Virtually everyone has a mobile phone these days and many people like to surf the internet on them as well. I for one have shopped online via my smartphone as it is so easy and very convenient. Sometimes I will sign up to receive information from the businesses I buy from and sometimes I will not, it depends on the business and whether I think I want to use them again. If it is just a one off purchase then I probably won’t bother. Having looked into sms marketing for my own business, I know it can be very effective as it only targets those who are really interested.