PAC Code Transfer Guide

Switch from iD Mobile to Tesco Mobile and keep your number

Written by: SIM Only Finder Editorial Team

Last reviewed: 11th July 2026

Switch from iD Mobile to Tesco Mobile and keep your number

Written by: SIM Only Finder Editorial Team

Last reviewed: 11th July 2026

This guide explains how to switch from iD Mobile to Tesco Mobile and keep your mobile number.

Most number transfers complete within 1 to 2 working days once Tesco Mobile has your PAC code.

If you want a new number instead, text STAC to 75075 and give the code to Tesco Mobile.

This switch will take you from Three's network to O2's network. Coverage may differ in some areas. Check Tesco Mobile's coverage checker before switching.

Joining Tesco Mobile and leaving iD Mobile

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To keep your number, request a PAC code from iD Mobile and give it to Tesco Mobile.

You can usually give Tesco Mobile your PAC code when you order, or after your new SIM card or eSIM has been activated.

1. Request a PAC code from iD Mobile

Here is how to get your PAC (Porting Authorisation Code) from iD Mobile:

  • Text: Text "PAC" followed by your date of birth as DDMMYY to 65075 from your iD Mobile phone (for example, PAC 010190). You will get a text back with your code within a minute. This is a free service from Ofcom (the UK's communications regulator).
  • Online: Log in to the iD Mobile app or My Account online and go to Plan, then Leave iD, then Get PAC Code.
  • Phone: Call 0333 003 7777 and follow the cancellations options. You will need your iD customer service PIN from your welcome text or email.

Your iD Mobile data rollover balance is lost when you leave. It cannot be transferred or refunded.

2. Order a SIM only deal from Tesco Mobile

If you have not ordered yet, compare current Tesco Mobile SIM only deals below.

Current Tesco Mobile SIM only deals

View more Tesco Mobile deals
Tesco Mobile SIM Card 5G
Tesco Mobile SIM or eSIM 12 month contract
6 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £6.00
See Deal Sold by Tesco Mobile
Monthly Price increases to £6.36 on 1st April 2027 Powered By: O2 Order your SIM then swap to eSIM EU roaming included
Tesco Mobile SIM Card 5G
Tesco Mobile SIM or eSIM 24 month contract
2 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £7.50
See Deal Sold by Tesco Mobile
Monthly Price increases to £7.95 on 1st April 2027 and to £8.42 on 1st April 2028 Powered By: O2 Order your SIM then swap to eSIM EU roaming included
Tesco Mobile SIM Card 5G
Tesco Mobile SIM or eSIM 12 month contract
2 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £8.00
See Deal Sold by Tesco Mobile
Monthly Price increases to £8.48 on 1st April 2027 Powered By: O2 Order your SIM then swap to eSIM EU roaming included

If you already have your new SIM, continue to Step 3.

If Tesco Mobile asks for your PAC code during checkout, enter it there. If not, wait for your new SIM or eSIM to activate, then give Tesco Mobile the PAC code using the method below.

Tesco Mobile's Clubcard Price deals are cheaper and price-frozen for the contract, so link a Clubcard before you order.

Tesco Mobile offers eSIMs, so you can switch without waiting for a physical SIM to arrive.

3. Give the PAC code to Tesco Mobile

Once you have your PAC code, here is how to give it to Tesco Mobile:

  • Text: Text "Port" to 23424 from your Tesco Mobile SIM and follow the instructions that come back by text.
  • Online: Use the web chat on Tesco Mobile's website to hand over your PAC code.
  • Phone: Call 4455 from your Tesco Mobile phone or 0345 301 4455 from any other phone.
  • In-store: Visit a Tesco Mobile store and ask to switch your number to Tesco Mobile.

4. Wait for your number transfer to Tesco Mobile to complete

Tesco Mobile will send the transfer request to iD Mobile.

Your number should move to your new Tesco Mobile SIM within 1 to 2 working days.

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