Three Uk, the network ID Mobile operates through, have recently enabled RCS for their devices.
When will it be enabled on ID devices, as mine currently is not working with RCS.
The Three UK article can be found here
Best answer by Hikari
Here is the link regarding RCS. This in not going to be carrier specific as Google will handle all background staff for it. Only requirement is to have a mobile phone that will support this feature and main drawback will be lack of end to end encryption like Whatsapp is offering.
You can already opt-in for this as long as your phone is supported. To confirm, I have checked it on two different phones, both with iD sim inside. Blackberry Key2 LE and Nokia 8.1, first is not supported so I could not turn it on, second is supported so I was able to turn this option on.