Hi!;)

1. Do you think 50€ difference between the SE k530i (99€) and the SE w660i (150€) is worth?
You can check the differences here

2. Which mobile can be more easily 'sim unlocked' ?

3. In the unlock procedure can i de-brand in order to remove those horrible wallpapers and others from the mobile?

4. If so, can you please tell me how?

5. In any case can I need can i lock it back to the carrier? as it was in the beginning?

Thanks, would appreciate any help ;)
My Regards