# United Kingdom

What you need to send to United Kingdom on each channel: what is asked for, who files it, how long it takes and what happens if your sender isn't approved.

**Language:** en
**Audience:** platform
**Translation key:** platform.channels.countries.united-kingdom
**Search keywords:** United Kingdom registration, send sms to United Kingdom, United Kingdom requirements, United Kingdom rcs, sender United Kingdom, United Kingdom, GB, +44
**Docs index (every page):** https://docs.instasent.com/llms.txt
**This zone's index:** https://docs.instasent.com/platform/en/llms.txt
**This page:** https://docs.instasent.com/platform/en/channels/countries/united-kingdom/ (HTML) · https://docs.instasent.com/platform/en/channels/countries/united-kingdom.md (Markdown)
**Other language (es):** https://docs.instasent.com/platform/es/channels/countries/united-kingdom.md

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    The authoring contract is docs/AUTHORING-COUNTRIES.md.
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## What this country needs

### SMS

- **Your sender** — Your alphanumeric sender is accepted as it is.
- No registration needed — creating the sender is enough.

### RCS

- **What they ask for** — Brand verification by a third party · Email to the operator · A public inbox somebody watches
- **Who acts** — You send the email to the operator yourself.
- **Have this ready** — A public profile phone number using the +44 prefix; A named brand contact with a corporate email address they read daily; The @aegismobile.com domain allowlisted in your mail filter; The logo and banner we provide, to attach to the authorisation email
- **Without an approved registration** — Nothing is sent to this country until the registration is approved.

The United Kingdom verifies brands **differently for each operator**, so a registration moves
along several tracks at once.

- **BT and EE** — Brand Assure contacts your named contact to approve the use of the brand name
  and its images.
- **O2** — Aegis Mobile writes from `certify@aegismobile.com`. Allowlist that domain: the check
  includes a two-factor PIN **valid for 7 days**, and if the mail lands in spam the window closes
  on its own.
- **Vodafone and Three** — require a **proactive authorisation email**, sent by the brand rather
  than by us. Once the request is ready we give you the recipients, the current template, the
  agent identifier and the images to attach. **Don't send anything before that**: the operator
  matches your email against a filing that has to exist first.
- **Lycamobile and Sky** may follow a different process. We confirm their availability and the
  applicable steps before starting.

### On promotional campaigns

The opt-out instruction has to be explicit. If you use a link, the message must clearly say the
user has to tap it to stop receiving communications.

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This is one page of the Instasent documentation. For the complete machine-readable index of every guide and API reference, fetch https://docs.instasent.com/llms.txt — start there for full context.