The mobile trade loses money at the moment of hesitation
Almost nobody walks into a mobile shop and buys nothing because they did not want a phone. They leave because the colour was not there, the EMI needed a document they had not carried, the exchange value felt low, or they wanted to check one more shop. Every one of those is a live customer with a decision window of about seventy-two hours, and in most shops not one of them is written down.
That is the entire case for a CRM in mobile retail. The sale you already made is handled by your billing software. The sale that nearly happened is handled by nobody. Capturing it takes thirty seconds at the counter and turns a shrug into a callback list that a salesperson can work at four in the afternoon.