What new Sonos device are you trying to add from your Android controller, it sounds like you added them all from the iPhone?

Sonos only works over a single LAN so if your Android is not connected to your (usually via WiFi) LAN it won’t be able to see your existing (set up from the iPhone) Sonos system.

Also, you need to be selecting ‘join existing system’ on your Android, since you’ve already set up the Sonos using the iPhone. 

I'm not on a lan line I'm using my WiFi data on phone(android) think I need another android phone as a guest phone.

Thanks.

Yes, any device that is a hotspot can not be used as a controller as well, you’ve always needed a second device. 

Yes, you cannot command the system from the same phone you are using to get the wifi from. Remember for Sonos this is an unsupported set up. That does not mean it won’t work though.

Thanks for advice all sorted now