The document provides examples of customer inquiries and identifies the appropriate level for each inquiry, with three levels ranging from general to specific. For inquiries about addressing changes, bill charges, inability to make calls, invoice reprints, bill cycle dates, upgrade eligibility, amount due, better rate plans, messaging issues, app refunds, voicemail issues, adding family members to a plan, and contract end dates, the document matches each example to the corresponding level 1, 2, or 3 category.