requires the customer to finance the initial purchase price of the iPhone with a third-party lender. Upon exercise of the trade-in right and purchase of a new iPhone, the Company satisfies the customer’s outstanding balance due to the third-party lender on the original device. The Company accounts for the trade-in right as a guarantee liability and recognizes arrangement revenue net of the fair value of such right with subsequent changes to the guarantee liability recognized within revenue. 

The Company has entered into indemnification agreements with its directors and executive officers. Under these agreements, the Company has agreed to indemnify such individuals to the fullest extent permitted by law against liabilities that arise by reason of their status as directors or officers and to advance expenses incurred by such individuals in connection with related legal proceedings. It is not possible to determine the maximum potential amount of payments the Company could be required to make under these agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each claim. However, the Company maintains directors and officers liability insurance coverage to reduce its exposure to such obligations. 

Critical Accounting Policies and Estimates 

The preparation of financial statements and related disclosures in conformity with U.S. generally accepted accounting principles (“GAAP”) and the Company’s discussion and analysis of its financial condition and operating results require the Company’s management to make judgments, assumptions and estimates that affect the amounts reported in its consolidated financial statements and accompanying notes. Note 1, “Summary of Significant Accounting Policies,” of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Form 10-K describes the significant accounting policies and methods used in the preparation of the Company’s consolidated financial statements. Management bases its estimates on historical experience and on various other assumptions it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates, and such differences may be material. 

Management believes the Company’s critical accounting policies and estimates are those related to revenue recognition, valuation and impairment of marketable securities, inventory valuation and valuation of manufacturing-related assets and estimated purchase commitment cancellation fees, warranty costs, income taxes, and legal and other contingencies. Management considers these policies critical because they are both important to the portrayal of the Company’s financial condition and operating results, and they require management to make judgments and estimates about inherently uncertain matters. The Company’s senior management has reviewed these critical accounting policies and related disclosures with the Audit and Finance Committee of the Company’s Board of Directors. 

Revenue Recognition 

Net sales consist primarily of revenue from the