Question about Samsung Galaxy A15 5G

The product name is the "Samsung Galaxy A15 5G". The product description says "128GB, Blue, Black, 6.50", Hybrid Dual SIM, 0.00MP, 4G". My question: is the phone 5G or 4G ???? And if it's 5G (as I think it is), why does the description explicitly say 4G and not 5G ????