| Issue | Solution | |-------|----------| | “Password incorrect” | Try 0000, 1919, or 1234. If none work, contact O2. | | “Network error” | Turn on airplane mode for 10 sec, then try again. | | Barring still active after removal | Restart your phone; barring is network-based, but a refresh helps. | | Codes don’t work | Your phone may strip leading # – enter manually, don’t copy-paste. |
If you cannot find the menu settings, you can use universal GSM codes to reset barring. Enter these into your phone's dial pad as if making a call: how to remove call barring o2
If you lost your barring password or codes don’t work: | Issue | Solution | |-------|----------| | “Password
Sometimes, if your phone was reported lost or stolen previously, O2 puts a block on the SIM. | | Barring still active after removal |
If you are using an iPhone, the codes above work, but you can also use the menu: