@MDWMG, have you read this thread? As per my post a few posts back I just plug in my Android phone and the connection is re-paired with the last settings. Note, you may have to delete previous connections.
@Martinonline, thank you - yes I had read this thread (also the Software Update thread and the Diagnostic thread - they all have posts referencing the Bluetooth connection issue) but I hadn't followed up on your suggestion.
I collected my Trophy ER, new, in September; the software it came with was well behind the latest versions - it had Infotainment version 1300r40. Bluetooth worked OK, most of the time, but every so often the car would forget paired devices. Of course, what happens is you get in the car, start driving, get an incoming call, and realise the phone is ringing, in your pocket, not connected, and can't be answered!
This used to happen about every 7-10 days. Comments on this forum suggested it was an issue associated with the Infotainment software version, so I requested that be updated under warranty, along with other software modules. The updates were done a couple of weeks ago, and I now have 1300r63 Infotainment software - the latest UK version. Since then the car forgets my phone nearly every day!
Every time it is paired, the phone creates a new connection with the same name. There is no way of telling which is the most recent one, so if I find two or more listed I delete them all before re-pairing.
I haven't used Android Auto, so never connected it by usb. Next time it forgets the connection (probably tomorrow!) I'll try your suggestion of plugging it in.