Alex Sinaga
Analyst · Citigroup
Thank you, Andi. Good afternoon, ladies and gentlemen. Welcome to our conference call for the first quarter 2015 result ended March 31, 2015. We sincerely appreciate your participation in this call. Until end of the first quarter of 2015, we continue our excellent performance, both in term of operational and financial results. I would also like to update you on the progress of our cellular and fixed line business as well as our other business portfolio.
Ladies and gentlemen, let me start the overview by sharing the highlight of our first quarter of 2015 result. Telkom first quarter of 2015 consolidated revenue grew by 11.1% year-on-year with EBITDA and net income grew by 13.9% and 6.4% year-on-year, respectively, while our cellular subsidiary, Telkomsel, revenue grew by 12.1%, EBITDA by 9% and net income by 11.3% year-on-year.
Data, Internet and IT service, excluded SMS, recorded the highest revenue growth with 27.6% increase from first quarter last year. Telkomsel digital business grew by 57.4% as data traffic jumped 110%, supported by 3G- and 4G-capable devices, which grew by 55.2% to 43.7 million. Telkomsel expand its 4G LTE service in several key cities, including Jakarta, Bali, Bandung, Surabaya and Medan.
Ladies and gentlemen, our strong result in first quarter of 2015 was in line with solid performance of our cellular business. And in term of operational aspect, Telkomsel gained 877,000 net additional customer during first quarter of 2015, grow total customer base to 141.5 million amidst relatively high SIM card penetration. Mobile data payload jumped significantly to 89.6 terabytes or increased 109.8%, mainly supported by fast-growing 3G- and 4G-capable devices adoption, which grew by 55.2% to 43.7 million users.
Telkomsel continue expanding its network infrastructure by adding 5,132 new BTSs during first quarter of 2015, which around 89% 3G and 4G BTSs, including 6,674 -- I'll repeat it, 667 4G BTSs, and it is reflecting our focus on that business. In the meantime, our fixed line subscribers increased to 9.8 million or 9.4 million, while fixed broadband users increased by 11.4 million year-on-year to 3.5 million, supported by our newly launched IndiHome triple play.
Ladies and gentlemen, our excellent operational achievement has resulted in strong financial performance. Consolidated revenue grew by 11.1% year-on-year, mainly supported by our cellular subsidiary with around 60% contribution. We successfully maintained healthy level of profitability with EBITDA margin of 52.3%, improved from 51.4% in the first quarter last year, while net income margin was recorded at 16.2%, slightly lower than 16.9% in first quarter last year, but we attribute to the accelerate depreciation for our fixed wireless business.
On the expense side, it increased by 12.8% to IDR 16.2 trillion. Operating and maintenance expense grew by 20.2%, in line with the acceleration of network deployment, both in our cellular and fixed line businesses, in particular, to support digital businesses. However, we are disciplined to manage the added expenses, including personnel, general and administrative and marketing expenses, which grew by 0.7%, 3.6% and 1.1%, respectively. In the meantime, depreciation and amortization increased by 29.1% to IDR 5.1 trillion, in line with additional asset as a result of accelerated network deployment as well as accelerated depreciation for our fixed wireless business.
Ladies and gentlemen, for the first quarter of 2015, our cellular subsidiary, Telkomsel, continue its strong result as revenues, EBITDA and net income grew by 12.1%, 9% and 11.3% year-on-year, respectively. Digital businesses remained the growth driver with 57.4% increase year-on-year. And as a result, its contribution to total revenue increased significantly to 27% from 22% in the first quarter last year.
On the other hand, Telkomsel successfully maintained its legacy business as voice grew by 7.9% year-on-year and SMS grew by 5.1% year-on-year. This is again the result of cluster-based pricing strategy, coupled with market segmentation and stable competition environment. During first quarter 2015, we continue our effort of building our digital businesses' infrastructure to maintain our leading position in term of coverage, capacity and also capability.
By end of March 2015, BTS have now totaled to 90,552 units, grew by 21.8% year-on-year, of which 48.1% are 3G and 4G BTSs. Data traffic jumped 109.8% to 89.6 terabytes in the first quarter, mainly fueled by fast-growing smartphone, which increased by 55.2% year-on-year to 43.7 million users. Following 4G LTE commercial loans in Jakarta and Bali on December 2014, we continue rolling out 4G LTE network and service. And until April, we have expand to Bandung, Surabaya and Medan.
Today, we have closed 2,000 4G LTE BTSs serving those 5 cities. Until end of March, we successfully migrated 1.3 million Flexi subscribers to Telkomsel, and we put a lot of effort to complete the migration process earlier than expected, schedule of December 2015. The sooner of the migration could be completed, the sooner the frequency could be utilized by Telkomsel.
Ladies and gentlemen, a notable progress of Indonesia Digital Network for the first quarter 2015 that I could share with you is, in February 2015, we have connected our nationwide fiber-based backbone network from Aceh until Papua as we completed Sulawesi Maluku Papua Cable System, we call it SMPCS, until Jayapura City. Furthermore, we will put more effort to strengthen our access network to support the development of IndiHome triple play. Until March 2015, we have 245,000 IndiHome triple play subscribers, and we expect to have aggressive additional subscriber until the end of the year.
Let me now share the update of our tower company share swap transaction with Tower Bersama infrastructure. And until now, we still carry on the transaction process based on conditional share exchange agreement that we signed in October 2014, which is still valid until June 2015. And we can assure that the transaction process complies to the all required rules and regulations, and Telkom management's obligation is to follow the accountable and transparent process and make all the commendation according to the various governments.
Ladies and gentlemen, let me reiterate guidance for 2015 as up. We focus on 3 main programs for 2015: First is to maintain Telkomsel double-digit growth. Second is to drive digital business through Indonesia Digital Network 2015. And third is to stretch and expand international business by strengthening current international footprint and seeking new opportunities. We expect both Telkom and Telkomsel's revenue to grow in line with or slightly better than market by continue effort to grow digital business revenue. Our growth will be on the back of strengthened mobile business and rejuvenate fixed line business.
For EBITDA and net income margin, we expect to slightly decline both for Telkom and Telkomsel, in line with continued broadband infrastructure development in mobile and fixed line businesses. Our consolidated capital expenditure spending for 2015 is expected at around 25% of revenue with 60% to 65% of CapEx will be allocated for mobile-related business, around 20% to 25% for fixed broadband-related business, and the remaining will be for other businesses.
Finally, in term of M&A aspiration, our inorganic growth initiative help to enhance and increase digital business portion of Telkom Group with guidelines of 80/20 rules, where 80% is representing digital or new wave portions of inorganic programs. To support financing for our capital expenditure and M&A, we are currently in progress of issuing local IDR bonds with first tranche value of up to IDR 7 trillion, and the bond issuance is expected to be completed by the end of June 2015.
That's ending of my remarks. Ladies and gentlemen, thank you.