Hi all Bought my mum a new iPhone 5S from Apple. Have tried everything, restored as new and reset network settings but still have a weird problem with imessage. When sending her an iMessage from my iPhone, it will only go to her phone if I message her icloud address (Apple ID). If I message her mobile number, the send button is blue and the message sends but it never says delivered. Sometimes rarely an odd message or 2 get through. Both the mobile number and email address are selected in "send and receive" settings of iMessage. Anyone have any ideas?