https://community.talktalk.co.uk/t5/Mobile/mobile-phone-contacts-problem/m-p/3094498#M47939 <P>yesterday, when I tried to call one of my contacts, the notice "not registered on network " came up. as I haven't a clue why this should happen I don't know. I called or texted at least 6 people last week. Why do I need to register numbers I have used for years? Is it talktalk or Tesco mobile I need to speak to?</P> Wed, 29 Jan 2025 09:03:07 GMT Buttsie1944 2025-01-29T09:03:07Z https://community.talktalk.co.uk/t5/Mobile/mobile-phone-contacts-problem/m-p/3094498#M47939 <P>yesterday, when I tried to call one of my contacts, the notice "not registered on network " came up. as I haven't a clue why this should happen I don't know. I called or texted at least 6 people last week. Why do I need to register numbers I have used for years? Is it talktalk or Tesco mobile I need to speak to?</P> Wed, 29 Jan 2025 09:03:07 GMT https://community.talktalk.co.uk/t5/Mobile/mobile-phone-contacts-problem/m-p/3094498#M47939 Buttsie1944 2025-01-29T09:03:07Z https://community.talktalk.co.uk/t5/Mobile/mobile-phone-contacts-problem/m-p/3094501#M47940 <P>If you called using your mobile you need to speak to your mobile supplier</P> Wed, 29 Jan 2025 09:08:02 GMT https://community.talktalk.co.uk/t5/Mobile/mobile-phone-contacts-problem/m-p/3094501#M47940 Arne-TalkTalk 2025-01-29T09:08:02Z