Gamma Phoneline+ was built for one job: to give micro-businesses, sole traders, and small offices an easy, affordable path away from a traditional landline before the January 2027 PSTN switch-off deadline. It makes no attempt to compete with Horizon or Webex on feature depth — and for the businesses it serves, it doesn't need to. For a business that just needs a reliable, professional phone number that works on a mobile app and optionally a desk phone, Phoneline+ delivers everything required at the lowest price point on this page.
The pricing model is per-line rather than per-user — you pay for the number of business lines you need, regardless of how many staff share them. Unlimited UK calls are included. Voicemail-to-email transcription means missed calls land in your inbox as readable messages. The mobile app keeps personal and business calls completely separate on the same handset — something many small business owners find immediately valuable.
For businesses that have been putting off their PSTN migration because a full phone system feels disproportionate to their needs, Phoneline+ removes every barrier. There is no hardware to order, no engineer to book, and no complex configuration to complete. You sign up, port your existing number if you want to keep it, and you're live — often the same day.
Use cases
Gamma Phoneline+ is best for
✓
Sole traders and micro-businesses
Any business with 1–15 staff needing a professional business phone number and basic call handling.
✓
Fast PSTN migration
Businesses needing to be off their traditional landline quickly, with same-day activation and a straightforward number porting process.
✓
Home-based workers
Anyone wanting a dedicated business number on their mobile that keeps personal and business calls completely separate.
✓
Seasonal or low-volume businesses
Per-line pricing is ideal for businesses with unpredictable call volumes where per-user models would feel wasteful.
✓
Businesses that need a basic PSTN replacement without over-engineering it
If you have one or two PSTN lines and basic call handling needs, Phoneline+ replaces them without overcomplication.
Key capabilities
Core features
📱
Mobile app
iOS and Android app — business and personal calls completely separate on one phone.
📧
Voicemail to email
Missed call voicemails delivered as audio files and text transcriptions to your inbox.
🔢
Number porting
Keep your existing business number — T2K manages the porting process end-to-end.
☎️
Unlimited UK calls
No usage caps on standard UK landline and mobile calls — predictable monthly cost.
🔀
Hunt groups (Office tier)
Basic hunt groups to ring multiple users from a single number on the Office tier.
✅
Same-day activation
New numbers active the same day. Porting an existing number takes 10–15 working days.
Strengths
Lowest monthly cost
Simplest possible setup
Keeps your existing number
Mobile app for iOS and Android
Unlimited UK calls included
Same-day activation available
Limitations
No call recording
No CRM integration
No video conferencing
Limited scalability beyond ~50 staff
Basic call handling only
No contact centre capability
Technical specifications
Full specifications
Deployment
Cloud only
Best suited for
1–50 users
Pricing model
Per line / month
Mobile app
✓ iOS & Android
Unlimited UK calls
✓ Included
Voicemail to email
✓ Included
Number porting
✓ Keep your existing number
Hunt groups
Office tier only
Call recording
Not available
CRM integration
Not available
Video conferencing
Not available
IT resource required
✓ Not required
PSTN replacement
✓ Ideal PSTN replacement
Side-by-side
How Gamma Phoneline+ compares
Head-to-head comparison
vs Gamma Horizon
Horizon is the right next step when your business grows beyond basic telephony — call queues, CRM integration, call recording, and auto-attendant are all available on Horizon's tiered plans. Phoneline+ is the right starting point for businesses that genuinely only need the basics.
vs Voiceflex Flow
Flow is a full UCaaS platform for businesses wanting Teams integration, contact centre, and enterprise UC. Phoneline+ serves businesses that haven't reached that stage yet or don't need that level of capability.
vs 3CX
3CX offers a full PBX with video, CRM integration, and contact centre features. If you're outgrowing Phoneline+ and need more capability, 3CX is a natural next step — particularly if concurrent-call pricing suits your usage pattern.
Yes. Gamma Phoneline+ supports full number porting — your existing geographic number can be transferred. T2K manages the porting process on your behalf. The process typically takes 10–15 working days.
A new number on Gamma Phoneline+ can be active the same day in most cases. Porting an existing number from another provider takes 10–15 working days as the previous provider must release the number.
Phoneline+ is best suited to businesses with up to around 15–20 staff. The Office tier supports basic hunt groups for small teams. If you have more complex call handling requirements, Gamma Horizon would be more appropriate.
Yes. The Phoneline+ mobile app for iOS and Android lets you make and receive business calls on your mobile, keeping business and personal numbers completely separate. Voicemail transcriptions are delivered to your email inbox.
Yes. Phoneline+ is a fully IP-based service — it replaces your traditional landline with a cloud-hosted number that works over your broadband connection. It is one of the simplest compliant solutions available for the PSTN switch-off deadline.
Further reading
Resources & related content
Guides, comparisons and case studies to help you go deeper on Gamma Phoneline+.
Speak with the T2K VoIP team for a no-obligation consultation, a tailored quote, and a clear migration plan. We handle everything from number porting to hardware and go-live support.
