Mobile Phone systems for Plumbers
STOP LOSING BUSINESS TO
MISSED CALLS!
Plumbers using ONSIM win 3x more jobs by answering more calls and securing more work—effortlessly.
ONSIM can be tailored for plumbers—a professional phone system with a landline number, all natively ON-A-SIM.
Stay connected, book more jobs, and grow your business with a simple, reliable mobile solution.
Thinking outside the toolbox
Tailored Phone Solutions for Plumbers
Key Features Built for Your Business:
Get all the benefits of a full-featured office phone system—right in your pocket. With ONSIM, you stay connected wherever you go, without the hassle of apps or call diverts.
Landline Caller ID
Make and receive calls from your mobile while displaying a professional landline number—no apps needed.
Seamless Call Transfers
Easily transfer calls to other landline or mobile numbers without hanging up, ensuring smooth customer interactions.
Work as a Team
When a customer calls your landline, ONSIM can route the call to multiple team members. Plus, everyone can display the same business number when dialling out.
Smart Call Handling
Set up advanced diverts based on working hours, send calls to voicemail, or have a professional assistant answer your calls 24/7. With ONSIM, you’ll never miss an opportunity to grow your business.
What our customers say.
" One of the best services I have ever received! "
Mubasher
Small business owner
" Amazing company the service is second to none! Support staff are great and have helped me so much. Really polite and helpful. "
Smith & Sullivan Ltd
Small business owner
" My name is John Morrison I have two businesses and the staff at ONSIM were brilliant.....instant replies and very polite couldn't ask for more from them. Thanks for everything "
John Morrison
Small business owner
Still have doubts?
What is a landline SIM?
A landline SIM is like a regular mobile SIM card from other mobile networks but with a landline number (01,02,03,08,etc) instead of a mobile number (07). When you dial out the person you call will see your landline number not a mobile number and when someone calls you on your landline number it rings straight through to you - it's not a divert or trick, there are no apps to install it works just like a regular mobile SIM.
Can I have a landline and a mobile number?
Yes – 2 numbers, 1 phone!
You can use your mobile phone to answer calls on your existing landline number and your mobile number, without needing a second phone. Giving you the flexibility of a mobile with the professionalism of a landline number—no need to carry multiple devices.
Can I use an existing landline or mobile number?
Yes – you can transfer (port) your current landline or mobile number to our service. This way, your customers can keep calling the same number they already trust, but you’ll have the flexibility to take those calls wherever you are.
What number is displayed to the person I'm calling?
You can set the caller ID to any number you own. Landline or Mobile.
How would using a landline SIM benefit me/my company?
Stay professional: Use a trusted landline number on your mobile.
Never miss a call: Answer landline calls anywhere you are.
Work smarter: Transfer or forward calls with ease.
Save money: Combine landline and mobile in one device.
Keep your number: No disruption for your customers.
"More calls answered = more jobs won."
Are there any other features?
Yes. Loads! We can provide everything you would need from a traditional office phone service but without the high cost and poor quality – our support team are on hand to talk you through the solutions we can provide and answer any questions you may have.
Is this VoIP?
No – VoIP uses the internet to make and receive calls, which means you need a reliable internet connection. ONSIM uses mobile networks, so calls come through just like on your mobile. No internet, apps or Wi-Fi required.
What's the cost?
Our base plan is just £10/month including unlimited calls and SMS – we also offer a wide range of mobile data bundles to suit every budget.
Flexible pricing plans
BASE
- UNLIMITED UK Calls & SMS**
- Standard or eSIM
- Advanced Features
- UK Data Bundles (2GB,4GB,10GB,20GB,40GB @ £2,£4,£6,£8,£10)
- Pick new Landline or use existing
- Cancel any time
- Trusted by 5,000+ UK businesses
Enterprise
Tailored solutions for medium-large businesses (prices from)
- Free no obligation quote
- Custom pricing options
- Mobile Call recording
- Mobile Data Options (shared or wholesale)
- International Numbering
- Global Network
Want to speak to our sales team? Call us now on +443338804008
All prices shown are ex VAT**UK Mins are outbound calls to major (O2, Vodafone, EE and Three) UK mobiles (07), landlines (starting 01, 02, 03) and freephone numbers (0800, 0808). Unlimited call and SMS allowances are subject to our fair usage policy (5,000 mins and 1,000 SMS). Usage outside of these allowances are charged at 5p/min & 5p/sms. By default we only allow calling to inclusive numbers (excluding non-standard 07 numbers) to avoid incurring additional charges. You can request that these restrictions are removed at our sole discretion.