https://community.o2.co.uk/t5/Other-Products-and-Services/My-phone-does-not-work/m-p/1822561#M55735 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/5182561">@NicolaSmith</a>&nbsp;</P><P>Are you using your old sim or have you activated your new sim?</P><P><LI-PRODUCT title="Guide: Sim Swap: a mini guide 2017 update" id="Guide012"></LI-PRODUCT>&nbsp;</P><P>You can message O2 on Social Media. Facebook or <SPAN class="">Instagram </SPAN><A href="https://www.o2.co.uk/abouto2/social-media" target="_blank" rel="noopener">https://www.o2.co.uk/abouto2/social-media</A>&nbsp;if needed or go in store with photo ID.</P> Sat, 20 Dec 2025 18:25:10 GMT MI5 2025-12-20T18:25:10Z https://community.o2.co.uk/t5/Other-Products-and-Services/My-phone-does-not-work/m-p/1822555#M55734 <P>Hi&nbsp;</P><P>I have recently upgraded but I can not make or take a single call! There is bars showing as signal but it never works&nbsp;</P><P>I can’t even answer a call to o2 to try and get the issue fixed</P> Sat, 20 Dec 2025 18:00:53 GMT https://community.o2.co.uk/t5/Other-Products-and-Services/My-phone-does-not-work/m-p/1822555#M55734 NicolaSmith 2025-12-20T18:00:53Z https://community.o2.co.uk/t5/Other-Products-and-Services/My-phone-does-not-work/m-p/1822561#M55735 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/5182561">@NicolaSmith</a>&nbsp;</P><P>Are you using your old sim or have you activated your new sim?</P><P><LI-PRODUCT title="Guide: Sim Swap: a mini guide 2017 update" id="Guide012"></LI-PRODUCT>&nbsp;</P><P>You can message O2 on Social Media. Facebook or <SPAN class="">Instagram </SPAN><A href="https://www.o2.co.uk/abouto2/social-media" target="_blank" rel="noopener">https://www.o2.co.uk/abouto2/social-media</A>&nbsp;if needed or go in store with photo ID.</P> Sat, 20 Dec 2025 18:25:10 GMT https://community.o2.co.uk/t5/Other-Products-and-Services/My-phone-does-not-work/m-p/1822561#M55735 MI5 2025-12-20T18:25:10Z