The Mate X supports next-generation 5G networks and will cost 2,299 euros ($2,606) when(it is省略） released in the summer. When (it is省略) folded, the Mate X has a 6.6-inch display; but when(it is省略) opened out, it becomes an 8-inch tablet computer. 

参考译文：Mate X支持下一代5G网络，在夏天发布时将花费2299的欧元(2606美元)。当被折叠后，Mate X有一个6.6英寸的显示器；但当被打开后，它就变成了8英寸的平板电脑。