Excise duty and cenvat

Dear Experts,

I am a small importer. I got IEC by mentioning trader in the form while applying. My yearly import is between 50 k to 7 lakhs.

Last financial years it was just 1 lakh. We import mobile accessories like screen guards and covers. 

Am i suppose to pay CENVAT? Am i liable for it ? I pay CVD so i am exempted from VAT. And what all I have to do after I import.

Thanks

Jay