This is the original post from XDA on how to enable unknown resources without the OTA update. This has been tested and confirmed to work on the Aria
~Information~
The following are instructions that I have come up with to unlock the "Unknown Sources" option on non rooted Android phones that do not have the option available. By unlocking this option you will now have the ability to install non "Android Market" applications such as "TeamViewer" and more
~Warning~
This was performed in a HTC Inspire 4G so results may vary for each phone
[COLOR="Red"]THIS PROCESS WILL RESET YOUR CONFIGURED SETTINGS TO THE DEFAULT (Display, Ringtone, Wallpaper, etc.) [/COLOR]BUT DO NOT WORRY BECAUSE IT ISN'T PERMANENT. ALL YOU HAVE TO DO IS RECONFIGURE IT AND ITS WORTH IT IF YOU ARE UNLOCKING THE OPTION "Unknown Sources"
1. Go To Your "Settings"
2. Go To "Applications"
3. Go To "Manage applications"
4. Go To The "All" Tab (or any tab that will display all your apps)
5. Find The Applications "Customization Settings Provider"
6. Click On "Clear data"
7. Go Back To "All" Tab (or any tab that will display all your applications)
8. Find The Program "Settings"
9. Click On "Clear data"
Finished
If You Go Back To "Applications" You Will Now Have The Option To Enable "Unknown Sources"
If It Worked For You Please Submit "Yes" in the poll. If it didn't please submit "No" in the poll. I would also be glad if you submitted a reply to the thread to keep it alive.
~Troubleshooting~
Q. I Can't Change My Wallpaper!
A. Restart Your Phone (Not Shutdown) And You Should Be Able To Change It Now.
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