Is everyone who's been having troubles connecting your Samsung Galaxy S3 phone to the PC also has a rooted phone? I have a hunch that it's rooting (i.e., a rooting method that's popular in these forums) that's causing the problem.
P.S. I did not have USB->PC connection problem until after I rooted my phone.
P.S. I did not have USB->PC connection problem until after I rooted my phone.
