Hidden away in front pants pocket.
Belt holsters are a pinnacle of bad taste.
While we are on the subject:
Smartphone cases are idiotic.
A significant portion of a smartphone’s cost is due to the development of such a slim chassis. If you put your phone in a case you are paying to negate this advantage.
Phone case “protection” has evolved to the point of absurdity:
“I’m sorry I missed your call. Your call will be returned in approximately twenty minutes when I have removed my phone from it’s LifeProof case.”