if i cant contact the previous owners to remove activation lock is there any other way to remove activation lock?

No, not unless you were the original owner.

"Activation Lock for iPhone, iPad, and iPod touch" is a security feature, one aspect of which is deterring re-selling of stolen devices. To learn more click here --> http://support.apple.com/HT201365

An activation lock can only be removed using information for the account that applied the lock. If you know this information click on this link to learn 'How to remove Activation Lock' --> https://support.apple.com/HT201441

If you can't reach the previous owner whose ID is on the device and have them remove the device from their account, the device is worthless. Apple won't unlock it for you.

Turn off Activation Lock - Apple Support.      

I cnt cntct wth the previous owner he is out of country plz kndly help for for activation