I am planning to submit my review paper in scopus indexd journal. Which unpaid Scopus journal will take less time . My research paper is on Role of watermarking in WSN.
Sanjay - my answer is a 'general' one - not knowing your discipline field. The only way that you can 'guess' as to shorter waiting times is if your target journals identify 'average' turnaround times - for review and/or copy-editing process if accepted. Even then - these are just a guide and can vary significantly. There is no way of knowing if a reviewer will take the maximum time (or more) - and then there is usually the 'inevitable' changes that have to be made and if the resubmitted manuscript then has to be reviewed again.
In my view it totally depends upon the reviewer your paper has gone to. Some take very less time and some takes ages. My few papers took a year for first review in journal which claim they given review in two months. It is totally a luck factor. But still you can see average time on website