Basically, there are two ways to provide OTA configuration.
1. Nokia WAP Servers have an OTA provisioning feature. For further information, please take a look at:
-> Connect to Mobile Services
2. Nokia has an Over The Air (OTA) Settings Specification, Version 6.5 in Forum Nokia web site/Smart Messaging section/Documents. This document specifies how to provide mobile phones with browser settings and bookmarks over the air.
In addition there are also some commercial applications available for this purpose.