Each provider assign you a unique ip address for you..You can change the ip address in the Nokia E63 easily..You can reset the internet settings or connect again to internet .Your internet ip address will get changed in Nokia E63..But it will work if you using dynamic ip address.If you accessing wireless connection and it's a static ip address it will not change even if you reset the modem also...To check the ip address you can visit the site Ip-details.com