!!! Overview
[{$pagename}] ([RCS]) is a [communication|Telecommunications] [protocol] between [Mobile Network Operators] ([MNO]) and between [devices], aiming at replacing [SMS] messages with an [Instant Messaging] system that is more rich, provide phonebook polling (for service [Discovery Mechanism]), and transmit in-call multimedia.[{$pagename}] has been under [GSMA] since [2008|Year 2008]

!! [{$pagename}] Technology
[{$pagename}] uses a [Federated Identity] model where different carriers are in charge of the [servers] that deliver [messages] to their [Subscribers] which makes it more complicated as there is no central [database]. [{$pagename}] sends a query directly to the other [devices] on that chat with an invisible [message] to determine asking if the device supports [{$pagename}].

[{$pagename}] is still tied to a [Phone Number].

!! [{$pagename}] [Implementations]
[{$pagename}] according to [GSMA] has at least 50 [Mobile Network Operators], none of them have significant [Implementations].[Samsung] is the major [device] OEM to support [{$pagename}] globally. Samsung RCS capable [devices] have been commercially launched in Europe since [2012|Year 2012] and in the United States since [2015|Year 2015].

[Google] has [RCS Chat]

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Rich_Communication_Services|Wikipedia:Rich_Communication_Services|target='_blank'] - based on information obtained 2017-07-25