Hello there.

Been using my Stock S3 for sometimes and getting bored with it recently. With the delayed of 4.1.2 for Malaysia, I'm thinking of flashing custom rom for the first time.

The method I will be using will be flashing via CWM. There are few things I'm concerned.

1) Is flashing rom is like formatting OS for pc ? What will be the data (mostly apps) inside my int/ext storage?
2) Will flashing delete my settings and sms ?