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My Samsung Galaxy S2 keeps saying not registered on network when I try to phone also a no entry sign where the signal bars should be keeps randomly appearing.

Does anyone know how to fix it or whats happening?

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It sounds like you may need to reset your APN settings, Your phone will be slightly different than mine, I'm using a Nexus 4. Try locating the following:

Settings -> Wireless & Networks -> Mobile Networks -> Access Point Names -> and from there locate the "Reset to default" option.

If that doesn't work, you can backup your device, and factory reset it.

  • I have got to access point names but can not find a reset to default option. – leelee21xo Mar 13 '13 at 17:38
  • i did have my phone unlocked from orange so i could put my vodafone sim in i dont know if that would effect it? but that was months ago and the phone has worked fine untill now. @Michael – leelee21xo Mar 13 '13 at 17:40
  • Try looking here, Menu > Settings > Wireless & Network > Mobile Network > Access Point Names > then press Menu, and look for the reset option. – Michael Mar 13 '13 at 18:02
  • ok found i have found it and reset it but it still says not registered on network, @michael – leelee21xo Mar 13 '13 at 19:49
  • In that case I would perform a factory reset – Michael Mar 13 '13 at 20:10

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