https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626318#M63609 <P>Yes, but you'll probably have to change your data settings.</P> Wed, 12 Feb 2014 09:50:44 GMT Bambino 2014-02-12T09:50:44Z https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626308#M63606 <P>I have just upgraded from iphone 4s to Sony Xperia which both use micro sims. Can I just put my old sim into the new phone?</P> Wed, 12 Feb 2014 09:34:55 GMT https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626308#M63606 Anonymous 2014-02-12T09:34:55Z https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626318#M63609 <P>Yes, but you'll probably have to change your data settings.</P> Wed, 12 Feb 2014 09:50:44 GMT https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626318#M63609 Bambino 2014-02-12T09:50:44Z https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626338#M63617 Thank you Wed, 12 Feb 2014 10:30:03 GMT https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626338#M63617 Anonymous 2014-02-12T10:30:03Z https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626372#M63623 Yes and you should get O2 to change you to a standard data bolt on and not an iphone one Wed, 12 Feb 2014 11:13:51 GMT https://community.o2.co.uk/t5/Pay-Monthly/Using-old-sim/m-p/626372#M63623 Anonymous 2014-02-12T11:13:51Z