Boost Mobile at 5151 W Diversey Ave is praised for its exceptional customer service and knowledgeable staff. Customers report positive experiences when seeking assistance with SIM card changes, account issues, and phone upgrades. Staff members are described as friendly, patient, and professional, often going above and beyond without charging for their help. Many have received thorough support, including troubleshooting problems and setting up new devices at great deals. The store's welcoming atmosphere and willingness to assist customers with technology make it a top choice in the Diversey area. Overall, Boost Mobile is recognized for its commitment to customer satisfaction and high-quality service.