TL;DR
- Ofcom’s General Conditions of Entitlement require all mobile operators to provide or support a range of accessibility measures for disabled and vulnerable customers.
- Relay UK, the text relay service replacing the old BT Type Talk, must be supported by all providers so deaf, hard-of-hearing and speech-impaired users can make and receive calls.
- Priority fault repair means customers with a disability that makes their landline or mobile their only means of contacting emergency services can get faster repairs.
- Operators must provide bills and contract terms in accessible formats (large print, Braille, audio) on request at no extra charge.
- Operators must publish and maintain an accessibility scheme and vulnerability policy, with a dedicated team or process to support customers registering as vulnerable.
The regulatory framework behind mobile accessibility
Ofcom’s authority to mandate accessibility measures derives primarily from the Communications Act 2003 and the Electronic Communications (Universal Service) (Accessibility Requirements) Order 2003, alongside the General Conditions of Entitlement (GCE) — the set of binding rules all UK electronic communications providers must follow. The Equality Act 2010 runs in parallel, requiring providers as service providers to make reasonable adjustments for disabled customers. Ofcom reviews the GCE periodically and updated its accessibility requirements in 2022 to reflect the shift from older text relay systems to the modernised Relay UK platform and to align with updated ETSI accessibility standards referenced in European and retained UK telecoms law.
All mobile network operators with retail customers in the UK are subject to the GCE requirements. This includes the four main infrastructure operators and the many mobile virtual network operators (MVNOs) that use their networks. Ofcom publishes an annual telecoms accessibility report documenting compliance levels and areas where additional action is required. Where an operator falls short of its GCE obligations, Ofcom can issue enforcement notifications and, where breaches are serious or persistent, financial penalties under the Communications Act 2003.
Relay UK and communication relay services
Relay UK is the national text relay service operated on behalf of the UK telecoms industry. It replaces the older BT Type Talk system and is designed for customers who are deaf, hard of hearing, have speech impairments, or have conditions that make voice communication difficult. Using the Relay UK app (available on iOS and Android) or a textphone, a user types their side of a conversation, which a relay assistant then reads aloud to the other party; replies are typed back. The service operates around the clock and at no extra charge beyond the standard call cost.
Ofcom’s General Conditions require all mobile operators to ensure their networks support Relay UK calls. This means the operator must not block or degrade Relay UK traffic on their network and must ensure that emergency calls via Relay UK are routed correctly to 999 services. The emergency dimension is particularly important: Relay UK supports access to 999 for customers who cannot use voice calls, and operators must ensure this pathway functions reliably. Separately, the Emergency SMS service allows deaf and hard-of-hearing users to register to send an SMS to 999, and Ofcom monitors operator support for this service.
Priority fault repair for disabled customers
Ofcom requires operators to maintain a priority fault repair scheme for customers whose disability means they depend on their mobile service as their primary or only means of contacting emergency services. Customers who register for this scheme should receive a faster response to reported faults compared with the standard repair timeframe. The exact service level commitments vary by operator — the GCE sets a minimum standard but operators may offer more — and Ofcom expects operators to publicise the scheme clearly in their accessibility materials.
To register, customers typically contact the operator’s dedicated accessibility or vulnerability team and provide a brief description of their need. Operators are not permitted to require medical proof as a condition of registration, though they may ask for a self-declaration. Once registered, the customer’s account is flagged so that any reported fault triggers the priority response pathway. Customers can register at any time, not only when they first sign up, and the registration does not expire automatically, though operators may ask for periodic confirmation.
| Requirement | What operators must provide | Who it applies to | Cost to customer |
|---|---|---|---|
| Relay UK support | Network must route Relay UK calls, including 999 access | Deaf, hard of hearing, speech impaired | Standard call rate; no additional charge |
| Priority fault repair | Expedited repair for customers dependent on service for emergency contact | Registered disabled customers | No charge for priority status |
| Accessible bills & terms | Large print, Braille, audio format on request | Customers with visual impairments or print disabilities | No extra charge |
| Accessibility scheme publication | Published, maintained scheme detailing all services available | All retail customers | Not applicable |
| Vulnerability policy | Dedicated process for customers in vulnerable circumstances | Customers in vulnerable circumstances | No charge |
| Emergency SMS (999) | Network must support registered Emergency SMS to 999 | Pre-registered deaf and hard-of-hearing users | No charge |
Accessible bills, contracts and customer communications
Under the GCE and the Equality Act 2010 reasonable-adjustment duty, mobile operators must provide bills, contract terms, and other key customer documents in accessible formats on request. Formats typically available include large print, Braille, and audio recordings. Operators must not charge extra for accessible formats. This obligation extends to notifications of contract changes: if an operator is changing its terms or prices, the notification must be available in an accessible format for any customer who has registered a need for one.
Ofcom has also encouraged operators to make their websites and apps accessible in line with Web Content Accessibility Guidelines (WCAG) standards, though Ofcom’s direct enforcement powers here overlap with the Equality Act framework enforced by the Equality and Human Rights Commission. Customers who find that an operator’s digital channels are inaccessible can raise this under the Equality Act as a failure to make reasonable adjustments, in addition to any complaint to Ofcom about compliance with the GCE transparency requirements.
Registering as a vulnerable customer
Operators are required by Ofcom to have a published and operational process for customers to register as vulnerable or in need of additional support. The category of “vulnerable customer” is broad and intentionally so: it includes not only disabled customers but also those experiencing mental health difficulties, financial hardship, or temporary circumstances such as bereavement or domestic abuse. Once registered, a customer’s account should be flagged to ensure that customer-service interactions are handled with appropriate care, that debt-collection processes are adapted, and that the customer is directed to the relevant accessibility services.
Ofcom does not prescribe a single registration mechanism, but it expects operators to make registration straightforward, non-stigmatising, and available through multiple channels including telephone, written request, and online where the operator offers digital account management. Customers should not face barriers such as lengthy evidence requirements or frequent re-registration demands.
What this means in practice
Sandra is profoundly deaf and relies on her mobile for text communication and on the Emergency SMS service to contact 999 if needed. She switches to a smaller MVNO and finds that the Relay UK app shows an error when attempting to connect calls through the new operator’s network. She contacts the operator’s accessibility team, citing GCE Condition C8 (the accessibility General Condition) and Ofcom’s requirement to support Relay UK routing. The operator investigates and identifies a misconfiguration in its IP Multimedia Subsystem (IMS) gateway affecting relay-service traffic. The fault is resolved within 72 hours, and Sandra receives confirmation in writing. She also registers for priority fault repair, so any future similar issue will be escalated automatically.
Related Guides
Related Guides
How we verified this
This article was verified against Ofcom’s General Conditions of Entitlement (specifically Conditions C8 and related accessibility provisions), the Electronic Communications (Universal Service) (Accessibility Requirements) Order 2003, Ofcom’s 2022 accessibility update and annual telecoms accessibility reports at ofcom.org.uk, Relay UK operational guidance, and the Equality Act 2010 reasonable-adjustment framework as it applies to communications providers.
Disclaimer: Kaeltripton.com is an independent UK editorial publisher. We are not regulated by Ofcom or the FCA and we do not sell or arrange mobile services, insurance, or financial products. This content is for general information only and is not legal, financial, or technical advice. Rules, prices, and operator policies change. Verify the current position with Ofcom, GOV.UK, the ICO, or your provider before acting. ICO registered ZC135439. Last reviewed: 2026-06-05.
Frequently Asked Questions
What accessibility services must mobile operators provide?
Ofcom’s General Conditions require all mobile operators to support Relay UK (text relay for deaf and speech-impaired users), provide priority fault repair for customers dependent on the service to contact emergency services, supply bills and key documents in accessible formats (large print, Braille, audio) on request at no extra charge, and maintain a published accessibility scheme and vulnerability policy. Emergency SMS access to 999 must also be supported for pre-registered users.
Can I get a priority repair service as a disabled mobile user?
Yes. Ofcom requires operators to maintain a priority fault repair scheme for customers with disabilities who depend on their mobile service as their primary means of contacting emergency services. You register directly with your operator’s accessibility or vulnerability team; no medical evidence is required, only a self-declaration. Once registered, any fault you report should trigger an expedited repair process ahead of the standard queue, at no additional cost.
What is Relay UK and how does it work for mobile?
Relay UK is the national text relay service for deaf, hard-of-hearing and speech-impaired users. Using the free Relay UK app on a smartphone, you type your side of a call; a relay assistant reads it aloud to the other party and types back their response. All mobile operators are required by Ofcom to route Relay UK calls on their networks, including calls to 999. The service operates 24 hours a day, 7 days a week, and there is no additional charge beyond the standard call rate.
How do I register as a vulnerable customer with my mobile operator?
Contact your operator’s accessibility or vulnerability team — contact details should appear in its published accessibility scheme, typically found on its website. Explain your circumstances; Ofcom requires the process to be straightforward and non-stigmatising, and operators must not demand extensive evidence. Registering flags your account so that relevant services (priority repair, accessible documents, adapted debt management) are applied automatically. Registration is available at any time and at no charge.
Do mobile operators have to provide accessible bills?
Yes. Under Ofcom’s General Conditions and the Equality Act 2010 reasonable-adjustment duty, mobile operators must provide bills, contract terms and key notices in accessible formats — including large print, Braille and audio — on request. There is no additional charge for accessible formats. Operators must also ensure that notifications of price or contract changes are available in accessible formats for any customer who has registered a need, so that important contractual communications reach every customer effectively.
