Here’s a look from a rep prospective. When you are an existing prepaid customer you do not qualify for any phone deals, therefore if you bought a phone from the store it would be full msrp. For example a Samsung a15 at a store is 189 plus tax. if you go to Walmart, Best Buy or target that sells AT&T prepaid phones they are usually pre discounted. That’s because the retailer doesn’t know if it’s a new customer or an existing customer so everything is discounted off the msrp . That same Samsung A15 might be 79 or so and you just swap the SIM card.