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Codau ardal ffôn

Ydych chi’n chwilio am god deialu yn y DU? Bydd ein teclyn rhifau ffôn yn eich helpu i chwilio am ardaloedd a chodau.

Help and advice with your phone and broadband services.

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Costau, bilio a newid

Learn more about call costs, billing problems and using your phone abroad, as well as advice if you're considering switching

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