Wikipedia Zero proposed features

Web portal for partner management of Wikipedia Zero settings.
Having a web portal for each carrier allows each carrier to manage their own settings, such as Zero-rated IP ranges, customized banners, and other options. This allows the carrier to manage their own configuration, and minimizes bottlenecks and errors of transcribing email requests from partners.

Per-Carrier override of data-charge warning when carrier banner hyperlink selected.
Some carriers do not charge their customers to use the home page. These carriers do not want a warning presented which may create doubt in the users mind about whether the carriers home page is actually free.

Per-Carrier testing based on cookie activation.
Right now, all of our testing involves enabling the Wikipedia Zero banners for the carriers IP range. Most carriers do not have an IP range they dedicate to internal testing, so any tests we conduct are prescheduled for a couple of hours during the evening. The problem is that customers are also participating in that test prior to the launch of the service. Since most customers do not want to be involuntary beta testers, we are looking at alternate means to provide functionality to only a subset of the users. Enabling this functionality via a preloaded cookie will give the carrier the ability to test the system on their network without impacting actual customers.

Per-Carrier configuration of marketing banner close button availability.
For marketing purposes, many carriers would like to have their marketing banner appear above the free wikipedia pages most of the time. However, this banner also impacts usability of the site on mobile devices with limited screen space. To balance these conflicting interests, the banner contains a close box which causes the banner to disappear for a period of time, currently a day. Please note that the option to keep banners shown is only available for the zero.wikipedia.org URL. Even if the carrier has made m.wikipedia.org available for free, users will always have the option to turn those banners off. This is important for people who want an option to use Wikipedia without banners most of the time.

Smarter landing page for complex font based languages.
A carrier may support zero-rating languages that are difficult to render, such as languages that use Indic fonts. Until quite recently, most phones have not been able to render complex fonts, and that means that most customers would not be able to read these language options listed on the landing page (unless they had at least an iOS 4.0 or Android ICS device). So to avoid this problem, we are investigating ways to detect if the phone is able to render complex fonts or not. If we detect that the phone cannot display these languages, then the landing page would not list them on that phone.

Make zero.wikipedia.org present an error message if not in a known carrier IP range.
We expect to have customers who hear about Wikipedia Zero and try it out to tell their friends about it. However, if someone hears about this service from a friend, and they are using a carrier who is not on the Wikipedia Zero program, they would end up receiving unexpected data charges from using zero.wikipedia.org. So to prevent confusion, the zero.wikipedia.org URL should present a friendly error message to people attempting to use this URL from an IP that is not part of a participating Wikipedia Zero partner.