The phone market moves fast: prices change weekly, models arrive and sell out. A post from last month with an old price brings an upset customer and an argument. A store whose prices update from a single sheet keeps what is written always true.
Customers do not want to tour your branches. When they can see which branch has the phone they want, they make the trip ready to buy. And when tills and stock are connected, staff never need to phone another branch to check.
Instalments and trade-ins turn a hesitant visitor into a buyer. A calculator showing the monthly amount by down payment and term, plus an initial valuation for their old phone, tells customers exactly what they will pay before they arrive — which shortens the sale considerably.