https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663111#M265794 <P>Then see other two possibilities above.</P> Fri, 27 Oct 2023 16:24:53 GMT MI5 2023-10-27T16:24:53Z https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663094#M265789 <P>got 2 telephones both samsung&nbsp; when changing the sim from old one to new one it comes up on the phone NO SIM why wont the sim work in one but not the other .ta</P> Fri, 27 Oct 2023 15:46:47 GMT https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663094#M265789 oldsod 2023-10-27T15:46:47Z https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663096#M265790 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/2633575">@oldsod</a>&nbsp;</P><P>Either incorrectly installed sim or faulty sim reader.</P><P>If the new phone is dual sim, make sure you're using sim slot 1.</P> Fri, 27 Oct 2023 15:54:21 GMT https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663096#M265790 MI5 2023-10-27T15:54:21Z https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663100#M265791 <P>No both have only one sim slot ,&nbsp;</P><P>&nbsp;</P> Fri, 27 Oct 2023 16:01:13 GMT https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663100#M265791 oldsod 2023-10-27T16:01:13Z https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663111#M265794 <P>Then see other two possibilities above.</P> Fri, 27 Oct 2023 16:24:53 GMT https://community.o2.co.uk/t5/Pay-Monthly/sim/m-p/1663111#M265794 MI5 2023-10-27T16:24:53Z