1. Which mobile phone models does the remote control support? Answer: For iPhone, it supports iPhone 5 and later models running the latest iOS versions. For Android phones, OTG functionality is required (supported by nearly all modern Android devices). If unsure, search online: “Does [your phone model] support OTG?”2. Can the remote control operate all home appliances? Answer: It supports over 90% of infrared-enabled home appliances available on the market, including major brands. If a device isn’t pre-programmed, Android users can use the DIY learning function to add it. iPhone does not support the learning function. Non-infrared devices—such as those using Bluetooth or 2.4 GHz wireless protocols—cannot be controlled.3. What is the effective operating range? Answer: The range depends on the appliance’s IR receiver sensitivity. Typical tested distances are 8–15 meters, sufficient for everyday use.4. Does the remote require line-of-sight alignment? Answer: Yes. Like standard IR remotes, it must be pointed directly at the appliance without obstruction.5. For iPhone, the remote is detected when plugged in, but why won’t it pair and why doesn’t the indicator light flash? Answer: Go to Settings > General > Accessibility > Audio/Visual, and disable Mono Audio (an accessibility feature for hearing imbalance; disabling it won’t affect normal call functionality).6. Why isn’t the remote recognized after plugging it into an Android phone?