Before anything else, note that you have content stolen from other places. This is against adsense tos, read the last blog post of "inside adsense" and you'll see it is talking about you.
Adsence placement within site is very good because its showing in search result if you copy the content from other site then give the source of site.
but i mentioned the sources exactly just like gsmarena.com and other website thats copy the content from another websites and post the source link ..
Yes, but have read the blog post I mentionned? Anyway, this method of copying content from other sites is doomed to fail, so why are you wasting your time like this? I tell you, for adsense you need A LOT of traffic, and this way of copying you will never get the necessary amount of traffic needed, so why are you doing this? Why waste your time?
The sidebar Google ad should match the width of the other ad if you are going to have them placed the way you have them. It looks unbalanced the way it is. Another Link Unit or a button ad might work better for you there if you intend to keep the lower skycraper ad. The way you have it now is unbalanced and disturbs the eye when it looks at your page. I would also work on site design to make it more attractive to visitors.