@O2 for the past 2 weeks my phone has been unable to make calls or receive calls. Swapped my husband's O2 SIM in and that worked. No joy with chat facility as it's always too busy to help!

@MrsLAFerguson1 We're sorry to hear this. Have you tested your sim card in your husband's phone as well? If yes, did you experience the same issue? Drop us a DM, we want to help.

@O2 DM sent, seems to be a SIM card issue.