Once the Saved Logged hit some certain levels, It tells on the Phone and then it begins to Slow down the RAM of the Phone, The Simple Solution is to clear the Event Log Register and Free your Phone from any unneccessary behaviour.
FOLLOW THIS STEPS TO CLEAR YOUR PHONE EVENT LOG
1. Hold down the ALT key and press LGLG (the letters) while on your Home screen.
2. You will have to wait a bit while your Phone loads, You will see your event logs.
3. Now, Click the Blackberry menu button and select “clear log” this will clear your Phone Log and keeps your phone working 100% faster!