O2 UK Network issues on S25 Ultra - Airplane mode ...

Hellipsis · ‎14-01-2026

I am experiencing a persistent 'ghost signal' issue with my Samsung Galaxy S25 Ultra on the O2 network in the UK.

While the phone shows active signal bars, it frequently fails to register incoming calls (which go straight to voicemail without ringing) and cannot initiate outgoing calls.

This appears to be a network registration issue as the issue is only temporarily resolved by toggling Airplane Mode or restarting the device.

Any ideas?

MI5 · ‎14-01-2026

@Hellipsis

Try a new sim. Pop in store with photo ID.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
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