Android 4 trouble

[ottgrims]

I have upgraded my Samsung Galaxy 2 to Android 4.0.3.

Now the battery just last less than 12 hours and the telephone gets warm with the same program use as before.

I have trouble using bluetooth to a Nokia handsfree in my car. It worked perfectly before I upgraded.

Is these known problems? Does anyone have a solution? Is it possible to downgrade to previous Android version?

Ottgrims

 

[FLUSAboy]

I have upgraded my Galaxy note to Android 4.0.3 and now I get the following notifications: "Sign in failed" and "sending failed"
The phone is no longer receiving my GMail.
What am I missing?
Thanks