It was established by Digitel in September 2001 to provide wireless public and private telecommunications services.

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.

In 2011, PLDT acquired Digitel, including Sun Cellular, from JG Summit Holdings.

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.