As the leader in a country with four major operators, our focus has been on providing the highest quality mobile data experience to our customers and on expanding or HFC network.
In Mobile, we launched 4G in Q1, and it has been a success. Though the B2C subscriber base declined by 10.1%, we grew data users by 14.4% and GB per user by 63%. Most notably, we added 311,000 4G smartphone data users during the year.
In Home, our current focus on up-selling and cross-selling is working and drove HFC Revenue Generating Units (RGUs) up 4.1%, and ARPU 4.1% as well.
In B2B we have seen a surge in our small and medium-sized businesses (SMBs) customer base, making the Tigo brand an established partner to SMBs throughout El Salvador.
Overall, service revenue declined 0.6% but Mobile Data grew 20.1%, and we saw revenue growth accelerate throughout the year. EBITDA grew 4.5% year-over- year, and the margin expanded 180 basis points to 36.6% on good cost control.