Digitel Mobile Philippines, Inc., doing business as Sun Cellular (or simply known as Sun), was a wholly owned subsidiary of Digital Telecommunications Philippines (Digitel), which in turn was owned by PLDT and is one of the Philippines’ largest mobile telecommunications companies. It was established by Digitel in September 2001 to provide wireless public and private telecommunications services. Sun Cellular was known for introducing unlimited call and text services in the Philippines. History Early History On August 7, 2000, Digitel was granted a permit by the NTC to establish and operate a Nationwide Cellular Mobile Telephone System (CMTS) using Global System for Mobile Communications (GSM) and/or Code Division Multiple Access (CDMA) technology. The following month, the company founded the Digitel Mobile Philippines, Inc. (DMPI) to assist in its wireless service. On December 11, 2002, the government granted DMPI, through Republic Act No. 9180, the right to establish a permanent franchise to create and manage a wireless telecommunications service. DMPI launched its wireless service, known as Sun Cellular, on March 3, 2003. From mobile telephony, Sun Cellular expanded its services to voice, messaging and international roaming services, to wireless broadband and value-added services for consumers and businesses. Acquisition by PLDT In 2011, PLDT acquired Digitel, including Sun Cellular, from JG Summit Holdings. Although PLDT also owns Sun's former competitor Smart Communications, the two networks initially remained separate entities with completely independent mobile network infrastructure and corporate management structures. Transition to Smart (2016-2022) Since 2016, Sun has been integrated into the Smart network in terms of mobile network infrastructure and corporate management and has been transitioned into a Smart brand (vis-a-vis TNT). Aside from the migration of all Sun data users to its new parent by way of them having to change their Internet settings, postpaid subscribers have been migrated to Smart "in order to efficiently handle their needs following access of Sun customers to Smart’s ‘nationwidest’ network." As of February 2020, Sun's logo has been changed to reflect it being a full-blown brand of Smart (i.e. "Powered by SMART"). On October 21, 2020, PLDT announced that Sun's prepaid service was integrated into Smart Prepaid, leaving its postpaid service under "Sun" branding. On April 25, 2022, Sun's postpaid service was merged with Smart Postpaid, resulting to the subsequent forced retirement of all Sun Postpaid plans and add-ons. Smart encouraged those planning to subscribe to Sun to instead take advantage of Smart Signature plans,