I doubt this will make much money from parking or resale.
If you have some time, the best thing that you could do IMO is as follows:
Set up affiliate links with as many phone operators as possible
Set up pages for different countries with an entry page with flags on it for people to chose.
Brand the page with your own logo
Consider adding some 'stickiness' with review software for people to talk about phones, or a newsfeed about the latest phones.
Build PR and backlinks by getting the site on blogs, search engines and linked on other phone sites.
Wait for some traffic and tweak the site where necessary. Even if not generating income, some good traffic will make a domain sale much easier in the future.