Read some tips on interview routine questions over the internet
Just bring yourself. Call centers don't care what you look, they look more into how you talk or type.
There interviewers are not good
This is my first BPO experience so I searched about customer service, the nature of BPO industry and also searched the common questions for a call center interview.
Eat well and come in early to finish early.
Just be yourself. Relax and answer the question direct to the point.