For persistent issues, Vivo’s official customer support remains the final reliable recourse, especially under warranty. Meanwhile, using a 2.4 GHz-only router on a fixed channel (6 or 11) with WPA2 remains the most stable environment for the Vivo Y02. 1.0 Last Updated: 2025 Applicable Models: Vivo Y02 (PD2232F), Vivo Y02s (similar Wi-Fi architecture)