How to Program Ringtone downloads from an ASP.NET site to Mobile Phones?

I would like to allow users to purchase and download ringtones from an ASP.NET(C#) website.  I am new to WAP/WML/SMS/MMS and am not sure how to proceed.  

Customers would be limited to U.S. and Canada.  When a user has purchased a ringtone, I plan to give them a link where they can enter their Mobile Server Provider, Phone Model, and Phone Number...  

1) What alternatives do I have to get the ringtone to the purchaser's phone and what are the pros and cons?

a) Should I send the ringtone in an SMS (or MMS) message?  
Would I be sending the ringtone file itself or the merely a download link?  
If I am sending the actual file, do I need to convert it to some other format?
Do I need a WAPsite in this scenario?

b) Should I send the link to a WAPsite in an SMS message where the phone user could select a download link?

2) How do I send an SMS (MMS) message?  
Is the purchaser's cell number and service provider all I need to build the address?
Do I need to subscribe to a 3rd party SMS gateway to actually send the messages?  Are these services expensive?  Would I be posting a 3rd party form or calling a webservice?  Would the 3rd party gateway provide the how to information?

3) What is entailed in setting up a WAPsite?  
I know they are coded with WML, but do I need any special server hardware or software?

4) How do I determine which service provider I can support?

I know this is a lot of questions, but I am hoping someone can set me on the right course with a set of steps or a how to guide.  

Thanks.


daversaceAsked:
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SnowFlakeCommented:
depending on your goal,
assuming you want to be a content provider and not a service provider
you might consider searching for a service provider partner.

search the web for "SMS Gateway ringtones" and you will find such sites as
http://www.truesenses.com/

as for your Qs I think most of them would be answered by reading the docs in sites such as the one above.
but to summarize:
If I am not mistaken, Ringtones are usually sent and not "downloaded".
the user surfs your site (which only needs to be WML if you want him to surf using his phone
- which I see no advantage in). when the user selects a ringtone (and provides you with the required info)
you pass it on to the SMS Gateway and the message is sent and the relevant charges are applied.

I would not be surprized if you can find (or rather I would be surprized if you couldn't find) a provider of a service
that will take care of everything and you will only need create the ringtones, bring the users and share the profits.

SnowFlake

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