Usar o APKPure APP
Obter o APK da versão antiga de 4G Switcher para Android
Força VOLTE e 4G na rede 3G / 2G.
Change Signal to only 4G. Especially for phones which don't have 4G/3G option and have only 2G/3G/4G.
Switch to this app for better signal of 4G or 3G.