@Mcwlsh : If it's a recent upgrade it can't be unlocked until it's over 6 months old.
If it's not so recent, for you to unlock a 2nd-hand phone you need to call Customer Services on +44 800 956 6000 (option 2, option 4) to put you in touch with the Unlocking Team to request an Unlock Code. You will be asked for your email addy. They will take payment (of £8.99) from any valid UK bank card.
Once the process has been started you will receive an email from the Unlocking Team to process the unlock. It can take up to 10 days to complete the unlock.
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To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Mobile Phone & Mobile Broadband or Option 2 for Home Broadband & Home Phone
ISPs: 1999: Freeserve 48K Dial-Up > 2005: Wanadoo 1 Meg BB > 2007: Orange 2 Meg BB > 2008: Orange 8 Meg LLU > 2010: Orange 16 Meg LLU > 2011: Orange 20 Meg WBC > 2014: EE 20 Meg WBC > 2020: EE 40 Meg FTTC > 2022:EE 80 Meg FTTC SoGEA > 2025 EE 150 Meg FTTP
