UI change in order to improve user experience

Sharing some design decisions I took about Passei Direto Mobile.

At first, we were offering to users 3 options: Signup via Facebook, Signup via email and Login.

The Problem: users who already have an account were not finding where they should login, others users were clicking in "sign up via facebook" but they were finding an error (because they already had registered once)

Solution 1:

Change the behaviour of "sign up via facebook" to also allow login.

Solution 2:

1- Change the home screen buttons, giving the same size to all of them, but prioritising the login option.

2 - Change the text of facebook button to "enter via facebook" which suggest login or either sign-up and of course, allow these both actions.