Mobile marketing is multi-channel online marketing technique focused at reaching a specific audience on their smart phone, tablets, or any other related devices through websites, E mail, SMS and MMS, social media or mobile applications. Mobile marketing can provide customers with time and location sensitive, personalized information that promotes goods, services and ideas. In a more theoretical manner, academic Andreas Kaplan defines mobile marketing as "any marketing activity conducted through a ubiquitous network to which consumers are constantly connected using a personal mobile device".
You will have a greater chance of gaining access to their mobile number by following these guidelines. You can collect their numbers using a sign-up sheet at your register, asking them when talking on the phone, allowing them to submit a form on your website, or by giving them a number that they can text to subscribe to your SMS messages. Whatever you do, keep a copy of their permission to market to them via SMS, if you run into problems you will be glad you did.