Hello ! I will change Service provider for internet company soon , that mean my "IP" and " DNS" will change - Will i have any problem in my account if i change my Service provider and enter my account with the new ip ?
No you will not have any problem because you are allowed to access your AdSense account through different IP's. You just aren't allowed to have multiple Adsense accounts. You'll be fine. A lot of people have dynamic IP Addresses which means when their modem or router connects to the internet, they get a different address... this is fine.