Japan’s leading mobile operator by subscribers NTT DOCOMO has revealed plans to cut the service charges of a basic cellular phone plan by 30%, as it redoubles its efforts to retain subscribers. The cellco, which has some 25 million users on a non-smartphone-based plan, is set to introduce a package costing JPY1,500 (USD14.6) or less per month, highlighting that customers will have unlimited calls of up to five minutes per call. The Nikkei notes that customers who buy a new handset compatible with its 4G LTE data services and VoLTE voice calls will still be able to sign up for this new plan. DOCOMO’s new voice calls-only plan is roughly JPY700 below comparable deals offered by rivals KDDI (au) and Softbank Mobile. Moreover, DOCOMO claims its data-inclusive package will also undercut the competition, suggesting that a subscriber with low usage will typically spend less than JPY2,000 per month.