Get a real UK mobile number on your existing phone.Keep your current number. Add a second number via eSIM.
From £5.99/month. No second handset required. Live in 60 seconds.
How two active mobile lines run on one handset
Dual SIM Dual Standby (DSDS)
Modern smartphones contain dual cellular baseband controllers. Both your primary SIM and your SecondSim eSIM remain continuously active on standby to receive inbound calls and SMS messages at any second.
Colour-Coded Native Dialler
Your phone tags every incoming call with line identifiers (e.g. 'P' for Primary, 'S' for Second Line). Choose which number to dial out from with one tap, or assign default lines to specific business contacts.
Distinct Ringtones & Voicemail
Assign custom tones to your secondary line so you recognise customer enquiries before looking at the screen. Separate voicemail greetings keep work callers professional while your personal inbox stays private.
Smart Cellular Data Toggling
Retain your existing unlimited data plan on your primary SIM. SecondSim functions purely for voice and SMS routing over cellular masts, eliminating unnecessary data costs and avoiding battery drain.
Why carrying two physical phones is no longer necessary
Save £300–£800 on device costs
Buying a second handset just to answer business calls wastes cash on duplicated screens, batteries, and insurance. An eSIM activates directly on your premium handset for £5.99/mo.
One device, one charger, zero hassle
Stop carrying two bulky devices in your jacket or searching for separate charging cables. Both phone numbers live inside your single daily device with unified battery efficiency.
Turn off work without losing access
Unlike carrying a second handset that tempts you to check emails all evening, iOS and Android allow you to schedule or toggle your second line off, giving you complete personal peace.
What do you need a second number for?
Explore our specialized landing pages for tailored guides, compatibility lists, and direct setup steps.
Run two WhatsApp accounts on one phone. Satisfies carrier mobile checks natively without VoIP flags or account bans.
Teams & Small Business B2B & Team Management →Deploy dedicated company numbers to staff devices instantly without buying expensive company handsets or managing contracts.
Security & 2FA Codes Banking & SMS Verification →Receive 2FA security codes from UK banks, HMRC, Stripe, and marketplaces that block virtual or VoIP numbers.
Expats & Travel Remote & Expat Connectivity →Maintain an authentic UK mobile presence anywhere worldwide with free incoming SMS and zero international roaming fees.
Everyday privacy, professional boundaries, and freedom
1. Work & Personal Separation
Protect your family time. Give clients your dedicated second number, set business operating hours, and silence calls in the evening while leaving your personal phone line completely accessible to friends and loved ones.
2. Privacy & Online Listings
Listing a vehicle on AutoTrader, selling furniture on Gumtree, or registering a company at Companies House? Use your second number to shield your personal mobile from marketing databases, cold callers, and web scrapers.
3. Remote & Expat Connectivity
Living abroad or travelling as a digital nomad? Keep your UK banking apps, government gateways, and client communications active without maintaining an overpriced UK high street mobile contract or worrying about SIM expiry.
SecondSim Dual-SIM vs
Two Phones vs VoIP Apps.
See how a native dual-SIM mobile eSIM compares against carrying two physical handsets or relying on internet VoIP software apps.
| SecondSim eSIM RECOMMENDED | Two Physical Handsets | Virtual VoIP Apps | |
|---|---|---|---|
| Handsets in pocket | 1 device (Dual-SIM) | 2 devices to carry & charge | 1 device (App-based) |
| Network technology | Physical Cellular Baseband | Physical Cellular Baseband | VoIP SIP software proxy |
| Hardware expense | £0 (Uses existing phone) | £250–£800+ for 2nd phone | £0 (Uses existing phone) |
| Call audio quality | HD Mobile Voice (Vodafone) | HD Mobile Voice | Variable — suffers packet jitter |
| Works without mobile data | ✓ Yes (Standard mobile signal) | ✓ Yes (Standard mobile signal) | ✗ No — requires stable 4G/Wi-Fi |
| WhatsApp & Bank 2FA | ✓ Native UK 07 mobile network | ✓ Standard mobile | ✗ Blocked by bank security filters |
| Monthly commitment | £5.99/mo — cancel anytime | 12–24 month network contract | £8–£20/mo + pay-per-minute |
SecondSim provides genuine UK 07 mobile network numbers operated by Serious People Ltd. Calls and texts route over Vodafone's physical cellular network towers.
One plan, three flexible options.
Unlimited UK calls & texts on every plan. No contract, no credit check, cancel anytime.
Pay as you go — cancel anytime.
- Real UK mobile number (non-VoIP)
- Full WhatsApp & bank 2FA compatibility
- Unlimited UK voice calls & SMS
- Instant digital eSIM delivery in 60s
- No long-term commitment, cancel anytime
Long-term peace of mind. Works out at £5/mo — 2 months free vs monthly.
- Real UK mobile number (non-VoIP)
- Full WhatsApp & bank 2FA compatibility
- Unlimited UK voice calls & SMS
- Instant digital eSIM delivery in 60s
- 2 months FREE vs monthly billing
The balanced choice — save 11%.
- Real UK mobile number (non-VoIP)
- Full WhatsApp & bank 2FA compatibility
- Unlimited UK voice calls & SMS
- Instant digital eSIM delivery in 60s
- Save 11% vs monthly
What our customers say about ditching the second phone
"I carried an iPhone for personal use and a cheap Android for business for four years. Heavy pockets and two chargers. Moving my work line onto SecondSim took two minutes. Everything is on one screen now."
"Listing equipment on eBay and Gumtree meant endless spam calls on my personal mobile. Getting an extra UK line protects my private number completely. When the sale ends, I never hear from strangers again."
"Clients used to message me on weekends while I was with my family. Setting up a dedicated second line let me create distinct work boundaries and custom ringtones. Easily the best £5.99 I spend each month."
Up and running in 3 simple steps.
Zero hardware shipping, no waiting for a plastic SIM card in the post. Your digital profile downloads directly to your device.
Dual-SIM & second number tutorials
Step-by-step guides for iOS and Android hardware configurations.
Second number questions,
answered plainly.
Still stuck? Talk to the team — we're a small UK operation.
Can I have two phone numbers on one iPhone or Android?+
Yes. Modern smartphones support Dual SIM Dual Standby (DSDS) technology via eSIM. You can maintain your primary physical SIM or eSIM alongside a dedicated SecondSim eSIM profile on one handset, keeping both lines connected and ready to receive calls and messages.
Is this a real UK 07 mobile number or a virtual VoIP app?+
SecondSim provisions genuine UK 07 mobile numbers on Vodafone's physical cellular network infrastructure. This is NOT a VoIP service, virtual proxy, or app-only dialler. Calls and SMS route through native cellular basebands, ensuring full reliability with WhatsApp and bank 2FA.
Will adding a second number affect my current mobile contract or SIM?+
No. Your existing mobile provider, physical SIM card, data allowance, and contract remain completely untouched. SecondSim operates as an independent, secondary cellular profile added directly into your device settings.
Can I use WhatsApp with this second UK number?+
Yes. Because SecondSim provides genuine UK mobile numbers on physical carrier infrastructure, it satisfies WhatsApp and WhatsApp Business verification checks natively. You can run personal WhatsApp and WhatsApp Business side-by-side on the same phone.
How does my phone know which number to call or text from?+
iOS and Android feature built-in dual-SIM controls. Incoming calls clearly display whether they are ringing your Primary or Secondary line. When making outbound calls or texts, you can toggle between lines with a single tap or assign default numbers to specific contacts.
How quickly is the second phone number delivered?+
Delivery is instant. As soon as you complete checkout, your eSIM profile is provisioned immediately. You receive a 1-click installation link and QR code by email, allowing you to be live on your phone in under 60 seconds.
Two numbers. One phone. Zero contracts.
Instant digital delivery. Unlimited UK calls and texts. Cancel anytime.
Choose Your Second UK Number