The significance of birthday girl's mobile phone

Judging from your photos, your mobile phone is shaped like a birthday girl. It means longevity.

Shouxing (the mythical god of longevity)?

The longevity star, also known as the Antarctic old man, is the god of longevity in ancient mythology. He is also a fairy in Taoism. Formerly known as Star, it is one of the three stars with happiness, wealth and longevity. After Qin Shihuang unified the world, Shouxing Temple was built in Duxian County near Chang 'an. The birthday star evolved into the name of a fairy.