If you are experiencing LAG and unresponsive screen just follow this instructions:
*Things you should do first.
1. Remove the Sim card and Memory card.
2. Your unit should have fully charge battery.
*Procedure in updating the phone.
1. Turn- on your S3653 W
2. Touch the keypad
3. Enter *#2665#
4. touch the 1
5. Wait for few minutes
Note: This procedure is for S3653W only.