Retrieve detailed narrative information about the eSIM Finder product and connector, beyond what the search/checkout tools surface. Use this for any question that is NOT a price/plan search: how the product works, device compatibility and how to install, the Annual Travel Pass, the country coverage of a regional bundle, plan tiers, and — importantly — help when something is not working or after the user has bought (troubleshooting, error messages, managing an installed eSIM). Reach for it on any "how do I...", "what is...", "my eSIM is not working", or "what do I do after buying" question. Pass one of the following `topic` values: `about` (what the eSIM Finder connector is and its scope, plus that eSIM Finder is also a free iOS/Android app with a website FAQ and blog), `faq` (18 common Q&A pairs from esimfinder.io/faq — quick reference for first-time users), `travel-pass` (full Annual Travel Pass guide including the complete 130-destination coverage list — best when the user is weighing whether Travel Pass fits their travel pattern), `compatibility` (which phones support eSIM and how to check, per-device install steps for iPhone / Samsung / Pixel / other Android, the pre-travel checklist, and full troubleshooting — no signal or no data after install, activation and QR-code errors, specific iOS/Android error messages such as "This Code is No Longer Valid" or "Cellular Plans From This Carrier Cannot Be Added", slow data, carrier-lock, and network reset; use this whenever the user cannot get the eSIM to install or connect), `regions` (live country lists for every regional eSIM bundle currently on sale — Global, Europe, Europe Lite, Balkans, CIS, Asia, Oceania, Middle East, MENA, Africa, CENAM, Latin America, Caribbean, North America — generated from the current catalog; use this when the user asks "what countries are in X bundle?" or "how does Europe differ from Europe Lite?"), `product-overview` (what eSIM Finder is, app download links for iOS/Android, key features, support contacts, and managing an installed eSIM: safely removing or transferring it, a lost or stolen phone, finding the ICCID, hotspot/tethering, Wi-Fi calling on the primary number, and what to do when data runs low), or `plan-tiers` (compare Fixed vs Unlimited Essential vs Premium Unlimited data tiers). The response is markdown text from the eSIM Finder knowledge base; the regions topic is generated live from the current catalog. Prefer this tool over guessing — the knowledge base is the canonical source.