Point of Sales (POS) plays a key part in the overall retail ecosystem ensuring smoother purchase of goods and services with the usage of credit/debit cards. With the advent of E-tail and e-commerce which have a significant component of services and goods delivered at home, mobile POS or mPOS devices are becoming a key to successful Cash on Delivery (CoD) Model. Square was an early pioneer in the mPOS systems which disrupted the market with its handy and portable credit card readers which could be hooked to the Audio port of an iPhone device. System involves capturing and reading the credit card information and transferring the data as encrypted audio waves to the phone. A secure app in the phone then transfers the data to the backend verification fulfilling the transaction. Where the legacy POS devices needed their own GPRS/3G connections, mPOS devices leverages Smart Phone’s connectivity to complete authentication and transaction. With the ubiquitous and affordable Androi...