Best solution for congested wifi, poor wireless signal, no wireless router at home, old wireless router only supporting 802.11b, poor network performance of Chromecast and other tv sticks * Plug & Pla. Jun 28, 2016. Neglected channels could add Wi-Fi capacity if router makers used them properly. The 2.4-GHz band works the best here: It easily penetrates walls. to routers like Portal that use Dynamic Frequency Selection to detect the….