Keep your personal mobile number private.Like an email alias, but for a real UK 07 mobile line on your existing phone.
You already protect your email with aliases and password managers—yet your single mobile number is handed to every courier, website, WhatsApp group, and public database. Add a permanent, carrier-backed UK number via eSIM in 60 seconds. From £5/mo billed yearly.
Close family, UK banking & 2FA (Monzo, Barclays, Revolut), HMRC, Apple/Google ID recovery. Zero exposure to data breaches or spam lists.
Secondary WhatsApp, online checkouts, courier deliveries, property/car enquiries, client contact, and loyalty signups. Mute anytime.
Why using one mobile number for everything is a privacy risk
Permanent Identity Key
Unlike an email address that you can alias in seconds with Proton Pass, SimpleLogin, or Apple Hide My Email, your UK mobile number acts as a permanent universal identifier across data brokers, credit profiles, and social graphs.
WhatsApp Number Exposure
Every time you join a community, school, neighbourhood, or event WhatsApp group—or message a buyer, tradesperson, or acquaintance—your personal 07 number is visible to everyone in the thread.
Retail & Courier Data Leaks
Online checkouts force you to enter a valid mobile number for delivery updates. When a merchant or marketing database suffers a breach, that same number is targeted with automated smishing and nuisance calls.
2FA & Banking Surface Area
Using the exact same publicly searchable phone number for your UK banking 2FA, HMRC login, and primary email recovery gives attackers a known target for social engineering and phishing.
Two proven ways to compartmentalise your phone
Because SecondSim installs directly onto your phone's Dual-SIM hardware on the Vodafone UK network, both lines remain active simultaneously with zero battery drain.
Use SecondSim for the outside world
Keep your existing mobile number strictly for family and close friends. Give your SecondSim UK 07 number to everything else:
- →Second WhatsApp account: Run a private WhatsApp profile for community groups, acquaintances, or online dating without exposing your primary number.
- →Online shopping & couriers: Enter your SecondSim number on retail checkouts, DPD/Evri/Royal Mail tracking, and restaurant bookings.
- →High-spam enquiries: Enquire about properties on Rightmove, cars on AutoTrader, tradespeople quotes, or marketplace listings without weeks of follow-up calls on your personal line.
Use SecondSim as a secret banking & 2FA line
If your main mobile number has already been in circulation for a decade and appears in old data breaches, create a clean vault line that nobody knows exists:
- →Dedicated UK Bank & FinTech 2FA: Register Barclays, Monzo, Revolut, HSBC, Vanguard, and interactive investor to a private UK 07 number never shared with any person or website.
- →Account Recovery Isolation: Lock down Apple ID, Google Workspace, Proton, 1Password, and HMRC Government Gateway SMS recovery codes.
- →Free global inbound SMS: Receive 2FA verification texts anywhere in the world at no extra cost while travelling.
Why "privacy number apps"
fail in the real world.
Virtual number apps (such as MySudo, Cloaked, Hushed, or Vyke) route traffic over internet VoIP proxies. Banks, WhatsApp, and marketplaces automatically detect and block VoIP ranges—while the app itself demands invasive permissions on your phone.
| Privacy & Security Criteria | SecondSim UK eSIM CARRIER NATIVE | VoIP Privacy Apps (MySudo / Vyke / Cloaked) | Free Online SMS Sites |
|---|---|---|---|
| UK Number Classification | ✓ Genuine UK 07 Cellular (Vodafone) | ✗ Flagged as Virtual / VoIP range | ✗ Blacklisted public range |
| WhatsApp, Banking & HMRC 2FA | ✓ Passes HLR carrier lookup checks | ✗ Routinely rejected or banned | ✗ Blocked immediately |
| Third-party app on your phone | ✓ None — uses native iOS/Android OS | ✗ Requires app with mic & contact access | Web browser only |
| Message & OTP Exclusivity | ✓ 100% private, dedicated SIM line | ✓ Private to app account | ✗ Publicly visible to anyone online |
| Works without Wi-Fi / Mobile Data | ✓ Yes (Standard mobile mast signal) | ✗ Fails when data drops | ✗ Requires internet |
| Ofcom Number Ownership & Porting | ✓ Full PAC portability rights | ✗ Locked inside proprietary app | ✗ None |
Keep your private line for £5/month.
Unlimited UK calls & texts on every plan. Instant eSIM delivery via email. Works with Proton, SimpleLogin & Apple Hide My Email addresses.
Rolling monthly — cancel anytime.
- Dedicated UK 07 mobile number (non-VoIP)
- Full WhatsApp & UK bank 2FA compatibility
- Unlimited UK voice calls & SMS
- Instant digital eSIM delivery in 60s
- Zero third-party apps required
Set-and-forget security. Works out at £5/mo — 2 months free vs monthly.
- Dedicated UK 07 mobile number (non-VoIP)
- Permanent line for Banking, HMRC & WhatsApp
- Unlimited UK voice calls & SMS
- Free inbound 2FA SMS worldwide
- 2 months FREE vs monthly billing
The balanced choice — save 11%.
- Dedicated UK 07 mobile number (non-VoIP)
- Full WhatsApp & UK bank 2FA compatibility
- Unlimited UK voice calls & SMS
- Instant digital eSIM delivery in 60s
- Save 11% vs monthly
Deep-dive privacy playbooks
Step-by-step guides to locking down your personal mobile number on iOS and Android.
Why WhatsApp still exposes your 07 number in chats and how to run a private second profile on the same phone.
2FA & Banking Security Why You Should Use a Dedicated UK Number for Banking & 2FA →How isolating your bank, HMRC, and password manager 2FA onto an unshared eSIM protects you from data breaches and phishing.
Instant eSIM Setup How to Get a UK Number Without a Physical SIM Card →Activate a second Vodafone-backed UK line in 60 seconds with no postal wait or plastic SIM swap.
Privacy number questions,
answered plainly.
Have a specific setup question? Email our UK team.
Why use an eSIM for phone number privacy instead of a virtual number app?+
App-based virtual numbers (such as MySudo, Cloaked, or Vyke) use VoIP ranges that are routinely blocked by WhatsApp, UK banks, HMRC, and verification systems. They also require installing third-party apps with access to your microphone and contacts. SecondSim installs as a native hardware Dual-SIM profile on Vodafone's UK network—requiring zero third-party apps and passing all carrier checks.
Should I use my SecondSim number as my public shield or my private 2FA vault?+
Both strategies work seamlessly. If your primary number has already been shared widely over the years, many security-conscious users move their banking, HMRC, and email recovery 2FA onto a clean SecondSim number that is never shared publicly. Alternatively, you can keep your primary number strictly for family and use your SecondSim number for WhatsApp groups, online orders, couriers, property enquiries, and public forms.
Can I sign up using a Proton Pass, SimpleLogin, or Apple Hide My Email address?+
Yes. We welcome privacy-conscious customers using Proton Mail, Proton Pass aliases (@passmail.net), SimpleLogin, Apple Hide My Email, Tuta, and DuckDuckGo email addresses. Your eSIM QR code and 1-click install link are delivered directly to your alias inbox within 60 seconds of checkout.
Can I use a private SecondSim number to hide my personal number on WhatsApp?+
Yes. Because WhatsApp reveals your phone number in every 1-to-1 chat and many group chats, registering a second WhatsApp or WhatsApp Business account on your SecondSim eSIM lets you message clients, school/community groups, or marketplace buyers without exposing your personal mobile number.
Does my SecondSim number stay permanently mine if I rarely make calls?+
Yes. Many of our customers keep their line almost entirely idle—using it solely to receive occasional 2FA verification texts or WhatsApp messages. As long as your monthly, quarterly, or yearly subscription remains paid and active, your number is never recycled or suspended for low usage.
Protect your personal number in 60 seconds.
Real Vodafone UK 07 mobile line. Zero third-party apps. Cancel anytime.
Get Your Private UK Number