Samsung Galaxy S GTI-9003 spontaneously reboots My Samsung Galaxy S GTI-9003 spontaneously reboots itself with different time intervals. The boot cycle does not complete and freezes at Samsung Logo.

When I take off the battery and switch it back on, all the data is gone, the phone is literally formatted.

I have tried several options like factory reset, changed the sim card, removed memory card but nothing is working.

Appreciate help from Enthusiasts
Are you familiar with adb tools from the Android SDK? What you'll need is logging from your device as a starting point.

The easy way

There are tools available (apk's) that can be installed from the Google Play store to read out the logcat. The 2 first hits on Google play look useful:

https://play.google.com/store/apps/details?id=org.jtb.alogcat

https://play.google.com/store/apps/details?id=com.nolanlawson.logcat

However this logcat is usually cleared on each reboot so that might not be your best option.

The better way

More information will be retrieved using command line tools like adb from the google Android SDK. 

A quick step by step guide


Download Android SDK from http://developer.android.com/sdk/index.html (If you're not planning to develop go for the "Download for other platforms" > "SDK Tools Only" option on that page)
Follow the installation instructions (download, extract)
Have your android device connected to your computer using an USB cable (check if drivers are needed for your environment)
Navigate to the platform-tools folder and execute the adb command with the following arguments:

adb bugreport > bugreport.txt


That should create a bugreport.txt file within you current directory. Post that information here (check for personal information first though).

For more information about the adb tools check http://developer.android.com/tools/help/adb.html