If you are looking to add something to every cell phone you need to think through what is the value for the gatekeeper (OEM or Carrier) Typically the OEM (HTC, Samsung) or the carrier (Sprint, Verizon) will have to be pursued to add the application / link and either wants upfront payment to do so or back end dollars from conversion. I spent many years working on getting mobile applications onto devices both at the OEM level as well as within a retail environment from within a fortune 100 retailer. Its is not just about having a great idea but making the idea appealing to all parties involved - OEM, Carrier, Retailer end user.