 
 <prompt> Wetin be di short name of di phone carrier group? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The cellular phone carrier group Open Mobile Terminal Platform (OMTP) for 2007 don endorse micro-USB as di standard connector for data and power on top mobile devices. For 22 October 2009, di International Telecommunication Union (ITU) sef talk say dem don accept micro-USB as di Universal Charging Solution for dia "energy-efficient one-charger-fits-all new mobile phone solution," and add say: "Based on di Micro-USB interface, UCS chargers also include a 4-star or higher efficiency rating—​​up to three times more energy-efficient than an unrated charger." 