I asked veterans if they could use their mobile phones.

Actually, according to the regulations, soldiers are not allowed to use mobile phones! Veterans sometimes use mobile phones because they are familiar with all aspects. As long as it's not too ostentatious, you generally don't care!

As the saying goes, only those who don't work hard and are not lazy have no vision! Veterans even use their mobile phones to look at the time and use it according to the time! I don't need it if I can.