Good afternoon, ladies and gentlemen. Welcome to Chunghwa Telecom conference call for the company's Second Quarter 2022 Operating Results. During the presentation, all lines will be on listen-only mode. When the briefing is finished, the reference for submitting your questions will be given in the question and answer session. For information, this conference call is now being broadcasted live over the Internet. Webcast replay will be available within an hour after the conference is finished. Please visit CHT IR website www.cht.com.tw/ir under the IR calendar section. Now I'd like to turn it over to Ms. Angela Tsai, Director of Investor Relations. Ms. Tsai, please go ahead.
Thank you. This is Angela Tsai, Director of Investor Relations for Chunghwa Telecom. Welcome to our second quarter 2022 results conference call. Joining me on the call today are Shui-Yi "Harrison" Kuo, our President, and Vin cent Chen, our Chief Financial Officer. During today's call, management will begin by providing an overview of our business in the second quarter, followed by a discussion on segment performance and the financial highlights. After, we'll move on to the question and answer portion of the call. I'd like to give notice to our safe harbor statement. Now, I will turn the call over to President Kuo. Please go ahead, President Kuo.
Thank you, Angela, and hello, everyone. Welcome to our second quarter results conference call. I will now provide an update on our robust performance in the second quarter. Let's begin on slide four for an overview of our mobile business. In the second quarter, Taiwan mobile market continued its momentum as the three major operators focus on 5G migration, which benefits mobile service revenue growth. Market consolidation will be fulfilled in the near future, and we remain positive to the results as it will help the market maintain steady and profitable. Under this landscape, we were pleased to report our market shares in both revenues and the subscriber number continued to increase year-over-year, reaching 39% and 36.2%, respectively. We are confident that we will continue our market leadership going forward.
Our market leading position is backed by our 5G network deployment that has advanced and stay ahead of our peers. Speedtest awarded us the fastest 5G operator in Taiwan for the first and the second quarter of 2022, recognizing our leadership of 5G coverage and quality, as well as the Speedtest Awards for five years in a row to affirm our comprehensive mobile network as number one in Taiwan. Slide five presents the leading achievement of our mobile business. In the second quarter, total mobile service revenue increased by 6.1% year-over-year, attributable to growing subscriber number and the 5G contribution, as well as an increase in text messaging usages due to COVID-19 related projects.
In addition, as many countries relax their border restrictions for global business travelers and tourists, we were glad to see the international roaming revenue begin to pick up in the second quarter. As for our mobile subscriber numbers, excluding IoT SIMs, there is a 0.7% year-over-year increase. In addition, our post-paid ARPU growth rate reached 4% year-over-year, maintaining its upward trend for five consecutive quarters. Meanwhile, we observed an average 37% uplift in monthly fees attributable to consumers who migrate from 4G to 5G. Taken together, we outperformed our peers in terms of year-over-year change in the number of post-paid subscribers, mobile service revenue and ARPU, suggesting that we remain the customers' first choice of telecom service provider in Taiwan in spite of industry consolidation.
Moving on to slide six, we may find an overview of our fixed broadband business. In the second quarter, our fixed broadband business continued its upward trend for 11 consecutive quarters. While subscriber numbers kept stable, fixed broadband revenue and ARPU both achieved a year-over-year increase of 4% and 3% respectively, benefiting from digital opportunities in the new normal. Notably, our subscriber number for services of 300 Mbps or higher maintain its high growth rate of 37% year-over-year. To respond to customers' demand in a more aggressive manner for higher speed demand in the wake of digital lifestyle, including increasing video conferences, and online learning, as well as internet celebrity economy.
We roll out a promotion package to incentivize high-speed service adoption of 300 Mbps and 500 Mbps and above. We are excited to see over 70% of package adopters choose 500 Mbps service and above, reflecting the success of our strategy of enhancing up-sales through speed up, upgrade. In view of the opportunity of the promotion package, we anticipate further growth of our ARPU and the market share. Now, let's move on to the performance of our customer-centric business groups. Slide eight presents revenue of our Consumer Business Group, or CBG. Consumer Business Group revenue in the second quarter increased by 3.3% year-over-year, reflecting our success in satisfying customer needs during the quarter.
Mobile service revenue for the Consumer Business Group grew by 5.3% year-over-year, mainly due to increase in post-paid subscriber numbers and the 5G migration. In addition, fixed- line service revenue increased by 1.0% year-over-year, attributable to digital opportunities under the new normal, including work from home, gaming and video services, among others. In the second quarter, we saw that Taiwan's Professional Baseball League games and the internet celebrity shows were especially well received on MOD and Hami Video. Sales revenue increased by 2.1% year-over-year, despite the handset supply chain disruption issues under COVID-19 and the typical seasonality ahead of the new iPhone launch. Slide nine further illustrates our Consumer Business Group highlights. In the second quarter, we continue encouraging subscribers to adopt our mobile fixed broadband and Wi-Fi services, all together.
The well-received promotion program reported a 13.2% quarter-over-quarter growth. In particular, our home Wi-Fi device subscription number doubled on a year-over-year basis, boosting our subscription-based revenue and the popularity of home-centric applications. In regard to our video business, we are delighted to re-report subscriber numbers of MOD plus Hami Video, which are paid in monthly fee on year, yearly basis. Rather than one-time sign-ups, increased by 6.6% year-over-year, mainly due to the Hami Video sign-up growth driven by drama offerings and the international badminton games. In the second quarter, we also announced our investment in local dramas and movies to extend the video business, as we plan to continue our content investment strategy to further enhance subscriber stickiness.
Stepping into second half, we remain confident about our video service performance as many popular sports events are expected to take place, particularly the FIFA World Cup coming up in the fourth quarter, for which we obtained exclusive broadcasting rights. Please turn to slide 10 for an overview of our Enterprise Business Group performance. In the second quarter, Enterprise Business Group revenue increased by 9.4% year-over-year, mainly due to the increase in number of projects completed, particularly the large smart energy project of solar farms and electrical enhancement. Our enterprise ICT business revenue increased by 31.7% year-over-year. Meanwhile, enterprise mobile service revenue continued to increase, attributable to 5G migration and the increased demand for text and messages as a result of COVID-19.
Digital transformation demand from enterprises and the schools continued to drive up with revenues from data communication and the broadband access, which offset the decrease in enterprise voice revenue during the second quarter. Slide 11 illustrates our enterprise business highlights. We are pleased to report strong growth momentum of our emerging enterprise applications. In the second quarter, our total enterprise emerging application revenue increased by 43.5% year-over-year, as all of our major applications demonstrated strong year-over-year growth rate above 20%. AIoT revenue increased by 70% year-over-year in the second quarter, serving as an important growth driver thanks to our success in smart energy, building, and surveillance fields. In fact, in the consumer sector, AIoT applications are also well received to carry out digital life and bring in revenues, particularly from smart speaker and the smart healthcare services.
We remain confident of its future development. For ICT cloud computing and the information security businesses, we continue to see strong demand from both domestic and global clients. We are glad to report year-over-year revenue growth of 24%, 25%, and 29%, respectively. Additionally, 5G private network revenue doubled its growth year-over-year, driven by an increase in acquiring project members that bring in project revenue as well as recurring revenue. We are pleased about the long run contribution. For big data analysis revenue, we saw 125% year-over-year growth, and that contributed to project revenue.
During the quarter, we are pleased to announce the rollout of our advanced industry-leading portable 5G private network solution, which supports satellite and mobile communications and serves as the exclusive, portable solution in Taiwan, working under both non-standalone and the standalone architecture. We also integrate our 5G AIoT sensing devices, AR technology, a domestic 5G, Open RAN equipment and a 5G private network to offer 5G AIoT smart healthcare services, at the hospital in Kaohsiung, applying augmented reality technology for elderly care. Slide 12 illustrates our international business performance. In the second quarter, it is exciting to see our International Business Group revenue increased by 17.9% year-over-year, attributable to the growing demand for ICT and the cloud services from global clients, particularly well-known, global OTT service providers.
In addition, as the COVID-19 pandemic restrictions were relaxed, and cross-border activities continued to resurge, we were glad to see international roaming inbound revenue and international IoT revenue increased year-over-year. As we look to Southeast Asian markets, we are glad to share that we signed an MOU with Thonburi Hospital in Thailand during the second quarter to develop smart care hospital solutions. We introduced our technology of cloud, AI, medical IoT and others, and expect to extend our successful 5G private network solution in the Asian region. Now, I would like to turn the call to Vincent for our financial highlights.
Thank you, President Kuo. Good afternoon, everyone. I will now walk you through an overview of our second quarter financial results. Let's start with slide 14, which provides highlights from our income statement. For the second quarter of 2022, total revenues increased by 5.7% on a year-over-year basis, mainly due to more ICT project completions and higher core business revenues from mobile and broadband services. Meanwhile, operating costs and expenses increased by 5.4% owing to an increase in manpower expenses and depreciation expenses from 5G network deployment. Income for operations increased by 6.6%, while net income increased by 8.1%. EPS increased by TWD 0.01 to TWD 1.25 compared to the prior year period.
In addition, our EBITDA recorded a 5.5% increase year-over-year, while EBITDA margin remained stable in the second quarter. Please turn to slide 15 for balance sheet highlights. Compared to December 31st, 2021, total assets increased by TWD 13.59 billion, or 2.7%, mainly owing to increased cash and cash equivalents as well as the increase in negotiable certificates of deposit to prepare for the dividend payments and the issuance of sustainable bonds. Total liabilities increased by TWD 30.78 billion or 25.3%, mainly attributable to increase in dividends payable. Debt ratio was approximately 29%, and net debt over EBITDA was -0.026, suggesting our balance sheet is strong and enable us to maximize shareholder interest amid economic uncertainty. Slide 16 illustrates our cash flow summary.
Cash flows from operating activities for the first half of 2022 decreased by 0.9% year-over-year to TWD 27.43 billion, mainly due to income tax payments owing to an increase of net income. In terms of capital spending, as 5G CapEx peaked in 2021 with accelerated 5G construction, 5G and total mobile CapEx for the first half of 2022 decreased year-over-year as expected. Moreover, free cash flows increased by 23.2% in the first half compared with the prior year period. Altogether, our strong balance sheet and operating cash flows allow us to sail through economic turbulence and support business expansion. On page 17, you may find a table that compares our financial results with forecasts. As you can see, in the second quarter of 2022, all performance measures exceeded our proposed guidance.
Revenue met guidance mainly attributable to higher revenues for ICT business related to smart energy and AIoT applications and as well as better performance of core business resulted from growing subscription numbers and 5G migration. Operating costs and expenses were higher than our second quarter guidance due to higher project business costs. EBITDA and net income beat forecasts due to better than expected ICT gross margin and performance. That concludes our financial highlights. Let's turn it over back to our President, Harrison Kuo.
Thank you, Vincent. In the second quarter, we became the first and the only company among Taiwanese operators to adopt an internal carbon fee to help reduce carbon emissions and achieve our GHG reduction targets. We have also invested in an ESG venture capital fund targeting clean energy innovative projects, including cloud AI, 5G satellite, edge computing application services, and the digital transformation in the healthcare. We also received multiple recognitions from Taiwan Stock Exchange Corporation for our corporate governance. We believe these new developments are key to our success and the long-term growth. We will continue to focus on ESG development going forward. Thank you for your attention. Now, I would like to open the floor for questions.
Thank you. We're now beginning our question and answer session. If you have a question for any of today's speakers, please press zero-one on your telephone keypad, and you will enter a queue. After you are announced, please ask your question. When you're speaking, please speak louder or closer to the microphone. If you find that your question has been answered before it is your turn to speak, please press zero-two to cancel the question. Our first question is coming from HSBC, Neale Anderson. Go ahead, please.
Thank you. Good afternoon. I have two questions, please. The first relates to the roaming recovery that you reported in the second quarter. Are you able to quantify how much of mobile service revenues that is? And how much more could it grow by if it returns to levels prior to COVID? That's the first question. The second one relates to the slide on the enterprise applications, the emerging applications. So you're reporting strong percentage growth, and I guess that's partly because these are still starting from a low base. Which one of those do you see as having the greatest potential, please? Which could be the largest in a year or two? Thank you.
To answer your question, the contribution from the recovery to the second quarter, the major mobile business growth is not due to COVID-19. It's major from our customer migration and our customer base increase. If I may, let me add here. If we look at the fact sheet provided by us, from the post-paid subscribers, we have a growth momentum. The number what we have is post-paid subscriber increase 18 months in a row. Also, if you look at the post-paid ARPU, actually, our post-paid ARPU actually has received the 13-month high, and ARPU has increased 15 months in a row, year-over-year. Altogether, it actually shows there's a strong growth momentum in our mobile business.
Perhaps we cannot deny that the COVID may contribute to our mobile business, but it accounts for a very small portion. That's for your first question. To answer your second question. Our Consumer and Enterprise and the International Business Group all have great potential in the future in one or two years. Because there are many small solutions, applications we are deploying in the next quarter or the next half.
We have seen that many of our successful applications from our consumer and the enterprise and the international fields. There are many business opportunities in all of our business segments.
Understood. Thank you very much.
Thank you. As a reminder, please press zero-one on your keypad if you would like to ask the question. Please press zero-one on your keypad if you would like to ask the question. If you have a question for any of today's speakers, please press zero-one. Thank you. The next question is coming from DBS. Sara Wang, go ahead, please.
Hi. Thank you for the opportunity to ask a question. Just wondering how the margin profile of the enterprise business segment. We noticed that there are certain, say, cloud data center services, the business growth is quite rapid. What's the margin profile of these new initiatives? What's our view on overall EBITDA margin, say, in mid- to long-term? Thank you.
For the gross margin for our enterprise segment is about 20%+, and it's quite stable. We think with the new application like AIoT, 5G private network, we think the growth will be moderate. It will be increasing. It will ramp up in fact. It's hard to say at this point what kind of growth it's gonna be in the long term, too, in the medium term.
I see. Thank you.
Thank you. Ladies and gentlemen, we are now in question and answer session. If you have a question for any of today's speakers, please press zero one. Thank you. As a reminder, press zero one on your keypad if you would like to ask a question. If there are no further questions, I will turn it back over to President Kuo. Please go ahead.
Thank you for your participation. Goodbye.
Thank you. President Kuo. Thank you for your participation in Chunghwa Telecom's conference. There'll be a webcast replay within an hour. Please visit www.cht.com.tw/ir under the IR calendar section. You may now disconnect. Goodbye.