System Software Version 3.30

I have system software 3.30 how do i change it to custom ?

Wrong section and you cant downgrade firmware 3.30. All you can do is wait for a downgrader.

ok i will

I think this is the right approach, because everyone should mind their own business. If I need such services, then I always turn to a reliable development company whose specialists know how to develop a quality product. In fact, they can also help you solve some minor software problems, so don't wait too long and just ask the competent developers for help.

Thank you for the helpful information.