A. 1. Switch your iPhone to connect to a 2.4GHz network instead of 5G, as many smart bulbs do not support 5G. 2. Check your router settings to ensure that both 2.4GHz and 5GHz bands are enabled.
B. 1. If you have a dual-band router, create a separate SSID for the 2.4GHz network to make it easier to connect your bulbs. 2. Use a Wi-Fi extender that supports 2.4GHz to improve connectivity in areas where the bulbs are located.