Since you are not passing the phone screens easily, I would suggest not to quit before your next offer is at hand. Easier to get the next job when you are alrea

Since you are not passing the phone screens easily, I would suggest not to quit before your next offer is at hand. Easier to get the next job when you are already employed. Meanwhile continue to save up money should you want to quit anyway. Search online for interview questions in your niche of interest. Questions like "reverse a string in place" are very common interview questions and you need to get comfortable with them. Be honest with your interviewers that you are looking for a change. You must somehow convince them that the work interests you and that you can pick it up.