Re: IPhone 7 not sending message, but can receive message
Sorry for a late reply.
The problem was I can't send a SMS out; while I can receive one.
Following the instructions by the Rogers support, I inserted the SIM card belonged to this iPhone to another Android phone; it turned out that it can send/receive SMS. That said the phone line is set up properly.
Then, I put the SIM card back to my iPhone, and did factory reset without connecting any iTune ID. The message function still didn't work. To this end, we suspected that there maybe something abnormal for this phone.
I was told to wait for another iPhone in the next couple of days as a replacement. If the new one works, I will send back the malfunction one.