For wireless device activation and carrier plan management in La Mesa, Walmart Wireless Services operates a dedicated Connection Center counter inside Walmart Store #5140 at Grossmont Center. The counter processes new-line activations, upgrades, and trade-ins across Verizon, AT&T, and T-Mobile networks, serving the small-business operators and service-industry workforce who run garment-care enterprises like Tam's Alteration & Dry Cleaning. Device-setup services include contact transfers, app installations, screen-protector application, and case fitting, bundling accessory attachment with activation in a single transaction. Technicians configure mobile-payment wallets and NFC tap-to-pay functionality during setup, enabling the same contactless checkout technology that point-of-sale terminals at La Mesa retailers like Allen's Flowers & Plants - La Mesa process at the register. The Connection Center handles prepaid and postpaid activations across all three major carrier networks, provisioning SIM cards, configuring VoLTE, and enabling Wi-Fi calling on devices ranging from entry-level smartphones to flagship handsets.