How to Unmask Private Calls on giffgaff, Sky Mobile, iD Mobile, Smarty & Lebara

Full Support for UK MVNO Networks (November 2026)

Millions of UK mobile users rely on Mobile Virtual Network Operators (MVNOs) for flexible, high-value plans. Because these providers piggyback on the four core British networks (O2, Three, Vodafone, and EE), they support the conditional call forwarding protocols used by PrivStop to unmask hidden callers.

How Each UK MVNO Routes Declined Calls

• giffgaff & Sky Mobile (O2 Network): Fully compatible with instant GSM conditional forwarding shortcodes provided in your PrivStop dashboard.
• iD Mobile & Smarty (Three Network): Supports rapid call diversion when you reject an incoming "No Caller ID" call.
• Lebara (Vodafone Network): Natively routes declined private calls to our London unmasking nodes in under a second.

3-Step Activation

1. Create your account at PrivStop and choose your mobile network from the selector.
2. Tap or dial the one-click activation shortcode on your phone's keypad.
3. Press Decline whenever a private number rings—we will immediately text and push-notify you with their real phone number.

Related UK Unmasking Guides: Read our UK MVNO Compatibility Guide (giffgaff, Sky Mobile, iD Mobile, Smarty & Lebara), compare UK TrapCall alternatives, or browse all 2026 UK telecom research reports.