“Using CallGenie to switch to TNBN is safe and simple and saved our school £475 per annum. We highly recommend this service to all UK schools & Business”

Rabbsfarm School – Greater London

Welcome to CallGenie by TNBN - Instant phone savings at your fingertips.

CallGenie allows any UK School or business to reduce its landline rental by 10% and outbound UK, Mobile and International calls by 50%, simply by loading up your last bill and switching to TNBN.

How does it work?


Load up your last business landline phone bill and we’ll work our magic to reduce your bill


Our systems will reduce your UK, mobile and International calls by 50% and landline charges by 10%


We will confirm your new rates in writing within 48 hours and will switch you to TNBN on your preferred switch date

Contract – 31 days rolling

We want all customers to feel happy and not tied into any long term contracts. Therefore, we offer our service on a 31 day rolling contract that will come into effect once you switch to TNBN. You may cancel at any time leading up to 48 hours before your connection date and may cancel at any time once connected by providing 31 days written notice by email info@tnbn.co.uk or by recorded delivery letter to our current address on the contact us page.

Let’s get started with CallGenie

Your Details
Please note: If you choose "direct debit" or "BACS" we will be in contact to set you up.
Please let us know if we can contact you regarding the following services.

By submitting this form you are agreeing to our privacy policy. We never sell your information to any third parties.

If you experience any issues signing up or require any further information please call us on 0800 019 5562 – Monday to Friday from 9am – 5pm

Last bill with BT


New bill with TNBN


Yearly savings


Great Marlow School

Other fantastic reasons to Join TNBN – It’s not just about savings but a superb service.

  • Personnel account manager

  • Leading 31 day rolling contract with no penalty charges if you cancel when providing notice

  • UK Landline, Mobile and International calls 50% less

  • Exceptional UK based customer service team

  • Main line faults can be diverted to available landlines or mobiles ensuring continuity of service

  • Free to join

  • Monthly paperless billing by TNBN with full reports and analyst stats

  • Pay by cheque, Bacs or direct debit payments

  • Standard Line Faults fixed by Openreach on behalf of TNBN with 24 hours

TNBN has a full code of practise with Ofcom. We are members of The Ombudsman Services. We have the recommended EU £5 liability insurance to operate within educational sites across the UK as well as holding £100,000 indemnity insurance.

Disclaimer: Whilst CallGenie will do its best to reduce your UK landline, mobile and International calls by 50% and landlines by 10% we cannot always guarantee this service. If CallGenie fails to offer you the reductions as per this website offer we will make you our next best offer. Should you not wish to proceed when you receive your email with the confirmed rates please feel free to reply back and cancel the service before it goes live. If you opt to pay by cheque there is a £5 per month admin fee.