RCS Registration & Launch Guide

Shahzad_Ismail — Fri, 10 Apr 2026 09:14:28 GMT

Onboarding for RCS is separated into two phases: RCS Agent Registration and RCS Agent Launch. Below are the country and carrier specific rules.

Review these before registering an RCS Agent to ensure the agent is set up correctly.

RCS Agent Registration

Sinch tools and platforms can be used to register (create) RCS agents. A guide to creating an RCS agent in the Sinch Build Dashboard is available here.

Provisioning API is available as a programmatic solution.

After an agent is created, test messages can be sent to RCS for Business enabled devices.

Agents can be registered and tested on enabled devices in any country, even where RCS is not currently available for launch. Country coverage can be viewed here. Supported countries/carriers are updated regularly, check with your Account Manager for the latest.

Available markets relate to where an RCS message is terminated, not where a company is based/originating the message.

Note: Some carriers include messages on non-verified agents during testing, highlighting that the agent is not verified.

Testing on AT&T devices requires additional steps and approval. Work with your Account Manager to enable testing.

RCS Agent Launch

RCS agents must be submitted for verification and approval before live traffic can be sent. The processes and requirements for verification and launch are determined by Google and the carriers.

Launch status can be found using the Provisioning API or the Build Dashboard. Updates may also be communicated by your Account Manager.

Carrier requirements and steps for launch

Note: RCS requirements and rules change periodically. Sinch continues to evolve our process to meet these changes.

Carriers have varying requirements for verification and launch; most of this information is collected as part of the set up and launch process, but some steps need to be completed separately.

Timelines for launch vary by region and carrier. The best way to ensure a quick and smooth launch is to ensure all guidelines are followed, and all required information is provided in a timely manner.

Only carriers with specific rules or processes are included below. Additional carriers are available for launch.

Carrier/Country Specific Rules

Brazil	Generic senders are not allowed – all agents must be for the brand sending the messages
France	For Upscale the message must contain a weblink for opt-out If a paid phone number is included the rate should be indicated in the phone label (i.e. .025 €/min)
Germany	Generic senders are not allowed – all agents must be for the brand sending the messages T&C should be in German or include the option for a translated version If a contact number is provided, it must be a +49 number An agent name can only be used once, even by different partners (i.e. there can only be one agent called Sinch, other agents need to be called Sinch OTP, Sinch Promotions).
UK	If a contact number is provided, it must be +44 number Demo agents must have “demo” in the agent’s name The region for RCS agents must be set to EU during agent registration.
US	Generic senders are not allowed – all agents must be for the brand sending the messages Agents must be registered as non-conversational. Session based billing (Conversational RCS agent type) is not supported by US carriers. The agent's description must include information about what the agent does and the service it provides (i.e. no taglines). The keywords STOP, HELP and START and their corresponding replies must be supported and compliant. The carriers will test these as part of the verification and launch process. The region for RCS agents must be set to US during agent registration. In addition to the content prohibited by Google’s Acceptable Use policies, the following content is also prohibited: T-Mobile. Age-gated content (as defined in the T-Mobile Code of Conduct) Donation/Pledge Solicitation Loan Arrangement Social Media Sweepstakes/Contest. AT&T Payday loans, cash advance services No loan ads other than messages from direct lenders for secured loans No credit repair debt relief No work from home/secret shopper ads No lead gen campaigns that indicate sharing information with 3^rd parties No charitable donation campaigns (text to donate). Verizon Collections from 3^rd parties (collection agencies) Short term loan campaigns (except from direct lender) Generic job alerts (except for a company hiring for themselves) Affiliate marketing.

Carrier/Country Specific Steps

Google, Sinch or the carrier might reach out to request additional information. Send documentation to your Account Manager unless otherwise specified.

All Google Guest Coud carriers	The brand must reply to an email from Google confirming information about the agent. Corporate email address must be used which matches the brand information used in the agent. Emails will come from rbm-support@google.com.
Austria	Brand Approval Form for A1 Send completed form to your Sinch Account Manager.
Belgium	Telenet Registration letter Send completed form to your Sinch Account Manager.
Brazil	Brand will need to provide approval and information including Tax ID. Customer needs to reply to an email from the Sinch SI team.
Canada	Canada RCS for Business Agent Application Form Send completed form to your Sinch Account Manager.
Finland	Brand Approval Form Send completed form to your Sinch Account Manager.
France	Carrier may reach out to the brand to confirm agent information including that the phone number and email address work. SIREN (Company ID number) is required.
Germany	Brand Approval Form – This must be hand signed in blue ink and stamped. Docusign also permitted. Send the completed and signed from to: brandapproval@rcsbusinessmessaging.de.
Italy	Vodafone Brand Verification letter. Send completed letter to your Sinch Account Manager.
Netherlands	Vodafone and Odido: Brand Verification letter. The Google RCS Agent ID is available in Sinch Build or from your Account Manager. Expected format: XXX-NNN- ZZZ. Send completed verification letter to: wholesaleenablers@vodafoneziggo.com and Maarten.de.vos@odido.nl
Singapore	ACRA (company registration certificate) XXX & LOA (letter of authorization). Send completed forms to your Sinch Account Manager.
Spain	Note: The email sent from Google to the brand for agent verification references Telefonica instead of Sinch.
UK	Brand needs to send the following email to the UK carriers: To: a2pmessaging@bt.com, RCS_approval_reqs@o2.com, Laurence.laroche@three.co.uk, mihaela.sandru@vodafone.com. Subject: [AGENT NAME] RBM brand approval Hi, Approval for Agent: [AGENT ID] I at [BRAND/COMPANY NAME] confirm that I am authorised to use the following name: [AGENT NAME], logo and images, as shown in the attached image file (s) for the RBM agent. I hereby confirm that I give permission to [AGENT OWNER/ AGGREGATOR] to register this RBM agent and use the logo for the purpose of sending RBM messages to the users of [OPERATOR NAME] networks (s) on our behalf. Regards [FULL NAME] [JOB TITLE] [COMPANY]
USA	Brand Vetting to be completed before an agent is submitted to the carriers. Brand Verification Form Carriers Completed Verizon Launch form Completed (all) US requirements form Digital assets (logo, banner) submitted for the brand verification token must exactly match the agent and other submitted content. Send completed forms to your Sinch Account Manager.

ASP/Reseller Support

For partners wishing to use their own name instead of Sinch’s when Google/Carriers communicate with brands, the following steps can be taken:

Czech Republic – Company can complete a 3^rd party reseller letter for T-Mobile.
Send completed letter to your Sinch Account Manager.
France – Free Mobile Authorization letter between Sinch and reseller and the Authorization letter between brand and reseller must both be completed.
Send completed letter to rbmregistration@free-mobile.fr.
Germany – let your Sinch Account Manager know and they will work with you to complete the process.
UK – two emails must be sent to the carriers, one from the brand authorizing the reseller and one from the reseller authorizing Sinch
US – Google Guest Cloud carriers only. Google will reach out to the reseller/partner for confirmation and authorization. Google will use the partner’s name in the verification email to the brand instead of Sinch’s for Google Guest Cloud carriers.

Notify your Account Manager before you submit for launch.

Note: Not all carriers support this process.

Reminder: If Google learns that an agent is in violation of Google’s Acceptable Use Policy or an agent experiences high spam reports, they may notify the carriers and Sinch and un-launch the agent.