The following discussion relates to our results of operations for the three months ended September 30, 2024 compared to the three months ended September 30, 2023:
Broadband Subscribers. We lost approximately 43,000 net broadband subscribers for the three months ended September 30, 2024 compared to the loss of approximately 59,000 net broadband subscribers during the same period in 2023. The decrease in net broadband subscriber losses was primarily due to the new EchoStar XXIV satellite service launch and increased subscriber demand for our new satellite service plans. Churn of legacy subscribers has started to improve as prior churn and migrations have resulted in increased capacity availability and service satisfaction. In addition, net broadband subscriber additions for the three months ended September 30, 2024 were negatively impacted by the ACP program funding concluding on June 1, 2024. We continue to operate in a highly competitive environment, with continued pressure from satellite-based competitors and other technologies.
Service revenue. Service revenue totaled $296 million for the three months ended September 30, 2024, a decrease of $62 million, or 17.2%, as compared to the same period 2023. The decrease was primarily attributable to lower sales of broadband services to our North American and international consumer customers and our North American enterprise customers. In addition, the three months ended September 30, 2023 was positively impacted by revenue from Hughes Systique which was deconsolidated from our Condensed Consolidated Financial Statements as of December 31, 2023.
Equipment and other revenue. Equipment and other revenue totaled $86 million for the three months ended September 30, 2024, an increase of $33 million, or 61.0%, as compared to the same period in 2023. The change was primarily attributable to an increase in hardware sales to our North American and international enterprise customers.
Cost of services. Cost of services totaled $172 million for the three months ended September 30, 2024, an increase of $40 million, or 30.4%, as compared to the same period in 2023. The increase was primarily attributable to an increase in transponder lease costs from the EchoStar XXIV operating lease, partially offset by lower costs of broadband services to our North American and international consumer customers and our North American enterprise customers. Our Cost of services represented 58.1% and 36.9% of Service revenue during the three months ended September 30, 2024 and 2023 respectively. This increase primarily resulted from an increase in transponder lease costs from the EchoStar XXIV operating lease, and a change in service mix to lower margin services.
Cost of sales - equipment and other. Cost of sales - equipment and other totaled $74 million for the three months ended September 30, 2024, an increase of $31 million, or 72.2%, as compared to the same period in 2023. The increase was primarily attributable to the corresponding increase in equipment revenue.
Selling, general and administrative expenses. Selling, general and administrative expenses totaled $98 million for the three months ended September 30, 2024, a decrease of $6 million, or 5.6%, as compared to the same period in 2023. The change was primarily attributable to a decrease in costs to support the Company and lower marketing expenditures, partially offset by an increase in bad debt expense.
Interest income, net. Interest income, net totaled $2 million for the three months ended September 30, 2024, a decrease of $20 million, or 89.8% as compared to the same period in 2023. This decrease primarily resulted from lower average cash and marketable investment securities balances during the three months ended September 30, 2024.
Income tax benefit (provision), net. Our income tax benefit (provision), net was $16 million benefit for the three months ended September 30, 2024, as compared to $11 million provision for the three months ended September 30, 2023. This change was primarily related to a decrease in “Income (loss) before income taxes” and changes in our effective tax rate. Our effective tax rate during the three months ended September 30, 2024 and 2023 was impacted by federal and foreign valuation allowances related to investments and foreign losses.