will think your just some generic user with limited privileges and nothing will work.

It's very important to identify any apps you plan on removing before you attempt it to make sure it isn't needed by another process.

You got lucky, some apps once removed can cause the whole rom to fail, so be careful!


- CuriousAndroid
6th February 2011, 06:43 AM |#4  
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well i think i messed something up...is there a way to recover back to stock after using the sdx stock app remover? i removed the video player but tried reinstalling it...when i uninstalled it from sdx, i noticed my other video player (Act1) would quit whenever i'd get an incoming text

i have all the .apks backed up, but after attempting to reinstall the stock video player, it hangs in MyFiles...then i reset back to factory (no Act1), and it can't play my videos, i get the error "No applications can perform this action"

Is there a way to recovery back to stock with all applications installed and in tact? i have all the .apks, but this video player won't work, after following your instructions above

thanks
7th February 2011, 02:32 AM |#5  
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It will work. Check the following:

* All shell commands are CASE-sensitive, so if the app is called Vending.apk you can't type vending.apk

* for the command to work you must have the apk on the root of your SDcard, not in sub-directories.

* if you have a copy of the rom you installed you can unzip it on your PC and find the system app folder, which you can use to cross-refference with the system/app folder on your phone to see if your missing something else.

in terminal you can list system apps like this:

# su
# cd /system/app/
# ls | more

[that will allow you hit space bar to navigate through app list if it's longer than a page,press ESC when done to go back to prompt]

* If all else fails you can backup your settings to your sd card and re-install your rom (as a last resort)

-Good Luck
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1st March 2011, 12:55 PM |#6  
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Quote:
Originally Posted by curiousandroid

Install App to System:

Place APK file in the root folder on your sd card.

Open terminal and enter these commands:

# su
# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
# cat /sdcard/filename.apk > /system/app/filename.apk
# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
# reboot
__________________________________________________ ___________________________________
Remove App from System (Be careful what you remove):

# mount -o remount,rw /system
# rm /system/app/Filename.apk

[Optional, to make read-only again]
# mount -o remount,r /system

[When Finished]
# reboot

__________________________________________________ ___________________________________
****KEY****
"#" means root command will follow
[Notes are in these brackets and aren't commands]

- ENJOY

ALSO...

**** I'm new to Android APP creation, but if anyone can automate this script to make a simple One-Click GUI APP that would be awesome, all I ask is that you put my name in the co-dev/"Thanks to" list for the app, just so I can say I helped ;) ****

- CuriousAndroid

When I am doing the first part here of installing app to system I dont just simply do that first I can already have an app ready to go that I want to move to sd card right? I am just making sure I didnt have to do that simply first before I even start moving the apps. This site has be great and thanks for everybody help. Wish I would have known have this site way back when.
2nd March 2011, 05:54 PM |#7  
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What is "yaffs2" standing for? I type "yaffs" instead of "yaffs2". What has this done to my system? Do I have to expect any "side-effects"?
When I call # ls | more to list the directories content, the apk is listed but it is not installed yet. Is there anything else i have to do?
3rd March 2011, 11:12 AM |#8  
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yaffs is nand flash filesystem
yaffs2 is more elaborate updated version
yaff2 has greater support
so if your device isnt supported by yaffs1, it may not work.
it's best to follow the commands as they're written.

apps still appear as apks in system/apps folder after installation.
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20th April 2011, 04:00 AM |#9  
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Haha thats funny!! I downloaded this app.. put it on my sdcard.. installed it and when i tried to open it it said " Shame on you for trying to pirate a 1.00 app "
25th April 2011, 09:51 AM |#10  
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If you have Applanet just go there and look for Systemapp Remover - it's a bit older version but seems to do the job.
25th April 2011, 04:07 PM |#11  
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By mistake my contacts.apk is removed. Above trick also not worked. my phone is LG GT540. Pl suggest any other way.
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