Huawei has relied on the Google-developed Android operating system to power its popular range of smartphones.

Other than Apple devices which run on iOS, smartphones makers including Samsung and LG are almost all dependent on the Google-developed Android operating system to power their devices.
According to reports by Reuters and The Verge, Google has suspended business with Huawei and in doing so hugely undermined its lineup of smartphones and tablets which run on Android.

Huawei: The company and the security risks explained
Google has confirmed it is complying with sanctions issued by the White House last week, although it is unclear what that will involve.
The company said it was “reviewing the implications” of complying with the sanctions, but added that the Android app store Google Play and the security protections provided by Google Play Protect would continue to function on existing Huawei devices.
According to Reuters, Google’s move means Huawei devices will immediately lose access to updates from Android, meaning security updates for the operating system will no longer protect those devices.
Reuters added that new Huawei devices will also lose access to the Google Play Store and Gmail and YouTube apps, likely because they won’t be based on either Android or iOS – the only mobile operating systems those services are available on.