Here in the US, for example, 3g coverage is spotty outside urban areas, leading to intermittent connection issues and slow speeds.

比如，在美国，3g在市区之外的覆盖就是参差不齐的，会导致间歇式连接和慢网速的问题。

youdao

Although there is mobile phone coverage over most of the course, there are some areas where coverage is either non-existent or intermittent.

大部分赛道均属手提电话网络覆盖范围，惟也有部分地区并无网络覆盖或存在接收讯号断续情况。

youdao

"A fault at a base station near Aylsham led to it occurring across a number of sites across the area, which has meant there has been intermittent coverage, " he said.

BBC: North Norfolk mobile phone coverage 'restored'