I have edited the post, and retitled the thread in hopes to further attract users with the same issue or perhaps a solution.
In the mean time, I have a few questions to define the question so that we may be able to better find a solution.
1. Is your device the Bell LG Optimus 4G LTE?
2. Is this update you speak of the Android 4.0 update?
3. If so, when did you accept the update?
4. By "everything on your phone," do you mean user data? Ie, pictures, contacts, etc?
5. Were you prompted to reenter your Google Gmail credentials upon restart?
Defining your question, posting in the appropriate forum, and using keywords in the title can often help draw users who may be able to help you.
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