Freezeline
First aid for phone theft and fraud.
Numbers verified against official sources Free & independent — no signup

Tesco Mobile: block your SIM after phone theft

Your SIM receives the security codes that protect your bank and email. Until it’s blocked, the thief receives them. Here’s the fastest way in, from any borrowed phone.

1. Report it to Tesco Mobile

📞 Call Tesco Mobile: 0345 301 4455
Say thisMy phone was stolen. Please block the SIM and my number immediately, and put a port-out and SIM-swap lock on my account. I’ll need my number back on a new SIM or eSIM as soon as you can verify me.

Checked 2026-06-12 against the official website. Spotted a change? It will be corrected in the next quarterly sweep.

Out of normal hours, call anyway and follow the out-of-hours instructions. Pay monthly customers can also block via My Account online. Replacement SIM posted within 3 days, keeping your number.

This line is not 24/7 — if it’s out of hours, do the bank freezes and email lockdown first, then come back.

The other calls that can’t wait

  1. Every other bank on that phone — including every card ever added to Apple Pay or Google Pay. Dial 159 to reach each bank’s fraud team.
  2. Your mobile network — block the SIM so the thief stops receiving your security codes.
  3. Your email — change the password, sign out all devices, then remove any forwarding rules or connected apps the thief planted.
  4. Police — 999 if it just happened, otherwise 101 or online. Get the crime reference number.

Your phone held more than one account

Banking apps, wallet cards, email, your number — they all need action, in the right order. The free Freezeline wizard asks five questions and builds your personalised plan: every number, what to say, and why in that order.

Get my emergency plan →

Free. No signup. Works on a borrowed phone.