eSIM vs physical SIM explained for dealers: learn how eSIM activation works, common compatibility pitfalls, dual SIM setups, and quick troubleshooting steps to reduce activation issues and returns.

Proximity sensor explained: Learn why phone screens go dark on calls, what causes false triggers (dirty sensor area, screen protectors, thick cases, app behavior), and the quick dealer checklist to fix “screen won’t turn on during calls” complaints fast.

Haptics explained: Learn why vibration feels different between phones, the most common settings that affect vibration, and the dealer checklist to identify whether a vibration complaint is app/settings-related or a real hardware problem (rattling, cut-outs, extreme weakness).

Carrier IQ explained: Learn how to address customer privacy fears in plain English, explain the difference between carrier diagnostics vs app tracking, and use a simple dealer script + “privacy tune-up” checklist to reduce churn and build trust.