I was unlucky enough to lose my O2 PAYG phone. O2 sent me a replacement simcard and it seems to work ok on calls and incoming texts. On outgoing texts however it just gives an error message saying Not Delivered.
Its an Iphone 7 plus with software v14 Have I set something wrong or is it something wrong with the setup at O2 ? My lost phone was an Iphone 4 and worked fine.
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