https://community.o2.co.uk/t5/Pay-As-You-Go/Unlock-old-phone/m-p/1403993#M20083 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/4005557">@RoyDebonnaire</a>&nbsp;</P><P>How to unlock here <LI-PRODUCT title="Guide: Unlocking an O2 phone to use a different SIM card" id="Guide003"></LI-PRODUCT>&nbsp;</P><P>Please remove your phone number from your post by clicking on edit as the forum is public.</P> Sat, 31 Oct 2020 16:28:12 GMT MI5 2020-10-31T16:28:12Z https://community.o2.co.uk/t5/Pay-As-You-Go/Unlock-old-phone/m-p/1403991#M20082 <P>I have changed from using a PAYG sim card on a Samsung GT C3590 to a monthly contract with you with a new sim card on a Samsung Galaxy S8. I now want to use the old phone with a PAYG sim card from a different provider i.e. Asda. Having inserted the new sim in the old phone the phone tells me it is invalid. Please unlock the old C3590 so that I can use it. My mobile number which I have now moved to my new phone is [Removed]</P> Mon, 02 Nov 2020 17:42:53 GMT https://community.o2.co.uk/t5/Pay-As-You-Go/Unlock-old-phone/m-p/1403991#M20082 RoyDebonnaire 2020-11-02T17:42:53Z https://community.o2.co.uk/t5/Pay-As-You-Go/Unlock-old-phone/m-p/1403993#M20083 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/4005557">@RoyDebonnaire</a>&nbsp;</P><P>How to unlock here <LI-PRODUCT title="Guide: Unlocking an O2 phone to use a different SIM card" id="Guide003"></LI-PRODUCT>&nbsp;</P><P>Please remove your phone number from your post by clicking on edit as the forum is public.</P> Sat, 31 Oct 2020 16:28:12 GMT https://community.o2.co.uk/t5/Pay-As-You-Go/Unlock-old-phone/m-p/1403993#M20083 MI5 2020-10-31T16:28:12Z