I know this is a heart teasing question to struggle for everyone. But still try to ask,

Suppose I accepted the offer from company C1 and doing all processes.

Then I got another offer in few days in one of the FAANG company C2, better project and x2 the package.

How do you deal with this case if it happens to you?

If I go accept the new offer from C2:

How immoral it is do you think?

Is there any legal issue for that, or I will loose some credit in some future background check?

Thanks,
I am anonymouse for this question. LOL