您好 !
Samsung Galaxy S6 G920f
支持 联通4G/3G/2G ; 移动2G ;
所以, 请用联通卡使用数据流量.
````````````````````````````````````````````````````````````````````````````````````````````
如果用了联通4G卡仍 4G 网络不可用
建议您関机拔电池, 等30秒後放回重启手机
点选, 设定 > 无线和网络 > 移动网络 > 4G/3G/2G 自动 [勾选]
然後点选, 设定 > 无线和网络 > APN 设置
在 APN设置内, 勾选所属营运商的接口
希望这能帮到你 !!