It's very sad to hear that Nokia failed to realise, that phone users are not technical experts, but laymen.

With Nokia 6600, did Nokia actually thought that buyers will know Wap 2.0 or whether their Mobile operators support that? I guess customers are only like to know MMS, Mobile internet, like words.

It's a crime without properly advising the buyer to sell something, which cannot be used. Nokia should know that 90% of mobile operators don't have Wap version 2.0. In that case they should at least mention in the phone's packaging, that the phone will only work with Wap 2.0 and so may not work in all the mobile networks with MMS.