Can i change to another employer ( find another job ) just after my i797 arrives


My H1b just got approved and i797 is arrived , im currently on H4 and hadnt done h1b stamping yet, but wanted to know if i can change my employer and find a new job as a starting job , because my current employer through which i filed H1 is having some issues dealing a client that was suppose to give the offer

I know once i have my h1b applied , i can do it for sure , but wanted to know if i can do it at stage of i797 being arrived.

any help ? would appreciate if someone with past experience or knowledge in domain can advise on this