I seem to have spent hours of my life researching which phones my new Oticon Reals will connect to, so I thought I'd share it here.
The bottom line seems to be that if you have an iPhone, you're fine. If you have an Android, the most you can hope for is to stream sound from your phone directly to your aids. Whether you will be able to do this depends on your aids, the make and model of your phone, and the Android version it's running. If you can't do it direct you should be able to do it using a ConnectClip.
There is a (well hidden) page on the Oticon website setting out which phones are definitely OK to do this but it's not exclusive. Link here https://www.oticon.com/support/compatibility?filters=Oticon%20Real%E2%84%A2%20miniRITE%20R
Despite many people saying'I can bluetooth my Android, no problem' it is NOT possible to use an Android to stream phone calls direct to your ears without a ConnectClip. The direct connection only allows for one way communication. If you want to listen to podcasts, audiobooks etc, that's fine, but you can't speak back on a phone call.
If you are able to set up hands free calls on your phone, there is apparently a workaround whereby you can effectively use your aids as a pair of Bluetooth earbuds and use the microphone in your phone to speak back. I haven't tried this so I can't say how well it works.
I'm heavily invested in Android and really, really don't want to switch, but I'm reluctantly considering it. I have a ConnectClip and it works fine, but it's another bit of kit to wear, switch on, keep charged etc.