U.S. officers say Huawei Technologies Co. can covertly obtain mobile-cellular phone networks around the entire world by means of “back doors” built for use by law enforcement, as Washington attempts to persuade allies to exclude the Chinese firm from their networks.

Intelligence shows Huawei has had this magic formula functionality for a lot more than a 10 years, U.S. officers mentioned. Huawei rejected the allegations.

The…