I signed up for AT&T through Costco in December, bringing my kids and parents onto my plan. My parents were trading in their iPhone 14s for new iPhone 16 Pros, while my kids and I got iPhone 15s without a trade-in. When the phones arrived, my father's iPhone 16 was defective and stuck on the "Hello" screen. After calling customer service and our sales rep, we were directed to an AT&T store, where they confirmed the phone was defective but refused to help since we went through Costco. After hours on the phone, we managed to activate a temporary phone for my dad. Despite countless calls and 10 hours of time spent, it took forever to get a replacement. AT&T promised a credit for the inconvenience, but by the second billing cycle, it was still missing. Two more calls totaling 1.5 hours went nowhere, and after waiting 45 minutes to speak to a supervisor, they disconnected me. Don't make the switch—Costco should ensure their partners offer better customer service. Their dedicated Costco members line is horrible. I love Costco but that is the last time I ever use one of their partners.
