PAC Code Transfer Guide

Switch from EcoTalk to Three and keep your number

Written by: SIM Only Finder Editorial Team

Last reviewed: 11th July 2026

Switch from EcoTalk to Three and keep your number

Written by: SIM Only Finder Editorial Team

Last reviewed: 11th July 2026

This guide explains how to switch from EcoTalk to Three and keep your mobile number.

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

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

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

Joining Three and leaving EcoTalk

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To keep your number, request a PAC code from EcoTalk and give it to Three.

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

1. Request a PAC code from EcoTalk

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

  • Text: Text "PAC" to 65075 from your EcoTalk phone. You will get a text back with your code within a minute. This is a free service from Ofcom (the UK's communications regulator).
  • Phone: Call EcoTalk on 033 3800 5500 from any UK phone.

2. Order a SIM only deal from Three

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

Current Three SIM only deals

View more Three deals
Three SIM Card 5G
Three SIM or eSIM 1 month contract
5 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £5.00
See Deal Sold by Three
Three SIM Card 5G
Three SIM or eSIM 12 month contract
30 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £7.00
See Deal Sold by Three
Monthly Price increases to £8.90 on 1st April 2027
Three SIM Card 5G
Three SIM or eSIM 12 month contract
15 GB Data
Unlimited Minutes
Unlimited Texts
Monthly £7.00
See Deal Sold by Three
Monthly Price increases to £8.90 on 1st April 2027

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

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

Three offers roaming in over 160 destinations through Go Roam, but on many plans this is a daily charge rather than an inclusion, so check your plan before ordering.

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

3. Give the PAC code to Three

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

  • Online: Enter your PAC code at checkout when you order, or fill in the number transfer form on Three's website afterwards.
  • Phone: Call 333 from your Three phone or 0333 338 1001 from any other phone.
  • In-store: Visit a Three store and a member of staff will transfer your number using your PAC code.

4. Wait for your number transfer to Three to complete

Three will send the transfer request to EcoTalk.

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

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