It is now 2019 and I still canNOT connect to either of my H9s with iOS. I downgraded one device to 5.4.0 and no luck. The other device is 5.6.0. Some times it will ask for the Bluetooth PIN, many times it simply says, “pairing unsuccessful”. I have attempted connection with 1 iPad Air 2 (12.1.1) and two different iPhones 6s (12.1.2). This has really impacted my playing as I don’t always have a laptop with me at a gig.