One of the most annoying issues I have is with basic SMS from a non-iPhone user. The notification doesn't give me the sender's name, it just gives me their number, even though it's in my Contacts and I've just sent them an SMS. Not everyone I send messages to lives in an iMessage bubble or has WhatsApp or whatever. I've raised this as bug with Apple and they've flagged it as a duplicate. Many iOS updates later it somtimes it says [Maybe: <Person's Name>] as the notification. Why maybe? It never use to say that.