Washington — The US has told Germany that it will share less intelligence with its security agencies if the country's wireless network uses China's Huawei Technologies to upgrade to 5G, the Wall Street Journal reported on Monday, in the first explicit US warning to Germany of consequences for declining to shun Huawei. The US ambassador to Germany, Richard Grenell, issued the warning in a letter dated March 8, the newspaper said. In Germany, economy minister Peter Altmaier said on Thursday on a ZDF talk show that Germany did not want to ban Huawei but said that Berlin would change the law to ensure that all components used in the 5G networks would be secure. Grenell said in his letter that Chinese companies, under Chinese law, can be required to support China's security agencies and that inspections of Huawei software could not ensure there were no vulnerabilities, the newspaper said. The battle with Huawei is one of many conflicts in Washington's disputes with China. The US and Chin...

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