APKPure Appを使用する
Radio Switcherの旧いバージョンをダウンロードすることが可能
ラジオスイッチャー
Radio Switcher is a simple application that allows you to access the secret menu of Android to manage / select the type of GSM or WCDMA (3G).
very useful for those who have a handler that uses only the UMTS network, in this case is sufficient to force the network by selecting WCDMA Only.