Does iOS Automatically Reconnect to Disconnected BLE Devices, or Is It App-Driven? I have a few questions regarding BLE device reconnections in iOS: When a BLE device gets disconnected, does iOS automatically attempt to reconnect to it, or is it the app’s responsibility to handle the reconnection logic? If the app doesn’t initiate a BLE scan, will the OS still attempt to reconnect to previously paired devices, or is manual intervention by the app necessary? What is the recommended approach to re-establish a BLE connection when: The app has been deleted. The BLE device remains connected in the iPhone's Bluetooth settings. The app is reinstalled later. Any insights or best practices would be greatly appreciated!

I'm encountering an issue where a specific BLE device (a Telematics Control Unit) is being discovered by some iPhone models but not others, all running the same iOS version (18.0.1). Here's the breakdown: Successful discovery: iPhone 11, iPhone 14 Plus, iPhone 6s No discovery: iPhone 13, iPhone 12 mini Firmware: The TCU firmware is up-to-date. BLE: Bluetooth is enabled on all devices. I've tried basic troubleshooting like restarting devices and resetting network settings, but the issue persists. Could this be related to differences in Bluetooth chipsets or antenna designs between iPhone models, even with the same iOS version? Are there any known compatibility issues between this TCU and specific iPhone models? Any insights or suggestions for further debugging issue would be greatly appreciated!