? Excuse me, I want to send a message to someone I don't know very well, and ask others to save their phone number. How to say it properly? Thank you! ! !

I don't think you should send text messages to people you don't know very well. Well, please ask someone else to keep your phone number. I think you want to say properly that he is polite. I think you can call him directly. I want to rob him more than send a text message. Maybe you don't know him. If you text him to keep your phone number, it may be enough to attract his attention, or he may take it as a joke. I think you should find some excuses to get in touch with him personally, tell him personally, make him hungry and tell you what's going on. Then, if you tell him yourself, I think it will attract his enough attention and save your phone number. Otherwise, I think you should give him a call and send him a message. I don't think it's enough to get his attention. Maybe this will make you feel like a joke.