I absolutely agree 7 is too early for a mobile phone and we know that and so does S7. I have explained to him that the phone was given to him because he couldnt see H, so the phone will be disappearing once we are out of isolation and back from holiday.
Re OW, i asked S7 if he would ever txt with her and he said unlikely, he read her txt but didnt respond, so i deleted it and no further ones followed. I thin the topic is closed for the next 3/5 years until he get a mobile phone.