I received an email from my Cochlear representative this morning concerning the N7 and Kanso2 iOS and Android pairing questions. I will copy and paste.
You can pair your Nucleus 7 or Kanso 2 Sound Processor with up to five compatible Apple devices and have the Nucleus Smart App installed on all of them. However, you can only connect one compatible Apple device to your sound processor(s) at a time.
In order to use the Nucleus Smart App for Android, your device will need to run Android 5.0 (Lollipop) or later and support Bluetooth 4.0 or later. For a list of compatible devices visit www.cochlear.com/compatibility
If your device is not on this list but uses Android 5.0 and Bluetooth 4.0, the Nucleus Smart App may still work, but we are not able to offer the same level of support in troubleshooting scenarios.
Will you clarify what the forum was referring to when they said they have trouble pairing. This way on Monday I can get some more details for you.