The definition of a mobile payment is often open to interpretation and can differ from source to source.    Juniper Research has a simple definition of a mobile payment as “payment for goods or services with a mobile device such as a phone, Personal Digital Assistant (PDA), or other such device.”   As is the case with other, older, payment schemes like cash, the current mobile payment market does not have a single, definitive, payment method and there  is substantial variation between what particular scheme is adopted from region to region. Mobile payment schemes vary from the remote methods, such as PRSMS (Premium Rate SMS) schemes for paying for digital content dominating in Europe, to the physical, whereby, in regions such as the Far East & China, users take their mobile phone to the physical storefront to pay for goods via contactless credit/debit card schemes.   There are many different and often competing categories of mobile payments currently available.